According to the climate
In recent years, due to the relatively simple farmland farming system, the use of land and the use of less land, the soil organic matter content has been declining year by year. This has led to an increase in fertilizer input and rising costs. In order to reduce the input cost of fertilizer, in accordance with the law of climate change, improving fertilization techniques is one of the effective measures to save costs and increase profits.
Use appropriate temperature, timely fertilization
Production practice shows that the crop's fertilizer absorption function gradually declines in the range of 0-32°C. For example, the optimum water temperature of rice is 30°C-32°C, and the optimum soil temperature for cotton is 28°C-30°C, barley 18°C, corn 25°C-30°C, and tobacco 22°C. Therefore, in the high temperature season, more organic fertilizer should be applied, appropriate amount of fertilizer should be applied, and fertilizer should be released with water. During the high temperature season, attention should also be paid to preventing “water and fertilizer peak†from meeting each other, leading to prolonged early crop growth and premature aging. In the cold season:
First, the semi-ripe organic fertilizer and the higher concentration of fresh water manure can be applied to the overwintering crop to provide heat during the decomposition process and increase the ground temperature;
Second, can increase the amount of phosphorus and potassium fertilizers, enhance the cold resistance of overwintering crops;
Use light intensity to increase photosynthetic efficiency
In different ecological areas, the total amount of annual radiation is different, generally 90-160 kcal, and more than 190 kcal. Agricultural production is to use light intensity to increase the leaf area coefficient of crops, to better absorb and produce nutrients, and to increase photosynthetic efficiency. therefore:
One should apply more nitrogenous fertilizer in places with good lighting conditions to promote vegetative growth and reproductive growth of crops. Where there are poor lighting conditions, less nitrogen fertilizer should be applied to prevent the maturity of crops.
Second, in the light is too strong, deep fertilization materials to prevent photolysis, volatilization;
Third, in the strong light, apply more phosphorus and potassium fertilizers, improve water use efficiency; Fourth, with the increase in the leaf area coefficient, appropriate fertilization materials, but should be applied in the morning and after 4 pm to reduce losses.
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