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《Journal of Agricultural University of Hebei》 2009-06
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Regulation effects of nitrogen amounts on yield and growth of wheat under water-saving irrigation

KE Xin,ZHAO Jin-feng,GUO Cheng-jin,MIAO Hong-ying,XU Zhen-long,XIAO Kai(College of Agronomy,Agricultural University of Hebei,Baoding 071001,China)  
Using cultivar Shimai12 and Shimai15 as the experimental materials,the regulation effects of nitrogen application amounts on yield and growth of wheat under water-saving irrigation were evaluated.The results indicated that the population culm number,LAI,and population dry weight under various growth stages increased with the increase of nitrogen amounts,so did the leaf chlorophyll contents,flag leaf fluorescent parameters,and flag leaf photosynthetic parameters.The spike numbers at maturity stage also increased with the increase of nitrogen amounts,but 1000 grain weight,and the yield showed a curve with one peak,with the highest at the mid-N(225 kg N/hm2) treatment.Therefore,in the wheat production with water-saving irrigation system,suitable nitrogen application amount should be determined for realizing the simultaneous improvement in yield,water and fertilizer use efficiency.
【Fund】: 河北省自然科学基金项目(C2008000325);; 国家粮食丰产科技工程项目(2006BAD02A08)资助
【CateGory Index】: S512.1
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