CROP PRODUCTION
Year:2021 | Volume:14 | Issue:1|Papers Count:12

In scale universal after drought, nitrogen is the most important factor limiting. After nitrogen, phosphorus is the most nutritious element for plant. Between nitrogen and phosphorus is a positive reaction and absorption nitrogen increases absorption phosphorus by plant. The Studies very few is performed in order to study fluorescence chlorophyll plant in nutritious shortage stress conditions. Reduction access to nitrogen decreases quantum yield in transfer electron (photo system II) and its maximum efficiency. Also shortage of nitrogen destroys photo system II and decreases fluorescence variable (Fv). Quantum yield increases consequently interaction effects nitrogen and phosphorus. In view of the fact that measurement concentration nitrogen with methods like measuring Nitrogen Nutrition Index (NNI) is very costly, take up time and need to expensive equipment, so measurement chlorophyll index by hand chlorophyll meter and transportable is very comfortable. Also consumption of nitrogen is improved pigments, as rate of chlorophyll (a, b) increases by using nitrogen. this research in order to study relations between concentration nitrogen, chlorophyll (a, b), chlorophyll index and nitrogen nutrition index (NNI) and study parameters fluorescence chlorophyll and rate of chlorophyll (a and b) under effect of different treatment fertilizer of nitrogen and phosphorus in wheat was performed. Afield experiment was conducted in a factorial arrangement using randomized complete block design with 4 replications in Aliabadkatool city of Golestan province in 2014-2015 and 2015-2016 growing seasons. The experimental factors were three net nitrogen fertilizer (N, 0, 163 and 326 kg ha-1 and five net phosphorus fertilizer (P, 0, 98, 196, 294 and392 kg ha-1. ) In this experiment some traits such as chlorophyll index, nitrogen nutrition index, fluorescence chlorophyll parameters, rate of chlorophyll (a, b), nitrogen concentration, grain protein and grain yield were measured. The study of scattering diagram of data be showed, traits of chlorophyll index, nitrogen nutrition index, quantum yield, chlorophyll concentration (a, b), nitrogen concentration in plan and yield protein follow from simple linear regression model, as in each level nitrogen, with increase rate of fertilizer phosphorus, traits under study were prospered from increasing trend. Concentration of nitrogen and nitrogen nutrition index was under effect interaction year and nitrogen. Fluorescence chlorophyll parameters including minimum fluorescence, maximum fluorescence (Fo, Fm) against other traits were showed decreasing trend, That connected to increase quantum yield consequently increase in consumed fertilizer. Correlation of significant and positive between chlorophyll index, nitrogen nutrition index, nitrogen concentration, chlorophyll was observed. The maximum yield achieved at combination of fertilizer N326P392 and N326P294that point of view statically was in one of surface significantly. The results this experiment showed that very strong relation is between chlorophyll index, chlorophyll concentration, Nitrogen nutrition index and nitrogen available to plant, as with increase available nitrogen and phosphorus rate, quantum yield and grain yield increased grain yield, so can be used from chlorophyll meter set for assessment fertilizer in plant replacing methods of expensive and take up tim like nitrogen nutrition index. In management fertilizer in addition on nitrogen, phosphorus must be considered too.

