【摘要】 本文根据杂草与作物在田间竞争所表现出的三大特征,应用幂函数与双曲线函数的复合模型(y=dr/(a+bd1))来模拟杂草密度与作物产量间的关系,通过对7组不同来源的杂草与作物竞争资料的模拟,证明幂双曲线函数复合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。为杂草的经济防除和进一步建立杂草防除的生态经济阈值模型提供科学的依据。更多还原

【Abstract】 The relations between weed density and crop yield was analysed by means of the composite function model.The analysis of 7 different source data of weeds competing with crops proved the actual biology significance of composite function model that can accurately describe 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.更多还原