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《Acta Agriculturae Boreali-Sinica》 2010-03
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Study on the Difference of Nitrogen Uptake Effciency in the Different Wheat Varieties

ZHAO Gang1,WANG Shu-ying1,2,WANG Yong1,LI Shang-zhong1,TANG Xiao-ming1,ZHANG Jian-jun1,WANG Lei1,DANG Yi1(1.Gansu Academy of Agriculture Sciences,Lanzhou 730070,China;2.Key Laboratory of Northwest Drought-resistant Crop Farming,Lanzhou 730070,China)  
This study is based drought years and mid-year water,from studies of 40 different varieties of winter wheat,and the nitrogen-efficient varieties were selecte.the water use efficiency and nitrogen uptake and utilization,the difference was significant,the results showed that 40 varieties of two-year yield,water use efficiency,nitrogen productivity,nitrogen use efficiency and harvest index was significant difference,nitrogen productivity in drought years an average of 17.88 kg/kg,mid-year water year 20.56 kg/kg,nitrogen use efficiency and harvest index for two years basically the same,respectively 24.25% and 81.75%.There was a positive relationship between nitrogen productivity and water use efficiency,The coefficient of determination R2 =0.977 9***;under nitrogen use efficiency can be 40 varieties were divided into three major class,high nitrogen use efficiency in five varieties of goods were 27.50 kg/kg
【Fund】: 国家科技支撑计划项目(2006BAD29B07);; 甘肃省重大专项(0801NKDA105)
【CateGory Index】: S512.11
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