Background and objectives: Biotic stresses affect the yield and yield components of cotton. Alternaria leaf spot (caused by Alternaria alternata) is one of the most common foliar diseases of cotton (Gossypium spp. ) and occurs in most cotton-growing regions of the world. Control of the disease through genetic resistance is not possible at present because no cotton cultivars with high levels of resistance to A. alternata are commercially available. In the past decade, the effectiveness of resistance-inducer salts against plant pathogens gives an environmentally friendly option for disease control. Therefore, the impact of salicylic acid on disease control, plant growth and some biochemical constituents of two cotton cultivars (Gossypium hirsutum L. ), Golestan and Sahel under A. alternata stress, were evaluated. Materials and methods: Treatments, four levels salicylic acid (0, 0. 05, 0. 1 and 0. 5 mM) and two level inoculation factor (control and pathogen) as a factorial experiment in a completely randomized design with four replications were studied in field condition. 20-day old cotton plants were sprayed with different concentrations of salicylic acid and the treatment were repeated two times at 14 days intervals. Effect of salicylic acid on the differences in growth traits (plant height and number of sympodial branch), yield and disease index in two cotton cultivars (Gossypium hirsutum L. ), Golestan and Sahel, were evaluated. Also, changes of total phenol, peroxidase activity and malondialdehyde contents were measured by chlorometric analysis. Results: The results showed that the isolate of A. alternata tested in this experiment were pathogenic to cotton cultivars. Although, Golestan cultivar were more susceptible to alternaria leaf spot than Sahel cultivars. Foliar applications of salicylic acid have been shown to significantly affect yield, disease index, total phenol, peroxidase activity and malondialdehyde contents in two cotton cultivars. 5 mM salicylic acid by significant increasing total phenol contents and peroxidase activity, alleviated the malondialdehyde contents and oxidative stress lead to low disease severity in all cultivars. Yield and oxidative stress affected significantly in Sahel in comparison to Golestan cultivar. The relationship between disease index and yield and leaf phenol accumulation, peroxidase activity and malondialdehyde contents in relation to disease index in the presence of salicylic acid concentrations was described as regresional models. Conclusion: Overall, this research revealed that seedlings treatment with salicylic acid has provided most optimal performance against A. alternata infection and oxidative stress. Although, the effect was different in two cotton cultivars. Hence, using of salicylic acid as a biotechnologic approach be suggested for improve plant to alternaria leaf spot resistance.

Background and objectives: Sunflower (Helianthus annuus L. ) is one of the most important oil plants, which is cultivated due to the high seed oil and adaptation to different climatic and soil conditions in a wide range of arid and semi-arid regions of the country. Due to the possibility of drought stress in these areas, it is essential to take action to cope with these stresses. One of the methods to reduce drought stress is the use of plant growth regulators. Considering that brassinolide is the plant growth regulating steroidal substance that can affect the increase of plant resistance against different stresses. Therefore, the aim of this study was to investigate the effects of brassinolide foliar application on some physiological and agronomic characteristics of sunflower in one of the semiarid areas of the country. Materials and methods: The experiment was conducted in the Noorabad area of Fars province using split-plot in a randomized complete blocks design with three replications and nine treatments in 2018. The main factor of the experiment included irrigation at three levels which consisted of without stress (100 percent of full irrigation), moderate stress (75 percent of full irrigation), and severe stress (50 percent of full irrigation) according to evaporation from class A pan, and sub-factor including the application of brassinolide hormone at three levels (0, 0. 1 and 0. 5 mg/L). Results: The results showed that yield, number of seeds per head and weight of 1000 sunflower seeds were affected by experimental treatments, using 0. 5 mg/L brassinolide foliar application under severe drought stress conditions can significantly increase chlorophyll content and number of leaves per plant, therefore, the yield, number of seeds per head, 1000-seed weight and oil yield increased compared to control treatment. The highest grain yield (313. 3 g/m2) was obtained in complete irrigation treatment and 0. 5 mg/L brassinolide foliar application, so that 55% of the grain yield was higher than the control treatment. Also, the percentage and yield of oil were reduced under drought stress but the amount of these two traits was increased with brassinolide hormone application. The highest leaf proline content observed in 0. 5 mg/L brassinolide foliar application and the lowest of this trait was obtained in the control treatment. Conclusion: The results of this experiment showed that the use of brassinolide foliar application under severe drought stress conditions can increase drought tolerance by 63%. Therefore, under severe stress conditions, the use of brassinolide foliar application can be a solution to increase the production of sunflower.

