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Effect of crop residue management and nitrogen fertilizer on grain yield and yield components of two barley cultivars under dryland conditions
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Abstract: (3819 Views) |
| To evaluate the effect of crop residue management and nitrogen (N) fertilizer rates on grain yield and its components in barley under dryland conditions, a field experiment was carried out at the college of agriculture, Shiraz University, Bajgah, Shiraz, Iran in 2007-2009 cropping cycles. The experiment was conducted as strip split plot arrangements in randomized complet block design with four replications. Horizontal plots were three crop residue rates (0, 750 and 1500 kg.ha-1), vertical plots consisted of two barley cultivars (Afzal and Reyhan), and sub-plots were three nitrogen rates (0, 40, and 80 kg N.ha-1). Number of spike.plant-1, grains.spike-1, and 1000-grain weight of both barley cultivars significantly increased with increased N and crop residue rates in both cropping cycles. The lowest grain yield was obtained from 1500 kg.ha-1 residue incorporation without N application indicating the soil N imbalance. The optimum crop growth and the highest grain yield (1459 and 1057 kg.ha-1 in cvs. Afzal and Reyhan, respectively) were obtained from the highest crop residue and N rates. Positive relationships were observed between grain yield and number of spikes.m-2, grains.spike-1, grains.plant-1, biological yield and harvest index. |
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| Keywords: : Barley, Grain yield, Nitrogen and Crop residue management. |
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Full-Text [PDF 179 kb]
(1534 Downloads)
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Type of Study: Scientific & Research |
Subject:
Special
Received: 2015/02/17 | Accepted: 2015/02/17 | Published: 2015/02/17
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