冬小麦-夏玉米轮作条件下氮肥后效的定量研究

The Quantitative Study of Nitrogen Residual Effect Under Wheat-Corn Rotating System

通过田间试验结果研究了冬小麦一夏玉米轮作制度下,前茬小麦施氮肥对后茬夏玉米的残效。结果表明,前茬施肥对后茬作物有残效,并且残效随前茬施肥量的增加而增加。文中还讨论了氮肥残效的计算方法、残效指标以及包含残效的施肥决策。

This paper discussed the residual effect of nitrogen fertilizer applied in the presow Winter wheat season on the following corn according to data from field experiment with wheat-corn rotating sys- tem.The results suggested that the different rates of nitrogen fertilizer application in wheat had different effects on next corn and the residual effect increased as the rates of N fertilizer applied increased in wheat. The statistic methods for residual nitrogen effect,and residual index were also discussed.