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土地当量比是评价种植制度效果的重要指标，本文在综合分析了间混作群体土地当量比计算方法的基础上，界定了土地当量比的内涵，对土地当量比在不同作物群体中的计算方法进行了改进，使之可以评价任何作物群体的生产效果，同时对不同作物群体土地当量比的计算方法进行了实证分析，拓宽了其应用范围，为定量评价不同种植方式的生产效果提供了理论依据和实用方法。
The land equivalent ratio is an important index to evaluate the effect of cropping system. Based on the comprehensive analysis of the method of calculating land equivalent ratio among intercropping groups, this paper defines the connotation of land equivalent ratio, and makes the calculation of land equivalent ratio in different crop groups The improved method can evaluate the production effect of any crop group. At the same time, the calculation method of land equivalent ratio of different crop groups is empirically analyzed, which broadens its application range and provides a theoretical basis for quantitative evaluation of the production effects of different cropping systems. Practical methods.