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我们曾研究了大豆品种根系的生态类型,指出大豆初生根与后生根间的相对差异是个对土壤不同层次水分及养分利用的生态适应性状。根据这种相对差异可分为初生根型、后生根型、中间型三种,其中初生根和次生根均较发达的中间型具有更广泛的适应性。显然,这对于培育适应性广的品种有一定的意义。但在植株生长后期取根观察,无法使地上部恢复生长和获得籽粒。我们曾观察到,在田间条件下,播种后35—40天,
We have studied the ecological types of soybean root system, pointed out that the relative difference between the primary and post-rooting of soybean is an ecological adaptation to different levels of soil moisture and nutrient utilization. According to this relative difference can be divided into primary root type, after root type, intermediate type, of which the primary root and secondary root more developed intermediate has a wider adaptability. Obviously, this is of great significance to cultivate a wide range of adaptable varieties. However, observation of the roots at the later stage of plant growth failed to restore the shoots and obtain the grain. We have observed that under field conditions 35-40 days after sowing,