When the raw materials of compound fertilizer are different, we should pay attention to the application range of nutrients. Different brands and concentrations of compound fertilizers use different raw materials, so they should be selected according to soil types and crop types in production.
Nitrate-containing compound fertilizer is not suitable for leafy vegetables and paddy fields, and it is not suitable for saline-alkali land; Compound fertilizer containing potassium chloride or chloride ion should not be used in chlorine-free crops or saline-alkali land; Compound fertilizer containing potassium sulfate is not suitable for paddy field and acidic soil. Otherwise, it will reduce fertilizer efficiency and even poison crops.
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rational application of fertilizer
It is an important principle of rational fertilization to give full play to the role of fertilizer in increasing yield, to cooperate reasonably, to promote the cooperation between organic fertilizer and chemical fertilizer, and to cooperate with nitrogen and phosphorus.
Organic fertilizer is full of nutrients and slow in fertilizer efficiency; The concentration of chemical fertilizer is high and the effect is quick. In particular, organic fertilizer contains a lot of organic matter, which can form humus under the action of microorganisms, improve the soil structure, make it loose and soft, and have good air permeability, which is not only conducive to the growth and development of crop roots, but also helps to improve the soil's water and fertilizer conservation ability.
Chemical fertilizer can supply available nutrients needed by microbial activities, accelerate microbial reproduction and activities, promote the decomposition of organic fertilizer, release a large amount of carbon dioxide and organic acids, and facilitate the dissolution of insoluble nutrients in soil. Therefore, the combined application of organic fertilizer and chemical fertilizer can complement and adjust each other, and give full play to the functions of these two fertilizers.
Organic fertilizer generally has less nitrogen and more phosphorus, and generally reacts well with nitrogen fertilizer. When used in combination with phosphate fertilizer, it will affect the effect of phosphate fertilizer. Therefore, in addition to the special lack of phosphorus in the soil, the amount of organic fertilizer can be combined with a small amount of phosphate fertilizer. Generally speaking, it is best to apply organic fertilizer and phosphate fertilizer to different fields to give full play to the role of fertilizer.
Baidu encyclopedia-compound fertilizer
Baidu encyclopedia-organic fertilizer