Although the compound fertilizer has the advantages of relatively complete nutrient content, good physical properties and convenient use, the types and contents of nutrient elements in different compound fertilizers are different. In order to fully exert the effect of compound fertilizer, the following should be considered when applying aspect:
1 Fertilizer nutrient morphology and composition: Nitrogen is divided into ammonium nitrogen and nitrate nitrogen. Ammonium nitrogen is easily adsorbed by soil and is not easy to be lost. It can be applied in both dry land and paddy fields. Nitrate nitrogen is easily lost in water. And denitrification denitrification loss, should be applied in dry land.
2 Soil nutrient abundance: The area of ​​potassium-deficient soil in the south of China is expanding continuously, while the effect of phosphate fertilizer is significant in most areas in the north; the soil in the south should be applied with nitrogen or potassium binary compound fertilizer or nitrogen, phosphorus and potassium ternary compound fertilizer. Nitrogen and phosphorus binary compound fertilizers should be used in the northern soil;
3 crop types: sang, tea, vegetables and other crops with stems and leaves need more nitrogen, high-nitrogen compound fertilizer should be used; rapeseed, cotton and other crops with seed-based crops need more phosphorus, optional High phosphorus compound fertilizer.
4 rotation method: in the northern wheat and corn rotation system, the wheat seedling stage is in the low temperature growth stage, especially sensitive to phosphorus deficiency, so high-phosphorus compound fertilizer varieties should be used; while the summer maize is high in temperature and soil release during growth There are relatively many phosphorus, so you can use low-phosphorus compound fertilizer.
1 Fertilizer nutrient morphology and composition: Nitrogen is divided into ammonium nitrogen and nitrate nitrogen. Ammonium nitrogen is easily adsorbed by soil and is not easy to be lost. It can be applied in both dry land and paddy fields. Nitrate nitrogen is easily lost in water. And denitrification denitrification loss, should be applied in dry land.
2 Soil nutrient abundance: The area of ​​potassium-deficient soil in the south of China is expanding continuously, while the effect of phosphate fertilizer is significant in most areas in the north; the soil in the south should be applied with nitrogen or potassium binary compound fertilizer or nitrogen, phosphorus and potassium ternary compound fertilizer. Nitrogen and phosphorus binary compound fertilizers should be used in the northern soil;
3 crop types: sang, tea, vegetables and other crops with stems and leaves need more nitrogen, high-nitrogen compound fertilizer should be used; rapeseed, cotton and other crops with seed-based crops need more phosphorus, optional High phosphorus compound fertilizer.
4 rotation method: in the northern wheat and corn rotation system, the wheat seedling stage is in the low temperature growth stage, especially sensitive to phosphorus deficiency, so high-phosphorus compound fertilizer varieties should be used; while the summer maize is high in temperature and soil release during growth There are relatively many phosphorus, so you can use low-phosphorus compound fertilizer.
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