the effects of crop residue and nitrogen rates on grain yield and its components in two dryland wheat cultivars

Authors

حسین صادقی

محمد جعفر بحرانی

عبدالمجید رونقی

محمد حسین رئوفت

علی اکبر کامگار حقیقی

abstract

a field study was conducted at the college of agriculture, shiraz university, shiraz, iran to evaluate the effect of different crop residue and nitrogen rates on yield and yield components of two dryland wheat (triticum aestivum l.) cultivars. the experiment was conducted as a strip split plot with four replications. vertical plots included two dryland current wheat cultivars (azar2 and nicknejad), while the horizontal plots constituting crop residue rates (0.500 and 1000 kgha-1) and sub-plots the three n rate (0.35, and 70 kg n ha-1) treatments. results indicated that when crop residue completely returned to the soil (100 %), n return rates should be proportional to residue rate. fertile spike no. per plant, grains per spike, grains per plant and 1000-grain weight significantly increased (p

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