Response of Some Bread and Durum Wheat Genotypes to Different Levels of Nitrogen in South West of Iran
Subject Areas : Journal of Crop Nutrition ScienceAtosa Enayat 1 , Shahram Lack 2 , Adel Modhej 3
1 - Department of Agronomy, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran.
2 - Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran.
3 - Department of Agronomy and Plant Breeding, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran.
Keywords: Nutrition, yield, Remobilization, Seed filling period,
Abstract :
In order to identify the effects of different levels of nitrogen fertilizer on seed yield andseed growth indices of some bread and durum wheat genotypes, a field experiment wasconducted in 2013-2014 in Khuzestan Agricultural and Natural Resource Research Center.The experiment was designed as a split plot with three replications. Nitrogen applicationrates (50, 100 and 150 kg N.ha-1) were assigned in the main plots and the subplots consisted of six wheat genotypes (Bread; Verinak, Star, Chamran and Durum;Karkheh, D-84-5, D-83-8). Results indicated that seed yield, seed protein percentage,seed effective filling rate, remobilization of dry matter and the current photosynthesis,1000 seed weight and seed effective filling period between genotypes were significant.Maximum and minimum seed filling rate was related to Karkheh genotype in 150 kgN.ha-1, and Verinak in treatment of using 50 kg N.ha-1. The effect of nitrogen levels onseed effective filling period was not significant. The maximum duration of seed fillingwas devoted to Verinak genotype and the minimum one was for Karkheh genotype.Chamran genotype, by using 150 kg N.ha-1, had maximum seed yield while Verinakgenotype, using 50 kg N.ha-1 had minimum seed yield. Maximum 1000 seed weight wasdevoted to Karkheh genotype in treatment of using 150 kg N.ha-1, also the minimum1000 seed weight was that of Star genotype in treatment of using 100 kg N.ha-1. Themaximum seed protein percentage was observed at D-84-5 line, in 150 kg N.ha-1, andminimum amount of protein was in Chamran and Karkheh in 50 kg N.ha-1. A positiveand significant correlation observed between seed yield and seed weight, the currentphotosynthesis rate and remobilization rate. In general, according to Khuzestan climateconditions, planting Chamran genotypes by using 150 kg N.ha-1, can led to an appropriateyield and it is highly suggested.
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