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把不同生态习性的作物从时间、空间及土层上布置在同一立地而形成的间套作系统,是利用了不同作物在小生境上的差异性,所以应尽量降低生态需求重叠所引起的不利竞争。环境资源对植物生长的限制作用可以从植株生物量的累积上表现出
Intercropping systems in which crops with different ecological habits are arranged in time, space and soil layers at the same site make use of the differences in niche characteristics of different crops. Therefore, the adverse effects caused by the overlapping of ecological needs should be minimized competition. The limiting effect of environmental resources on plant growth can be shown by the accumulation of plant biomass