Background and Objectives: Herbicides are essential inputs in agriculture that despite their many benefits in controlling weeds, can cause damages such as creation resistance to weeds, environmental effects and threats to human health. Therefore, to reduce consumption or reduce their concentration, alternative methods such as weed control using biological microorganisms have been proposed, which to achieve this goal, it is necessary to have a complete understanding of pathogen-host relationships. Achieving such understanding can be difficult and challenging, particularly for large data sets with complex host genotype-by-pathogen strain interactions. To evaluate the pathogenicity of fungi in plant species, in addition to conventional quantitative and descriptive evaluations, the host genotype-pathogen isolates biplot can be used in a single scatter plot. This study was conducted to evaluate the virulence of two funguses on five rice cultivars and four weeds. Materials and Methods: In this research, pathogenicity of Curvularia lunata and Alternaria pellucida were studied in two separate experiments on five rice cultivars (Hashemi, Alikazemi, Sepidroud, Khazar, Binam), Eichinochloa oryzicola, E. crus-galli, Sagitaria trifolia and Alisma plantago – aquatica in a completely randomized design with three replications in pot condition, in the greenhouse of Islamic Azad University, Rasht Branch, at 2018. Principal component analysis was performed on two-way data of host genotype-pathogen. The biplot was plotted with the first two principal axes (PC1 and PC2) using GGEBiplotGUI packages (Bernal & Villardon, 2016) in R software. Results: Analysis of variance was performed separately for weed species and rice cultivars. There were significant differences between rice cultivars in terms of reduction of plant height and fresh and dry weight of the plant in inoculation with C. lunata and in terms of reduction in plant height and dry weight of the plant in inoculation with A. pellucida. In addition, there was a significant difference between weed species in terms of disease rating, decrease in plant height and fresh weight of the plant in inoculation with C. lunata and in all four traits in terms of inoculation with A. pellucida. Comparison of means showed that Hashemi and Ali Kazemi cultivars had the highest disease rating, reduction of plant height and fresh and dry weight of the plant in treatment with C. lunata. Biplot analysis showed the relationships between fungi (as pathogens) and weed species and rice cultivars (as host genotypes) in a pathogen-host view in terms of traits. Average-Tester-Coordination (ATC) view (average of PC1 and PC2 scores for all genotypes) of biplot were indicated that A. plantago – aquatica and E. crus-galli were as the most sensitive and Sepidroud as tolerant genotypes to two fungi according to their disease rating. Based on disease rating, C. lunata can be used for biocontrol of A. plantago– aquatica and E. crus-galli in Ali Kazemi and Binam genotypes. Based on this trait, A. pellucida can be used for biocontrol of S. trifolia in Hashemi. According to dry weight, C. lunata can be used for biocontrol of Sagitaria trifolia in all of the genotypes. Conclusion: In conclusion, based on disease rating and reduction of plant height and dry and fresh weight of plants, C. lunata was a better antagonistic fungus in dealing with weeds compared to the other fungus especially for A. plantago– aquatica and this fungus could be a potential mycoherbicide for weeds control in paddy fields in the future.

Background and objectives: Intercropping is a possible pathway for sustainable increases in crop yields (10). Researchers have reported that intercropping system with legumes led to maximum maize gain (24) and biological yield (4). Ghasemi et al. (2011) reported that grain yield in maize was the highest when the combination of chemical and bio-fertilizers were used (8). Materials and Methods: This experiment was performed as factorial arrangement based on randomized complete block design in 2017 and 2018 cropping deasons with three replications in Rasht, Iran. Five rate of phosphorus fertilizer (zero, 50, 100 kg/ha as super phosphate triple, 50 kg/ha as super phosphate triple + 200 g phosphate barvar2 and 100 kg/ha as super phosphate triple + 200 g of phosphate barvar2) and corn and groundnut sol cropping, and mixed cultivation of one row of corn + one row of peanuts (1: 1), two rows of corn + one row of peanut (1: 2), one row of corn + two rows of peanut (2: 1) comprised experimental treatments. Results: In this experiment, phosphorus fertilizer × intercropping system effect on all measured characteristics was significant at 5 % probability level. The greatest grain yield (2360 kg/ha), oil yield (1182 kg/ha), grain protein percentage (27. 