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1980和1982年观察了适于不同条件下种植的9个大豆品种的根系。结果表明,大豆初生根系与后生根系的相对差异是植株对土壤不同层次水分及养分利用的生态适应性状。品种间初生根数及后生根数的差异均较明显,但后生根的差异为初生根的四倍。其干重也有相似变化。根据这些差异可把大豆品种分为初生根型、后生根型和中间型3种类型。其中初生根及后生根均较发达的中间型具有更广泛的适应性。在田间条件下,出苗后35～40天,即后生根开始从下胚轴分生时就显示出明显的品种类型差别。初生根型品种单位长度的下胚轴干重较后生根型品种大,但根冠比值较小。本文还对大豆根系的分类及命名进行了讨论。
The roots of nine soybean cultivars planted under different conditions were observed in 1980 and 1982. The results showed that the relative differences of primary and post-root system in soybean were the ecological adaptability of plants to different levels of water and nutrient use. The differences of root number and the number of aftergrowth of the varieties were all obvious, but the difference of the aftergrowth was four times that of the primary root. The dry weight also has similar changes. According to these differences, the soybean varieties can be divided into primary root type, epigenetic root type and intermediate type. Among them, the primary root and post-rooting are more widely adaptable than the more developed intermediate type. In the field conditions, 35 to 40 days after emergence, that is, after the hooting from the hypocotyls to show a clear distinction between the type of species. The root length of hypocotyls per unit length of newborn root type was higher than that of the later rooting type, but the ratio of root to shoot was smaller. This article also discussed the classification and naming of soybean roots.