长期以来,含氯化肥如氯化钾、氯化铵等,提倡优先施用于水稻、小麦、油菜、棉花、番茄等耐氯性强或中等耐氯作物上。对耐氯性弱的作物如烟草、甘蔗、葡萄、马铃薯、柑橘和瓜菜等,一般不施或在施用时严格控制其用量。但是,近些年有研究资料表明,即使是不宜施含氯化肥的一些作物,如马铃薯、甘蔗、地瓜、柑橘,在适当时期科学施用,产量和品质并不会受到影响。马铃薯在土壤有效钾含量低于100毫克/千克时,施用钾肥效果最好。钾素营养有利于糖分向 For a long time, chlorinated fertilizers such as potassium chloride, ammonium chloride, etc., to promote the priority given to rice, wheat, rapeseed, cotton, tomatoes and other chlorine-resistant or moderate chlorine-resistant crops. For non-chlorine-resistant crops such as tobacco, sugar cane, grapes, potatoes, citrus and vegetables, etc., generally do not apply or strictly control the amount of its application. However, in recent years, research shows that even some crops that are not suitable for applying chlorinated fertilizers, such as potatoes, sugarcane, sweet potatoes and citrus, will not be affected by scientific application during appropriate periods of time. Potato is most effective when potash is available at a soil available potassium level of less than 100 mg / kg. Potassium nutrition is conducive to sugar