70 %), protein yield (591 kg/ha) and palmitic acid (10. 58 %) were obtained in response to the application of 100 kg/ha super phosphate triple along with 200 g phosphate barvar2 bio-fertilizer under groundnut sol cropping system. The greatest grain oil percentage (53. 45 %) and oleic acid (66. 63 %) as the most important unsaturated fatty acid in groundnut oil were obtained in response to the application of 100 kg/ha phosphorus fertilizer as super phosphate triple, under groundnut-corn intercropping system with the ratio of 1: 2 planting rows. But, the highest rate of linoleic acid (32. 17 %) was observed in groundnut-corn intercropping system with the ratio of 1: 1 planting rows as affected by the application of 100 kg/ha phosphorus fertilizer as super phosphate triple plus 200 g phosphate barvar2 bio-fertilizer. Conclusion: Results showed that the combined application of chemical phosphorus and bio-fertilizers enhanced groundnut grain yield that could causes by the improvement of yield components, enhancement of plant growth and nutrients absorption and increment of photosynthesis in groundnut plants. Apart application of chemical phosphorus fertilizer increased oleic acid synthesis and quality of groundnut oil. The application of chemical phosphorus fertilizer and groundnut-corn intercropping system with the ratio of 1: 2 improved groundnut oil quality. But, integrated application of chemical phosphorus (super phosphate triple) plus phosphate barvar2 bio-fertilizer enhanced quantitative yield of groundnut. In this experiment, groundnut-corn intercropping system with the ratio of 1: 2 and integrated application of chemical phosphorus plus phosphate barvar2 bio-fertilizer could be recommendable to enhance grain yield of groundnut per unit area.

Background and objectives: Endemic vegetables are a wide range of plants that are known and used in different regions with different names and are native to the region. But a group of them, which are found in most areas, are more common in food, and some of them are used as medical treatment, sedatives, and in health and cosmetics. These plants grow away from chemical fertilizers and in the sun and have a different flavor and are more nutritious and natural than vegetables grown artificially. The increasing use of chemical fertilizers has caused irreparable environmental and health damage. These disadvantages of chemical fertilizers and the high cost of their production have caused the production of biofertilizers to be given serious attention. This study aimed to investigate the effect of organic fertilizers (vermicompost, vermiwash) and mycorrhizal symbiosis on yield and yield components of Nasturtium officinalis. Materials and Methods: This factorial experiment in the form of a randomized complete block design with 8 treatments and 4 replications in Sari with a geographical position of 53 degrees and 63 degrees East, 36 degrees latitude, and 82 minutes north and 43. 3 meters above sea level in 2014. The test factors included mycorrhiza Glomus moseae in two levels (0 and 200 spores in a pot), vermicompost in two levels (0 and 200 g in a pot), and foliar application vermiwash in two levels (0 and 1. 5 liters in the specified pots). Characteristics such as leaf area index, chlorophyll a, b, and total chlorophyll, the concentration of nitrogen, phosphorus, potassium, fresh weight of leaves and stems, number and diameter of flowers and weight of 1000 seeds were evaluated. Results: The results showed that the use of organic fertilizers (vermicompost, foliar application of vermicompost) and mycorrhizal coexistence increased leaf area index, 1000-seed weight, and percentage of phosphorus, nitrogen, and chlorophyll a, b compared to the control. Mycorrhizal symbiosis treatment with foliar application of vermicompost and application of vermicompost caused 53% increase in 1000-seed weight, 245% nitrogen, 72% phosphorus and 65% chlorophyll b compared to the control. According to the obtained results, combining G. mosseae treatment and foliar application with vermicompost and application of vermicompost had better results than other treatments. Conclusion: generally, Organic and biological fertilizers have a positive impact on the yield and yield components of Nasturtium officinalis The application of vermicompost, compost tea, and mycorrhizal symbiosis through the availability of nutrients has increased the Nasturtium officinalis qualitative and quantitative qualities.

