First, look at the types of vegetables and fertilizers. Different types of vegetables require different amounts of nutrient elements, and leafy vegetables require large quantities of nitrogen. In addition to nitrogen, solanaceous fruits also require large amounts of phosphorus and potassium. Eggplant, tomato, and green pepper are all eggplants. Tomato needs more potassium than eggplant and green peppers. The root system of beans has a nitrogen-fixing effect, and nitrogen fertilizer can be appropriately used.
Second, see Fertility during the fertility period. Different fertility stages of the same crop require different types and quantities of nutrient nutrients, which should change with fertilization. Fruit vegetables need less fertilizer at the seedling stage, but require nutrient-rich, so the preparation quality of the nutrient soil at the seedling stage is the key to cultivating strong seedlings, and the absorption amount at the initial harvest period accounts for about 70% of the total fertilizer absorption amount. Therefore, it is necessary to chase the mixed fertilizer once.
Third, see the weather conditions topdressing. Fertilizer utilization changes with changes in temperature, moisture, and light conditions. At a suitable temperature and moisture, utilization is high when light is sufficient, otherwise utilization is low. Therefore, the top dressing should be filled with water as early as possible after sunny or warm weather.
Fourth, see the soil fertilization. Sandy soil has poor fertility retention capacity. Once the amount of fertilizer is too large, it will cause the loss of nutrients. It is necessary to adopt a fertility method that uses less meals and more meals. The viscous soil has a good fertilizer-holding ability. It can take one more fertilization and reduce the number of top dressings. save time.
Fifth, see fertilizer fertilization. The general agricultural fertilizer is used as the base fertilizer, and the human excreta and pig manure contain more nitrogen, which is suitable for the base fertilizer of leafy vegetables; the poultry manure contains more phosphorus and potassium, and it is better to make the base fertilizer of fruit and vegetable. Fertilizers and chemical fertilizers should be used together with nutrient content, such as over-soil and potassium sulfate. Base fertilizers and topdressing should also be used with reasonable nutrient types and levels. Such as the cultivation of tomato base fertilizer, nitrogen and phosphorus potassium with the appropriate, lack of calcium, calcium fertilizer will be added in top dressing, calcium deficiency tomatoes are easy to get the umbilical rot.
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