施肥的目的在于满足对各种养分的需要，增加产量，提高质量，培肥土壤，改善土壤理化性质。因此，一项施肥计划的制订应包括各种元素肥料的施用量和施用时期两项内容。１确定施肥量施肥量的确定是个十分复杂的问题，在确定施肥量时，最好采用栽培试验，找出科学用肥的最... The purpose of fertilization is to meet the needs of various nutrients, increase yield, improve quality, fertilize the soil, improve soil physical and chemical properties. Therefore, the development of a fertilization program should include the two elements of the amount of fertilizer and the application period of various elements of the fertilizer. 1  determine the amount of fertilizer to determine the amount of fertilizer is a very complex issue in determining the amount of fertilizer, it is best to use cultivation tests to identify the most scientific ...