土豆属高淀粉块茎作物,生育期分苗期、块茎形成与增长期、淀粉积累期。土豆在整个生育期中,吸收钾肥最多,氮肥次之,磷肥最少。因此,施肥技术应遵循以农家肥为主、化肥为辅,基肥为主、适当追肥的原则。重施基础土豆是块茎作物,喜欢疏松的沙性土壤。基肥用量一般占总施肥量的2/3以上,基肥以充分腐熟的农家肥为主,增施一定量的化肥,特别是磷钾化肥作基肥,这样能改善土壤的物理性质,有利于土豆生长和结薯。基肥中氮肥用量约占50%,施用方法是在种植前沟施或穴施,深15厘米左 Potato high starch tuber crops, seedling stage of growth period, tuber formation and growth stage, starch accumulation period. Potatoes throughout the growing period, uptake of potassium, nitrogen followed, phosphate at least. Therefore, the fertilization technology should follow the principle of mainly manure, fertilizer supplemented, basal fertilizer, appropriate top dressing. Re-application of basic potato tuber crops, like loose sandy soil. The amount of basal fertilizer generally accounts for more than two-thirds of the total amount of fertilizer, basal fertilizer to full maturity of farmyard, the increase of a certain amount of fertilizers, especially phosphorus and potassium fertilizer as basal fertilizer, which can improve soil physical properties conducive to potato growth And knot tubers. The amount of nitrogen fertilizer in the basal fertilizer accounts for about 50%, and the application method is to apply or apply before planting a depth of 15 cm