1.种肥。作为种肥一般是预先将所施的化肥埋施在种子下部或侧下部,.肥料与种子应保持适当的距离,一般为3~5厘米,以避免烧伤种子。所以用作种肥的化肥,施肥深度以5~6厘米为宜。2.追肥。施追肥时植株根系已初步发育形成,如采用机械追肥,应尽量减少伤根,施肥深度不易太大,距植株的水平距离(侧距)也应适当。一般情况 Kind of fertilizer As a kind of fertilizer, the applied fertilizer is preliminarily buried in the lower part or the lower part of the seed, and the fertilizer and the seed should be kept at an appropriate distance, usually 3-5 cm in order to avoid the burn seeds. Therefore, as a kind of fertilizer fertilizer, fertilizer depth of 5 to 6 cm is appropriate. 2 top-dressing Topdressing plant roots have been the initial development of the formation, such as the use of mechanical top dressing, should minimize wounds, fertilization depth is not easy, the horizontal distance from the plant (lateral) should also be appropriate. generally