Soil texture has different clay soils. The organic matter is relatively rich, and the cultivated land has good water retention and fertilizer retention performance, but the soil permeability is poor, and the effect is slow after fertilization. Therefore, the applied organic fertilizer must be fully decomposed, the topdressing should be appropriate in advance, advocate the appropriate reduction of the number of fertilization, try to concentrate on multiple applications in the critical period of fertilizer demand, crops should not excessively apply nitrogen fertilizer to prevent crops "grey." Sand loam. The soil is loose and the water and fertilizer are easily lost. This kind of soil must pay attention to the application of organic fertilizer. Because it has a quick effect after fertilization, it should promote “less meals and more meals†when topdressing, and increase the number of fertilization in an appropriate amount. The amount of fertilizer should not be too much, avoiding waste and waste. Loamy soil. Between the clay soil and the sand, both have the advantages of both, according to the production requirements of the local climate crops and their growth and appearance, timely and appropriate fertilization.
The soil is “hot and coldâ€. The clay soil is a cold soil, the sandy soil is a hot soil, and the loam is a warm soil. The use of organic fertilizer should be chosen to increase its utilization. The sandy soil advocates the use of cold organic fertilizers such as cow dung, and the clay soil advocates the application of hot organic fertilizers, such as chicken manure, or cow dung that has been fermented and fermented. In addition, due to nitrate fertilizers (such as ammonium nitrate, potassium nitrate, etc.), an endothermic reaction occurs during the dissolution process to cool the soil, so it should not be used on the viscosity.
Soil pH is different According to the relevant data, the pH value of 7~8 is higher in the available nitrogen of alkaline soil. The application of ammonium nitrogen should pay attention to deep application to prevent its loss caused by volatilization. In an acidic soil with a pH of 6 or less, elements such as potassium and calcium are easily replaced by hydrogen ions and are lost with water. The effectiveness of phosphorus is more susceptible to soil acidity and alkalinity. When the pH value is 6~7.5, its effectiveness is higher. When the pH value is above 7.5, it is easy to combine with calcium in soil to form insoluble calcium phosphate; When the value is 6 or less, it is combined with iron and aluminizing to synthesize insoluble aluminum phosphate. Therefore, the preparation of the fertilizer should be considered in order to avoid unnecessary losses.
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