THE EFFECT OF DIFFERENT GREEN MANURE CROPS AND NITROGEN SOURCES ON WEED BIOMASS AND SOME GROWTH CHARACTERISTICS OF CANOLA

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DABIGHI KH.; FATEH E.; AYNEHBAND A.

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Journal: Crop Production Year:2017 | Volume:9 | Issue:4 Page(s): 137-154

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Title

THE EFFECT OF DIFFERENT GREEN MANURE CROPS AND NITROGEN SOURCES ON WEED BIOMASS AND SOME GROWTH CHARACTERISTICS OF CANOLA

Author(s)

DABIGHI KH. | FATEH E. | AYNEHBAND A. | Issue Writer Certificate

Keywords

BIOLOGICAL FERTILIZER NITROXINQ2

GRAIN YIELDQ1

LEAF AREA INDEXQ2

SUSTAINABLE AGRICULTUREQ2

Abstract

Background and Objectives: Canola (Brassica napus L.) is one of the main oil seeds. Type of canola nutrition is the effective factor on GRAIN YIELD, oil percent and quality. The application of green manure plants and biological fertilizer for reducing chemical fertilizer application and increasing yield approach is the main issue in order to SUSTAINABLE AGRICULTURE goals. Green manure crops are the plants that turned under all of the plant tissues for soil improvement aims. Weeds are one of the main factors for canola reducing yield. Weeds decreased canola GRAIN YIELD by decreasing plant height, LEAF AREA INDEX (LAI), the number of fertile flower and silique. So that, the aim of recent research is study the canola growth parameters and its LAI and weed biomass in canola fields under green manure crop and different nitrogen sources.Materials and Methods: This field experiment was conducted in experimental farm of Agricultural Faculty of Shahid Chamran University of Ahvaz in 2013-2014 growing season. This experiment was conducted in split plot arrangement with randomized complete block design in three replications. The treatments include different green manure crops including millet (Pennisetum sp), mung bean (Vigna radiate), barley (Hordeum vulgare), mixed cropping of Pennisetum sp and Vigna radiate and fallow (without green manure application) and subplot were different nitrogen sources at three levels includes (no nitrogen fertilizer (control), 100% chemical nitrogen and 50% chemical nitrogen + biological nitrogen fertilizer (Nitroxin). GRAIN YIELD was determined after margin removing by harvesting 2 m2 area from center of each plot and the plant samples were hand harvested. For measuring weed biomass and canola LAI sampling was done at three stages 50, 100 and 150 days after planting date that were in early stem elongation, flowering and anthessis phenological stages of canola, respectively with 0.5×0.5 m2 quadrate. The weeds sample weighted after drying and canola LAI was measured with photometric method and Leaf Area Meter Aparatus.Results and Discussions: The result showed that the highest GRAIN YIELD (4467.2 Kg ha-1) was related in mung bean and 50% chemical nitrogen + biological nitrogen fertilizer (Nitroxin) and the lowest (1434.2 Kg ha-1) was obtained at no nitrogen fertilizer and green manure treatment (control). Also, the highest biological yield 10401.5 Kg ha-1) was revealed at mung bean and millet intercropping and 50% chemical nitrogen + biological nitrogen fertilizer (Nitroxin). The lowest biological yield (3875 Kg ha-1) was obtained at control treatment. The weed results showed that the highest weed biomass (150.33 g m-2) was obtained at the first sampling date, fallow and no nitrogen application and the lowest one (23.34 g m-2) was related at the third sampling date, in 50% chemical nitrogen + biological nitrogen fertilizer (Nitroxin) and the intercropping of millet and mung bean.Conclusion: Application of green manure plants increased canola growth parameters due to reduction of weeds growth and their germination and increments of nutrient availability. Also canola growth increased with application of biological fertilizer (Nitroxin) which would be available soil nitrogen for canola than weeds. Also the results of this research showed that the green manure plants with chemical+ biological fertilizers caused to canola growth and LAI improvement and decreased weed biomass with reduction of chemical fertilizer application.

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APA: Copy

DABIGHI, KH., FATEH, E., & AYNEHBAND, A.. (2017). THE EFFECT OF DIFFERENT GREEN MANURE CROPS AND NITROGEN SOURCES ON WEED BIOMASS AND SOME GROWTH CHARACTERISTICS OF CANOLA. ELECTRONIC JOURNAL OF CROP PRODUCTION, 9(4), 137-154. SID. https://sid.ir/paper/135052/en

Vancouver: Copy

DABIGHI KH., FATEH E., AYNEHBAND A.. THE EFFECT OF DIFFERENT GREEN MANURE CROPS AND NITROGEN SOURCES ON WEED BIOMASS AND SOME GROWTH CHARACTERISTICS OF CANOLA. ELECTRONIC JOURNAL OF CROP PRODUCTION[Internet]. 2017;9(4):137-154. Available from: https://sid.ir/paper/135052/en

IEEE: Copy

KH. DABIGHI, E. FATEH, and A. AYNEHBAND, “THE EFFECT OF DIFFERENT GREEN MANURE CROPS AND NITROGEN SOURCES ON WEED BIOMASS AND SOME GROWTH CHARACTERISTICS OF CANOLA,” ELECTRONIC JOURNAL OF CROP PRODUCTION, vol. 9, no. 4, pp. 137–154, 2017, [Online]. Available: https://sid.ir/paper/135052/en

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