Compound fertilizer has comprehensive nutrients, and scientific selection and application are key

Compound fertilizer refers to fertilizer made by processing and mixing two or more single-element fertilizers or compound fertilizers, usually containing at least two of the three major nutrients nitrogen, phosphorus and potassium. Compared with compound fertilizer produced mainly through chemical reactions, compound fertilizer is mostly based on physical blending, and its nutrient combination is relatively flexible, so the formula can be adjusted according to soil conditions and crop needs.

In terms of categories, common types include NPK compound fertilizer, organic-inorganic compound fertilizer, and special compound fertilizer designed for specific crops. By process, it can also be divided into granulated compound fertilizer and blended fertilizer, among which blended fertilizer is also called BB fertilizer and is made by directly blending several granular fertilizers in proportion; different types differ in nutrient form and release characteristics.

The main advantage of compound fertilizer is that its nutrients are relatively comprehensive. A single application can supplement multiple nutrients at the same time, reducing the number of topdressings and saving labor. It can be used as both base fertilizer and topdressing, and is relatively common in field crops, vegetables and fruit trees.

Before use, an appropriate nutrient ratio should be selected according to soil fertility and crop type, so as to fertilize according to the soil and the crop. When purchasing, check the nutrient content, implementation standard and registration information marked on the packaging to avoid buying products with unclear labeling. When fertilizing, also be careful not to let the fertilizer come into direct contact with seeds or roots, and master the depth and distance well to avoid burning seeds and roots.