After the spring, another fertilizing season was reached. Farmers' friends should pay attention to the following points when selecting and using compound fertilizers:
The compound fertilizer has a long effect and is easy to be used as a base fertilizer. It is not suitable for the seedling fertilizer and middle-late-stage fertilizer, and it avoids greediness.
The decomposition of compound fertilizer is slower, and attention should be paid to use with simple nitrogen fertilizer. The amount of nitrogen fertilizer is less at the seedling stage of the crop. Therefore, for the crop that uses compound fertilizer as the base fertilizer at the time of sowing, the available nitrogen fertilizer should be added in time for topdressing according to the fertilizer requirement law of different crops to meet the nutritional needs of the crop. The difference in compound fertilizer concentration is relatively large. Care should be taken to select the appropriate concentration. It is necessary to use economical and efficient compound fertilizers because of different regions, soils, and crops. Generally high-concentration compound fertilizers are used in economic crops.
The compound fertilizer has a high concentration to avoid direct contact with seeds or fertilizers or to use mixed fertilizers. Compound fertilizer has high nutrient content. If it is in direct contact with the roots of seed or seedlings, it will affect sprouting and even burning seedlings and rot. When sowing seeds, the seeds should be applied with a hole, apply compound fertilizer about 5-10 cm away, avoid direct and seed with the same hole, resulting in fertilizer damage.
Compound fertilizers with different raw materials, should pay attention to the use of nutrients. Nitrate-containing compound fertilizers should not be used in leafy vegetables and paddy fields; compound fertilizers containing ammonium ions should not be applied on saline-alkali soils; compound fertilizers containing potassium chloride or chloride ions should not be used on chlorine-tolerant crops or saline-alkali soils; Compound fertilizers containing potassium sulfate should not be used in paddy fields and acidic soils. Otherwise, it will reduce the fertilizer effect.
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