植物的根千差万别.一般来讲,植物地下部分所有根的总称为“根系”.从起源分,一般可分为定根和不定根两大类.定根即是指种子萌发后,由胚根发育成的根(包括主根和侧根).不定根是指从茎、叶或胚轴上产生出来的根,如小麦、水稻等的根.从形态上看,植物根系一般区分为直根系和须根系两类.如大豆、棉花等双子叶植物和裸子植物的根系,中央有一垂直入土的主根,主根又生出许多侧根,侧根再生侧根,这就组成直根系.水稻、小麦等禾本科植物及多数其他单子 Generally speaking, all the roots of the plant underground parts collectively referred to as the “root system.” From the origin of points, can be divided into fixed root and adventitious root two categories. Rooted refers to the seed germination, the radicle development (Including the main root and lateral root.) Adventitious root is stems, leaves or hypocotyl generated from the roots, such as wheat, rice, etc. From the morphological point of view, the plant roots are generally divided into straight root and fibrous root system two Such as soybean, cotton dicotyledonous plants and gymnosperms root, the center has a vertical rooting of the main root, the main root and a lot of lateral roots, lateral root regeneration side, which formed the root system. Rice, wheat and other grasses and most other list