近年来，农民争相施用复合肥。但是，由于复合肥各种营养元素比例固定，不能与各种作物所需要的营养元素相当，也不能与土壤中各种营养元素的含量丰缺互补。因此，不论什么地、什么作物都施用复合肥，有时不仅不能增产，反而还会破坏土壤。那么，如何正确使用复合肥？回、因土 In recent years, farmers competing to use compound fertilizer. However, due to the fixed proportion of various nutrient elements in compound fertilizers, they can not be equal to the nutrients needed by various crops or complementarily with the abundances of various nutrients in the soil. Therefore, no matter what, what crops are applied compound fertilizer, sometimes not only can not increase production, but will also destroy the soil. So, how to use compound fertilizer properly? Back, due to soil