Background and objectives: Undoubtedly, one of the biggest human challenges in the present age is food security, and salinity stress is one of the main obstacles to achieve this goal. In this regard, this experiment was conducted with the aim of selecting tolerance barley cultivar(s) to salinity stress and identifying tolerance mechanisms in new and old barley cultivars. Materials and Methods: This experiment was carried out during the two years of 2016-17 in the Milshbar Ardakan region located in Yazd province. Experimental treatments included 9 six-rowed barley cultivars including Nik, Mehr, Khatam, Reyhan, Goharan, Nosrat, Morocco, Afzal and Fajr 30 cultivars in three levels of irrigation water salinity including 4, 10 and 14 dS/m were evaluated as a split plot experimental design so that water salinity as the main plots and cultivars as a sub-plots were randomly placed. The studied traits included yield and yield components. At the maturity stage, several plants were selected from each experimental plot and sodium and potassium were measured. Results: The results showed that salinity and cultivar treatment had a significant effect on the yield and yield components including number of seeds per spike, number of spikes per square meter and 1000-kernel weight. Salinity stress reduced grain yield components and among the studied cultivars, Nik, Mehr, Khatam and Reyhan cultivars had higher yield and yield components. Among the salinity treatments, the highest grain yield was obtained at 4 dS/m with 5770. 64 kg/ha. With increasing salinity to 10 and 14 dS/m, grain yield decreased by 18. 04 and 27. 55%, respectively, and reached to 4729. 29 and 41. 8080 kg/ha. Among the studied cultivars, the highest grain yield was obtained in Nik with 5317. 7 kg/ha and Mehr, Khatam and Reyhan were not significantly different with this cultivar. In salinity of 10 dS/m, the lowest grain yield variation were obtained in Goharan and Mehr cultivars and in salinity of 14 dS/m it was in Mehr and Afzal cultivars. The highest STI index in salinity of 10 compared to 4 dS/m was calculated in Nik and Mehr cultivars with 0. 922 and 0. 921, respectively. The highest value of this index in salinity 14 compared to 4 dS/m was also obtained in Nik and Khatam cultivars with 0. 882 and 0. 858, respectively. Conclusion: Considering the amount of sodium and potassium absorbed by the plant and the K/Na ratio, it seems that tolerant cultivars cope with salinity stress by the mechanism of potassium uptake and excretion of sodium and regulation of cell osmotic potential. In general, among the studied cultivars, Nik, Mehr and Khatam cultivars had higher stress tolerance indices of STI, MP, Tol and these cultivars can be used for cultivation in saline lands of the region as well as for hybridization and breeding programs.

Background and objectives: Intercropping of basil with legumes due to morphological differences and more importantly, their biological stabilization can be a step towards sustainability in agriculture and also to avoid the use of chemical inputs and therefore produce healthier products. Therefore, the objectives of this experiment were to evaluate and compare different indicators of growth, yield and ecological and economic usefulness of basil with green bean in pure crops and mixed replacement ratios in Mashhad climatic conditions. Materials and Methods: An experiment was conducted in RCBD design at the research farm of Ferdowsi University of Mashhad in the growing year 2018 19. The treatments were: 1) sole cropping of green bean (P), 2) and also basil (O) and different ratios of intercropping of these two plants, including 3) 1: 3 ratio of green bean and basil (P1O3), 4) ratio 2: 2 green bean and basil (P2O2) and 5) 3: 1 ratio green bean and basil (P3O1). Daily values of growth indices during the growth period of plants were estimated using the specific functions, and at the end of the growing season, the final yield of intercropped species (fresh green pods of green bean and basil dried seeds) was measured and indicators related to the advantage of intercropping including land equivalent ratio (LER), actual yield loss (AYL) and the monetary advantage index (MAI) were calculated. Function fitting, statistical analysis of data and drawing of figures were performed using Slide Write ver2. 0, SAS v 9. 2 and MS Excel 2016, respectively. Results: The highest LAI recorded in sole cropping of green bean and basil (3. 4 and 3 respectively) and the lowest was for green bean in P1O3 (0. 2) and for basil in P3O1 (2). Also, highest TDM in sole cropping of green bean was 973 g m2 and in sole cropping of basil was 1654 g m2 and the lowest ones for intercropped green bean was in P1O3 (44 g m2) and in the intercropped basil in P3O1 (755 g m2). The highest CGR of green bean and basil in their sole cropping were 20. 56 and 17. 92 g m2 day-1, respectively. The mean RGR of green bean was 0. 03 g g-1 in P1O3 and the highest RGR was in basil in the sole cropping treatment (0. 03 g g-1) The highest NAR in green bean was in its sole cropping (8. 