研究提出作物有效营养面积新概念,并建立了大豆植株个体营养面积与产量关系模型,优化解析出大豆有效营养面积为2837.5cm2,即有效株行距为53.3cm;大豆最佳营养面积为520.0cm2,即最佳株行距为22.8cm。并据此阐明目前我国北方垄作区广泛采用的67~70cm垄距已超过大豆有效株行距,造成土壤资源等浪费。垄作区若采用50cm左右垄距,平作区采用23cm×23cm株行距种植大豆,更有利于大豆群体产量的提高。 A new concept of effective crop area of ​​crop was put forward. The model of relationship between yield area and nutrition area of ​​soybean plant was established. The optimal nutrition area of ​​soybean was 2837.5cm2, that is, the effective row spacing was 53.3cm. The optimum nutrition area of ​​soybean was 520.0cm2, That is the best line spacing of 22.8cm. Based on this, it is clarified that the furrow spacing of 67 ~ 70cm widely used in the ridge area of ​​northern China now exceeds the effective spacing of soybean, resulting in waste of soil resources. Ridge area if the use of about 50cm Ridge Ridge, Ping for the use of 23cm × 23cm row spacing plant soybean, more conducive to soybean population increase.