EFFECT OF DIFFERENT NITROGEN LEVELS ON GRAIN YIELD, GRAIN PROTEIN CONTENT AND AGRONOMIC NITROGEN USE EFFICIENCY IN WHEAT GENOTYPES UNDER OPTIMUM AND POSTANTHESIS HEAT STRESS CONDITIONS

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MODHEJ A.; NADERI A.; EMAM Y.; AYENEHBAND AMIR; NOURMOHAMMADI GHORBAN

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Journal Paper

Paper Information

Journal: SEED AND PLANT PRODUCTION JOURNAL Year:2010 | Volume:25-2 | Issue:4 Page(s): 383-371

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Title

EFFECT OF DIFFERENT NITROGEN LEVELS ON GRAIN YIELD, GRAIN PROTEIN CONTENT AND AGRONOMIC NITROGEN USE EFFICIENCY IN WHEAT GENOTYPES UNDER OPTIMUM AND POSTANTHESIS HEAT STRESS CONDITIONS

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Keywords

WHEAT

NITROGEN

POST-ANTHESIS HEAT STRESS

AGRONOMIC NITROGEN USE EFFICIENCY AND PROTEIN CONTENT

Abstract

To study effects of different NITROGEN levels on grain yield, grain protein content and agronomic NITROGEN use efficiency in WHEAT genotypes under optimum and POST-ANTHESIS HEAT STRESS conditions, two separate field experiments were conducted in optimum and delayed sowing dates in Ahwaz, Iran in 2007 and 2008 crop cycles. The experimental site had a mild winter and dry and hot summer. Plants in delayed sowing date experienced heat stress during post-anthesis. Split-plot arrangement was corried out in a randomized complete block design with three replications in each experiment. The N application rates; 50, 100, and 150 KgNha-1 assigned to the main-plots. Sub-plots consisted of six bread and durum WHEAT genotypes. Results indicated that in both optimum and POST-ANTHESIS HEAT STRESS conditions, grain yield (GY) decreased significantly as NITROGEN level decreased. High temperature during grain filling period reduced the average of grain yield and TGW, 24% and 31%, respectively. Agronomic NITROGEN use efficiency (ANUE) reduced as the N level decreased. In POST-ANTHESIS HEAT STRESS conditions reduction in ANUE was 47.8% as compared with optimum conditions. The average grain protein content (GPC) was between 11-12.6% under optimum and between 12.6-13.8% under POST-ANTHESIS HEAT STRESS conditions. Higher rates of N fertilizer and also POST-ANTHESIS HEAT STRESS led to higher GPC. Grain protein yield per unit area increased by 9% under heat stress conditions as compared to optimum conditions. Low GY was associated with high GPC and low protein yield under POST-ANTHESIS HEAT STRESS conditions.

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APA: Copy

MODHEJ, A., NADERI, A., EMAM, Y., AYENEHBAND, AMIR, & NOURMOHAMMADI, GHORBAN. (2010). EFFECT OF DIFFERENT NITROGEN LEVELS ON GRAIN YIELD, GRAIN PROTEIN CONTENT AND AGRONOMIC NITROGEN USE EFFICIENCY IN WHEAT GENOTYPES UNDER OPTIMUM AND POSTANTHESIS HEAT STRESS CONDITIONS. SEED AND PLANT PRODUCTION JOURNAL, 25-2(4), 383-371. SID. https://sid.ir/paper/574770/en

Vancouver: Copy

MODHEJ A., NADERI A., EMAM Y., AYENEHBAND AMIR, NOURMOHAMMADI GHORBAN. EFFECT OF DIFFERENT NITROGEN LEVELS ON GRAIN YIELD, GRAIN PROTEIN CONTENT AND AGRONOMIC NITROGEN USE EFFICIENCY IN WHEAT GENOTYPES UNDER OPTIMUM AND POSTANTHESIS HEAT STRESS CONDITIONS. SEED AND PLANT PRODUCTION JOURNAL[Internet]. 2010;25-2(4):383-371. Available from: https://sid.ir/paper/574770/en

IEEE: Copy

A. MODHEJ, A. NADERI, Y. EMAM, AMIR AYENEHBAND, and GHORBAN NOURMOHAMMADI, “EFFECT OF DIFFERENT NITROGEN LEVELS ON GRAIN YIELD, GRAIN PROTEIN CONTENT AND AGRONOMIC NITROGEN USE EFFICIENCY IN WHEAT GENOTYPES UNDER OPTIMUM AND POSTANTHESIS HEAT STRESS CONDITIONS,” SEED AND PLANT PRODUCTION JOURNAL, vol. 25-2, no. 4, pp. 383–371, 2010, [Online]. Available: https://sid.ir/paper/574770/en

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