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作物的单位面积产量是单株生产力的总和。单株生产力和群体生产力是互相矛盾的。单位面积上株数越少,单株生产力越高,但单株生产力不能无限制地增加;单位面积株数越多,单株生产力越低,但单株生产力的降低是无限的,甚至可达到零(极度密植,造成空秆空株)。高产是单株生产力和群体生产力调整到恰到好处——即矛盾得到统一的结果。合理密植包括两方面的内容,即单位面积株数和植株分布情况,这二者都会影响单株生产力。
Crop yield per unit area is the sum of plant productivity. Plant productivity and group productivity are contradictory. The smaller the number of plants per unit area, the higher the productivity per plant, but the productivity per plant can not be increased indefinitely. The more plants per unit area, the lower the productivity per plant, but the reduction of plant productivity is limitless, Extremely close planting, resulting in empty stalks empty strains). High yield is just right to adjust individual productivity and group productivity - that is, the result of a unified contradiction. There are two aspects to rational density planting, that is, the number of plants per plant and the distribution of plants, both of which will affect plant productivity.