Title: Effect of Seeding Rate on Winter Wheat Yield and Soil Water Dynamics under Straw Mulching on Dryland
Abstract: The objective of this research was to investigate effects of different seeding rates on soil water storage,development of winter wheat population,grain yield and water use efficiency under straw mulching and conventional conditions on dryland in Weibei Plateau from June 2012 to June 2013.The results showed that water storage at 0-3.6msoil layer was 105 mm higher under straw mulching than under conventional treatment at wheat sowing time,which was used by wheat after the jointing stage.In addition,wheat population size before heading stage was significantly influenced by seeding rate,but no differences were observed after heading.Wheat grain yield ranged from 2 841kg/hm2 to3 496kg/hm2,both seeding rate and mulching had no prominent effects on grain yield.However,a significant lower harvest index was observed under high seeding rate than middle and low seeding rates.The water use efficiency was lower by 11% under straw mulching than under conventional,which due to the significant higher water use by 20%.Therefore,seeding rate and mulching had no pronounced effects on wheat yield under tested weather condition,further studies are needed to comprehensively evaluate these effects under other weather conditions to establish rational managementpractice for dryland wheat.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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