杂草密度与作物产量损失预测的一种新方法

A New Predicting Method of Weed Density and Crop Yield Losses

引入幂指函数模型［ｙ＝ ｙＬＭｅｘｐ（－ ｂｄｒ）］模拟杂草密度与作物产量间的关系，通过１０组不同来源的杂草与作物竞争资料的模拟，证明幂指函数模型具有实际的生物学意义，能准确地描述多种杂草和多种作物间的竞争关系，预测杂草为害作物可能造成的产量损失。为杂草的经济防除提供了一种新的研究方法。

The relations between weed density and crop yield was analysed by means of the power exponent model 〔 y = y LM exp(- bd r) 〕.The analysis of 10 different source data of weeds competing with crops proved the actual biology significance of power exponent model that can accurately describ the damage relations of various weeds and varied crops,and forecast the possible losses of crop yield made by weeds. It provided a new research method of economical prevention and control of weeds.