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欲实现适量播种、合理密植的目标,首先必须要明确植物的田间合理密度。田间合理密度主要决定于株高、冠幅和根幅。一般株高越高、冠幅和根幅越大,则田间合理密度越小;反之,株高越低、冠幅和根幅越小,则田间合理密度越大。种植目的亦是影响田间合理密度的重要因素。种子生产的田间合理密度显著低于营养体生产。饲料和绿肥草地以高生物产量为目标,田间合理密度通常低于果园和水土保持草地。土壤肥力影响田间合理密度,肥力低的土地田间合理密度亦低。
In order to achieve the goal of proper sowing and reasonable density planting, we must first make sure the reasonable density of plants in the field. The reasonable field density mainly depends on plant height, crown width and root width. The higher the general plant height, the larger the crown width and root width, the smaller the reasonable density in the field. Conversely, the lower the plant height and the smaller the crown width and the root width, the larger the reasonable density in the field. The purpose of planting is also an important factor affecting the reasonable density of the field. The reasonable field density of seed production was significantly lower than that of vegetative body production. Feed and green manure grassland are targeted at high biomass production and the reasonable field density is generally lower than in orchards and soil and water conservation grasslands. Soil fertility affect the reasonable field density, low fertility of the field is also a reasonable low density.