Optimum rate of nitrogen application and seed rate for deteriorated wheat (Triticum aestivum L.) |
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| Authors: | Hedieh Mosanaei Mohammad Reza Dadashi Abolfazleh Faraji Mohammad Pessarakli |
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| Affiliation: | 1. Agriculture Faculty, Agronomy Department, Gorgan Branch, Islamic Azad University, Gorgan, Iran;2. Horticulture and Agronomy Department, Golestan Agricultural and Natural Resources Research and Education Center, Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran;3. School of Plant Science, University of Arizona, Tucson, AZ, USA |
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| Abstract: | In order to study the effect of seed quality (SQ), seed rate (SR), and nitrogen rate (NR) on yield and yield components of wheat, an experiment was conducted as a factorial-split plot based on the randomized complete block design with four replications in Golestan Province, Iran. Treatments included the combination of SR and NR (recommended rate, 15 and 30% higher than the recommended rate) as the main plots, and SQ (control, 15, 30 and 45?h of accelerated aging) as the subplots. The interaction of NR?×?SR was significant on 1000-seed weight, seed yield, plant height, the number of seeds, biological yield, and harvest index. There was a significant reduction in all traits with an increase in seed aging. Seed yield had a significant and positive correlation with yield components. Using higher density and applying higher nitrogen fertilizer than those of recommended could reduce the negative effects of seed aging in wheat. |
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| Keywords: | biological yield harvest index regression seed aging spikelet |
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