According to the nature of soil application of different fertilizers and the use of different fertilization methods called soil fertilization, the most basic and effective method is:
1. Soil fertility and fertilizer supply characteristics have a great influence on fertilization effects. All soils are relatively heavy, organic matter content is relatively high, and fertility is relatively strong. Even if more fertilization is applied once, nutrients will not be lost. On the contrary, if the soil is sandy and the content of organic matter is relatively small, then the fertility conservation capacity is correspondingly weaker. In the case of fertilization on this soil, the amount should not be too much at a time, and a small number of times should be used to avoid wastage of nutrients and waste. However, the characteristics of soil fertility are also different. Some fertility is long and stable. This soil is full of hungry, one fertilization can be more, the frequency can be less, and early-onset fields with prosperous and insufficient stamina, Attention should be paid to late-stage fertilization of crops, late-onset fields with a stagnant and lack of strength, and attention should be paid to late-stage fertilization of crops.
2. The amount of various nutrients in the soil is the main basis for determining which fertilizer to apply and how much to apply. The nutrient status in the soil is not only related to the parent material of the soil, but also has a direct or indirect relationship with the former. In general, if the former is a leguminous crop or a green manure, the nitrogen in the soil is more, and phosphorus and potassium fertilizers should be added. If the former crop is a gramineous crop (such as rice, wheat, etc.), the nutrient consumption in the soil is compared. In many cases, nitrogen, phosphorus and potassium should be added, especially nitrogen fertilizers.
3. The acidity and alkalinity of the soil will affect the effect of fertilization, and the applied chemical fertilizer will affect the acidity and alkalinity of the soil. Acidic soil should be selected alkaline fertilizers, such as ammonium bicarbonate, calcium magnesium phosphate, etc., alkaline soil should be selected acidic fertilizers, such as calcium superphosphate, ammonium sulfate, etc., so as to avoid the soil becomes too acid or alkali, there are It is beneficial to the absorption and utilization of nutrients by crops.
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