通过大豆断根处理后发根的解剖学观察,结果表明:大豆根的初生木质部为4原型,侧根发生于对着木质束的中柱鞘细胞;根茎转位区侧生根发生部位和过程与侧根相似;茎的不定根由射线薄壁细胞分化而成。断根处理与对照发根规律基本一致,不同断根处理根系形成有明显差异,适宜的断根处理可改善根系生长状态与吸收条件。 The results showed that the primary xylem of soybean root was 4 archetype and the lateral root occurred in the mesopian sheath cell opposite to the woody bundle. The rooting site and process of the rhizome transposing region were similar to those of the lateral root Adventitious roots of stems are differentiated by ray parenchyma cells. Root breaking treatment is basically the same as that of the control hair root. Different roots have obvious differences in root cutting treatment. Suitable root cutting treatment can improve root growth state and absorption conditions.