Leaf Gas Exchange, Yield and Yield Components of Wheat (Triticum aestivum L. ) Cultivars as Affected by Plant Density

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Hosseinipour reza; VALADABADI SEYED ALIREZA; Mehrvar Mohammad Reza; Seifzadeh Saeed

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Journal: JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE) Year:2019 | Volume:13 | Issue:3 (51) Page(s): 431-446

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Title

Leaf Gas Exchange, Yield and Yield Components of Wheat (Triticum aestivum L. ) Cultivars as Affected by Plant Density

Author(s)

Hosseinipour reza | VALADABADI SEYED ALIREZA | Mehrvar Mohammad Reza | Seifzadeh Saeed | Issue Writer Certificate

Keywords

Stomatal conductanceQ1

Net photosynthetic rateQ1

Quantum yieldQ1

Leaf temperatureQ2

Grain yieldQ2

Abstract

Determination of optimal plant density is one of the main factors that may affect crop growth and seed yield when planting is performed in the plant residues especially in conservation tillage systems. To investigate the effect of plant density on leaf gas exchange of wheat cultivars, a field split plot experiment based on randomized complete blocks design with three replications was carried out at Karaj Research Farm of Seed and Plant Improvement Institute in Iran. In this study, the main factor was three levels at plant densities (400, 500 and 600 seed per m2) assigned to main plots and five wheat cultivars (Sivand, Sirvan, Pishtaz, Pishgam and Parsi) to sub-plots. Results of analysis of variance showed that transpiration rate (E) (p<0. 05), Stomatal conductance (Gs) (p<0. 01), Net photosynthetic rate (Pn) (p<0. 01) and Quantum yield (Qy) (p<0. 01), number of grain per spike (GPS), seed weight (SW), seed yield (SY), biological yield (BY) and harvest index (HI) were affected by plant density and cultivar significantly. In addition, interaction effect of plant density×cultivar was significant on Leaf temperature (LT) (p<0. 01), intercellular CO2 concentration (Ci) (p<0. 05) and biological yield (BY) (p<0. 01). The results also indicated that increment of plant densities of 400 to 600 seed per m2 decreased E, Gs, Pn and Qy. Increasing plant density decreased GPS and HI. The Pishgam cultivar had the highest E and Gs, while higher values of Pn, Qy and water use efficiency belonged to Parsi cultivar. The highest value of SY was obtained from Sirvan cultivar.

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APA: Copy

Hosseinipour, reza, VALADABADI, SEYED ALIREZA, Mehrvar, Mohammad Reza, & Seifzadeh, Saeed. (2019). Leaf Gas Exchange, Yield and Yield Components of Wheat (Triticum aestivum L. ) Cultivars as Affected by Plant Density. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), 13(3 (51) ), 431-446. SID. https://sid.ir/paper/182632/en

Vancouver: Copy

Hosseinipour reza, VALADABADI SEYED ALIREZA, Mehrvar Mohammad Reza, Seifzadeh Saeed. Leaf Gas Exchange, Yield and Yield Components of Wheat (Triticum aestivum L. ) Cultivars as Affected by Plant Density. JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE)[Internet]. 2019;13(3 (51) ):431-446. Available from: https://sid.ir/paper/182632/en

IEEE: Copy

reza Hosseinipour, SEYED ALIREZA VALADABADI, Mohammad Reza Mehrvar, and Saeed Seifzadeh, “Leaf Gas Exchange, Yield and Yield Components of Wheat (Triticum aestivum L. ) Cultivars as Affected by Plant Density,” JOURNAL OF CROP ECOPHYSIOLOGY (AGRICULTURE SCIENCE), vol. 13, no. 3 (51) , pp. 431–446, 2019, [Online]. Available: https://sid.ir/paper/182632/en

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