复合肥具有养分含量高、物理性状好、使用方便等优点,对于平衡施肥,提高肥料利用率,促进作物的高产稳产有着十分重要的作用。但它也有一些缺点,比如它的养分比例固定,与不同土壤、不同作物所需的营养元素种类、数量和吸收比例不一定相符等。因此,使用前最好进行测土,了解田间土壤的质地和营养状况,科学对各养分进行配比才能得到更好的效果。 Fertilizer with high nutrient content, good physical properties, easy to use, etc., for balanced fertilization, improve fertilizer utilization, and promote high-yield stable crop has a very important role. But it also has some shortcomings, such as its fixed proportion of nutrients, with different soil, different types of crops required nutrients, quantity and absorption ratio does not necessarily match. Therefore, it is best to soil test before use to understand the soil texture and nutritional status of the field, the scientific ratio of nutrients to get better results.