摘要
根据干旱年和平水年两年型的数据,研究了40个不同品种冬小麦之间的产量水分利用效率和氮素吸收利用之间的差异,结果表明,40个品种两年产量、水分利用效率、氮素生产效率、氮素利用效率和收获指数之间差异极显著,氮素生产效率平旱年平均为17.88 kg/kg,平水年为20.56 kg/kg,氮素利用效率和收获指数两年基本一致,分别为24.25%和81.75%,氮素生产效率和水分利用效率之间存在着正相关关系,决定系数R2为0.977 9***;根据氮素利用效率可将40个品种分为三大类,高氮素利用效率的5个品种平均27.50 kg/kg。
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
出处
《华北农学报》
CSCD
北大核心
2010年第3期180-185,共6页
Acta Agriculturae Boreali-Sinica
基金
国家科技支撑计划项目(2006BAD29B07)
甘肃省重大专项(0801NKDA105)
关键词
小麦品种
氮素
水分
利用效率
分类
Wheat varieties
Nitrogen
Water
Utilization efficiency
Classification