3 g m2 day-1) and basil (8. 5 g m2 day-1). No economic yield was achieved for green bean in P1O3 and P2O2 treatments, so all the advantage indices of intercropping including LER, AYL and MAI in these treatments were negative. Also, the highest yield of basil was obtained in P1O3, which was not significantly different from its sole culture, and only in this treatment the intercropping advantage indices studied were positive and preferred to sole culture. Conclusion: The results truly showed incompatibility of basil with green bean in intercropping due to low competitiveness and weakness of green bean in intercropping with basil. Although intercropping in P3O1 treatment was economically and ecologically beneficial, but by considering all the conditions such as the possibility of implementing this cultivation ratio, it is suggested that while examining more different aspects of intercropping of basil with green bean such as weed competition and mechanisms of basil competition with green bean, another legume crop that has more desirable characteristics in terms of ecological compatibility and non-interference of ecological niches with this plant to replace green bean in basil production systems.

Background and objectives: Sunflower belongs to the Astraea family and is one of the three important oil plants in the world, it has a high percentage of achene oil (45-50%). One of the main reasons for the low sunflower achene yield, is the lack of micronutrient elements. Thereforestrengthen, maintain productivity and determine the most appropriate crop density, in the new sunflower cultivars is necessary to achieve the desired yield. The present experiment was also performed basis on the selection of the most suitable promising sunflower cultivars in the best plant density and application levels of complex fertilizer flourish microcombi in Dezful city. Materials and Methods: In order evaluation of yield and some quantitative traits of promising sunflower cultivars to foliar application of microcombi complex fertilizer and interaspecific competition, An split split plot experiment in a randomized complete blocks design with three replications and three factors density as the main factor (7, 9, 11 and 13 plant/m2), complex fertilizeras the first sub-factor (0, 1 and 2 kg/ha) from the source of complex fertilizer flourish microcombi produced by Shimikord company and cultivar as a second sub-factor (Felix, Shakira, Oscar, Savana, Shams, Labad, Sudimance, Monaliza) carried out in the crop year 2018-2019 at Dezful Shahid Rajaei Company. The seeds of the tested cultivars were prepared from Shahid Rajaei Dezful Company. Each experimental plot was considered with 6 planting line to length of 1. 5 m with a lines spacing of 75 cm and according to the density of 7, 9, 11 and 13 plant/m2, the plants were arranged on planting lines at intervals of 18, 15, 12 and 9 cm in the three to four leaf stage, respectively. After physiological maturation of achenes and harvesting of plants, traits stem height, stem diameter, head diameter, number of achene/head, achenes of weight/head; achene yield and oil yield were measured. Results: The results showed a significant effect of foliar application of complex fertilizeras and density on the studied traits except stem height. Shams cultivar with 198. 36 cm, had the maximum stem height. According to the results, foliar application of complex fertilizeras causes increases the stem diameter, number of achene/head, achenes of weight/head and achene and oil yield (t/ha) relative to the control. Also increasing planting density, despite reducing the number and weight of achene/head, increased achene yield. With increasing density, achene yield of single plant decreased, but increasing the number of plants per unit area compensated for this decrease. According to investigation the results of comparing the means, foliar application of complex fertilizeras by improving yield components and reducing competitive stress between plants at high planting densities, cause increase achene yield in sunflower. The maximum achene and oil yield were obtained to 5. 40 and 2. 64 t/ha, respectively, in the density 11 plant/m2 and foliar application 1 kg/ha complex fertilizeras by Felix cultivar. The increase yield in the density of 11 plant/m2, can be the result of sunflower adaptation by increasing the plant density and shows the achene yield has changed relatively little. Oil yield depend to achene yield and oil percentage, therefore, it seems that in the present experiment, higher achene yield in the density of 11 plant/m2 and improved photosynthesis and proper achene production in the time foliar application of complex fertilizeras, caused to increase oil yield. Conclusions: Now with aware of the response of cultivars at different plant densities per unit area; it seems that the beneficial effect of foliar application of complex fertilizeras can cause reduce the damage by intraspecific competition and increase the yield of different sunflower genotypes in conditions of Dezful city and similar regions.

