农作物的产量可以按单株来计算,但更主要的是按单位土地面积来计算。在一块大田里,植株与植株之间互相发生影响,尤其在密植的情况下,互相影响更大,形成一个作物的群体。群体的产量,亦即通常所称的产量,由构成这个群体的单株(即个体)产量所构成。所以一定要个体发育得好。群体的产量才能高。但是,群体的产量,并不是个体产量简单的相加。许多试验指出:高额的单位面积群体产量,往往是由较多的比稀植时较弱的个体所构成的,而不是组成群体的单株的最大产量的 The yield of crops can be calculated on an individual basis, but more importantly, the unit area of ​​land is used for calculation. In a field, plants and plants influence each other, especially in close planting situations, affecting each other more to form a crop group. The yield of a population, that is, the so-called yield, consists of the yield of the individual (ie, individual) that makes up this population. So be sure to develop well. The production of a group can be high. However, the output of the group is not a simple sum of the individual’s production. Numerous experiments have pointed out that high yields per unit area group tend to consist of more individuals than weakest individuals at the time of planting, rather than the maximum yield of individual plants that make up the population