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(1) The compound fertilizer has a variety of nutrient elements, the ratio of nutrient distribution is reasonable, and the fertilizer efficiency and utilization rate are relatively high. Although the chemical composition of the compound fertilizer is not as uniform as that of the compound fertilizer, the nutrient distribution ratio of the same compound fertilizer is fixed, and the compound fertilizer can be formulated into a series according to the nutrient status of different types of soil and the fertilizer requirement characteristics of the crop. Fertilizer, targeted, strong fertilizer effect, fertilizer utilization and economic benefits are relatively high.
(2) The compound fertilizer has certain compressive strength and particle size, good physical properties and convenient application.
(3) The compound fertilizer has complete nutrients, which can promote soil nutrient balance. Farmers are accustomed to apply more single fertilizers, especially partial nitrogen fertilizers, and rarely apply potassium fertilizers. The application of organic fertilizers is also less and less, which easily leads to imbalance of soil nutrients.
(4) Compound fertilizer is conducive to the popularization of fertilization technology. Soil testing and formula fertilization is a technically strong, demanding and extensive work. How to send this technology to thousands of households has always been a difficult problem to solve. Although the soil and fertilizer department can provide formulas to farmers through soil testing, farmers can purchase single-fertilizers for blending, but it is laborious and labor-intensive, and it is difficult to promote them in large areas. The formula fertilization technology through the special compound fertilizer as the materialized carrier, truly combines the technology, can better solve the above problems, thereby greatly accelerating the popularization and application of the formula fertilization technology.
Disadvantages: First, the nutrients contained at the same time, some nutrients may not coincide with the maximum fertilizer requirement period, easy to lose, it is difficult to meet the special requirements of nutrients in a certain period of the crop; second, the compound fertilizer with fixed nutrient ratio It is difficult to meet the requirements of various soils and various crops at the same time.
Compound fertilizers can be used as base fertilizers and top dressings. Different types of compound fertilizers should be selected for different crops and different soils.
1 Low-concentration compound fertilizers are generally used in crops with short growth periods and low economic value. Medium and high concentration compound fertilizers are suitable for crops with long growth period, large fertilizer demand and high economic value.
2 Sulfur-based compound fertilizers are generally suitable for dry soil and chlorine-sensitive cash crops. Chlorine-containing compound fertilizers are generally applied on rice fields, rainy areas and crops that are not sensitive to chlorine.
3 Compound fertilizers containing phosphorus nitrate should not be applied on slopes in paddy fields and rainy areas. The compound fertilizer containing calcium magnesium phosphate is suitable for application on acidic soil.
Advantages and application methods of compound fertilizer
The advantages of compound fertilizer are as follows:
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