Introduction: Despite the P vitality for rice cultivation, its recovery index in paddy soils is very low and less than 25% of added P, and the rest goes out of reach of rice plant through the P fixation by soil particles at different fractions. Also, despite abundant studies on the effect of basal soil P application, we face a lack of knowledge on research findings of the P splitting application and its effect on soil Zn concentration and tissues Zn content. Thus, the current research project was done to explore the effect of P splitting application at flooded conditions on the soil and rice plant tissues P and Zn variation trend at the different rice growth stages of two more common varieties (Hashemi and Guilaneh varieties). Materials and methods: The outdoor pot experiment was conducted on a three factors factorial experiment in a randomized complete block design with three replications in 2017 at the research farm of the rice research institute of Iran, Rasht. The experimental treatments were: phosphorus fertilizer split application at five levels, soil at two levels, and rice varieties at two levels (Hashemi (local variety) and Guilaneh(improved variety)), The P application treatments were: control (no added P), 100% basal, P split application at 50% basal and 50% at 20 days after transplanting (DAT), P split application at 50% basal and 50% at 60 days after transplanting (DAT), P split application at 50% basal, 25% at 20 days after transplanting, and 25% at 60 days after transplanting. Results: The results indicated that the highest soil available P and Zn concentrations were recorded at the flowering stage about 95. 3 and 90. 10, and 8. 6 and 8. 7 mgkg-1by two and three P split for Hashemi and Guilaneh, respectively. Also, the maximum P of rice grain was obtained about 0. 17 and 0. 20 mgkg-1 for Hashemi and Guilaneh, respectively. The Zn content of rice grain at P split pots was significantly more than control and 100% basal application. The highest agricultural recovery (13. 31 and 12. 72), physiological (693. 19 and 740. 10) and physiological-agricultural efficiency (482. 00 and 753. 00), P use efficiency (5. 34 and 5. 66), and apparent recovery (1998 and 1272. 22 kg kg-1) were found for Hashemi and Guilaneh, respectively, in the two and three P split application. Furthermore, stepwise multiple regression analysis revealed that the soil available P concentration at ripening stage, Zn content of the grain, and Zn concentration at rice aerial parts can explain 52% of grain yield variations for studied rice cultivars. Conclusion: The three-stage P splitting (50% soil basal, 25% 20 DAT, and 25% 60 DAT) increased the Zn content of the Hashemi variety by about 54. 72% at slit loam soil, whereas the Guilaneh rice variety was received a 37. 5% increase in Zn content of grain in silty clay through two-stage P splitting (50% soil basal and 50% 20 DAT) compare to control (100 % basal). It can be concluded both three and two-stage P splitting might be positively significantly effective on rice grain nutritional quality.

