PJB-2018-114
Response of cotton to tillage plus wheat straw management and nitrogen in wheat-cotton rotation
Dr.Niamat Ullah Khan
Abstract
Zero tillage plus straw retention and optimizing N fertilization are significant approaches to improve soil health and cotton yield in wheat-cotton system. A 3 years field experiment was conducted during 2013-2014, 2014-2015 and 2015-2016 to investigate the effect of two tillage techniques [zero tillage straw retained (ZTsr) and conventional tillage straw burnt (CTsb) and four N doses (0, 100, 150 and 200 kg ha-1) on cotton yield. Results indicated that bolls per plant, weight per boll, seed cotton yield; lint percentage and N recovery efficiency were highest at 150 kg N ha–1. Mean over years, tillage × nitrogen revealed that ZTsr had greater bolls count, bolls weight, seed cotton yield, lint % age and N recovery efficiency compared to CTsb. ZTsr had accumulated higher soil organic matter and total soil nitrogen compared to CTsb. ZTsr with 150 kg N ha–1 may be a sustainable and environmentally safe approach to increase cotton yield.
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