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The soil of clay is sticky and has strong ability to retain fertilizer and water, but the permeability is poor and the fertilizer efficiency is slow. Therefore, the application of organic fertilizer must be fully prepared for decomposing, and the application of chemical fertilizer should be appropriate early, and should be eaten more and eat less, and the number of fertilization should be reduced appropriately. Excessive application of nitrogen fertilizer should be avoided in the later period to prevent crops from being late. In addition, it is also necessary to dilute the loose soil and improve soil aeration.
Soil soil is a soil with good traits. Its permeability, storage and potential nutrient content are between sand and clay, suitable for the growth of various crops. Generally, it can be applied according to the production requirements and crops. Do a reasonable fertilization, fertilize the soil, and better play the effect of increasing the yield of fertilizer. In principle, long-acting fertilizer should be combined with short-acting fertilizer to meet the demand of fertilizer in different growth stages of crops; organic fertilizer and chemical fertilizer should be combined to fertilize soil, and use heavy fertilizer; large amount of element fertilizer combined with micro-fertilizer, timely crop Provide all the nutrients needed; nitrogen, phosphorus, potassium combination, mutual synergy.
The acidity and alkalinity of soil pH has great influence on the availability of nutrients, which is an important basis for rational fertilization. According to the analysis, the soil with pH value of 6~8 has higher available nitrogen content, so the application of ammonium nitrogen (such as ammonium bicarbonate, ammonium sulfate, etc.) should be carried out by point application, ditch application and deep application of base fertilizer. A method to prevent or reduce the volatilization of ammonia. In acidic soils with a pH of 6 or less, potassium and calcium are easily replaced by hydrogen ions and are lost with water. Therefore, in acidic soils, potassium and calcium should be added. The effectiveness of phosphorus is more susceptible to pH. When the pH is between 6 and 7.5, its effectiveness is higher. When the pH is above 7.5, it is easy to combine with calcium in the soil to become poorly soluble calcium phosphate. When the pH is below 6, it is easy to combine with iron, aluminum and the like in the soil to form a poorly soluble compound such as iron phosphate or aluminum phosphate. Therefore, in the application of phosphorus on acidic soil, lime should be applied first to neutralize the acidity of the soil.
High-efficiency fertilization of crops to see soil
The sandy soil has large sandy soil, loose soil, coarse grains, poor capillary performance, easy loss of fertilizer and water, and low potential nutrient content. This type of soil should be applied with organic fertilizers, such as soil and fertilizer, straw returning to the field, and gradually improve soil properties.
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