Background and objectives Pulses with more than 20% protein, have an important role in providing the protein needed by humans especially in countries where livestock production and agricultural products are low. These products can be used in human nutrition as a valuable and suitable dietary supplement in combination with cereals (Majnoun Hoseini, 2015). In Golestan province, due to the positive role of mung bean in rotation, it should have a special place. Farmers of Golestan province should cultivate this useful, valuable, high-yielding, early maturing, uniform in maturity and suitable conditions for mechanized harvesting after grains such as wheat due to the low water needs of this plant in summer and proper crop rotation. Materials and methods In order to study traits of morphologic, yield and yield components of mung bean (Vigna radiata L. ) under nitrogen and megafol fertilizer, a factorial experiment was conducted based on RCBD in three replications on research farm of Gonbad Kavous University in 2017. Nitrogen fertilizer was in four levels of 0, 50, 100 1nd 150 kg. h-1 and megafol fertilizer in three levels of 0, 1 liter and two liters. ha-1. Row spacing was 50 cm and plant on row 25 cm. In this experiment plant length, height of first pod from the ground, number of branch per plant, height of first branch from the ground, number of pod per plant, number of seed per pod, number of seed per plant, 1000-seed weight, plant yield and seed yield was determined. Results Results showed that effect of nitrogen on plant length and height of first pod from the ground at 5% level probability and on height of first branch from the ground, number of branch per plant, number of pod per plant, number of seed per pod, number of seed per plant, 1000-seed weight, plant yield and seed yield was significant at 1% level probability. Effect of megafol fertilizer on number of seed per pod and 1000-seed weight was significant at 5% level probability and on number of pod per plant, number of seed per plant, plant yield and seed yield was significant at 1% level probability. The maximum plant length (63. 63cm), height of first branch from the ground (34. 14 cm), height of first pod from the ground (8. 95 cm), number of branch per plant (3. 98), number of pod per plant (27. 62), number of seed per pod (5. 31), number of seed per plant (148. 4), 1000-seed weight (43. 84 gr), plant yield (6. 51 gr) and seed yield (820. 4 kg. h-1) was belonged to application of 150 kg. h-1 nitrogen. The minimum of traits was obtained from non application of nitrogen. Application of two liters. h-1 megafol produced the maximum number of pod per plant (26. 48), number of seed per plant (141. 2), 1000-seed weight (43. 01gr), plant yield (6. 2 gr) and seed yield (755. 4 kg-1). Conclusion In addition, consumption of nitrogen and megafol created better conditions for growth and production of mung bean and so, the maximum of studied traits was obtained from high consumption of two fertilizers. The minimum of traits was obtained from non application of nitrogen and also non application of megafol.

Background and objectives: Barley (Hordeum vulgare L. ) is one of the most important plants in the cereal family after wheat, rice and corn. Barley is the second most important crop in Iran after wheat in terms of agricultural value and nutrition. The purpose of this study was to evaluate and select superior lines with high yield, early maturity and dormancy resistance in warm regions of the south and north of the country using the selection index of ideal genotype (SIIG). Materials and methods: In order to selection of pure barley lines with high yield and desirable agronomic characteristics in the warm regions of the south and north of the country, 108 pure lines in the non-repeating Augment design with four controls (Norooz /Sahra, Auxin, Nobahar and WB-96-19) in three blocks, in the Centers for Agricultural Research and Education and Natural Resources Fars (Darab), Ahvaz, Sistan (Zabol) and Golestan (Gonbad) were evaluated during 2019-20 cropping year. Results: The results of restricted maximum likelihood (REML) analysis showed that the heritability of grain yield in Gonbad, Ahvaz, Darab and Zabol were 0. 993, 0. 258, 0. 498 and 0. 063, respectively. The results of correlation analysis showed that there is a positive and significant correlation between SIIG index and plant height, 1000-kernal weight and grain yield in all regions. SIIG index showed that 21, 28, 16 and 5 lines in Darab, Ahvaz, Zabol and Gonbad, respectively, with high SIIG index value (0. 6-0. 9) were the best lines. Based on the results of the average SIIG index of lines 68, 102, 44, 66, 13, 47, 16, 34, 46, 99, 25, 65 and 35, respectively, with SIIG value higher than 0. 500 were the best lines in most regions, so they are recommended for cultivation in later years and for advanced testing and compatibility. In order to evaluate the efficiency of SIIG index in selecting the best lines in terms of grain yield, 1000 kernel weight, plant height and early maturity, the studied lines were grouped based on SIIG index in different regions. The studied lines were classified into 6, 7, 8 and 7 groups in Darab, Ahvaz, Gonbad and Zabol, respectively. Conclusion: Based on the results of the average SIIG index in all regions, 16 lines with the highest average value of the SIIG index were top lines in most regions. Selected lines in each region can be recommended for experiments in that region, and lines with the highest SIIG values in most regions for additional testing in all introduced regions in later years.