First, the benefits of using chemical fertilizer with organic fertilizer
1. Fertilizers such as superphosphate, trace elements, etc. can be improved, and they are fixed in the soil and become ineffective after being applied to the soil. When used in combination with organic fertilizers, it reduces the contact surface with the soil and reduces the fixing of nutrients. Organic fertilizers can also increase the solubility of phosphate rock and are better under paddy conditions. After many fertilizers are mixed with organic fertilizers, fertilizers can be absorbed by organic fertilizers to reduce losses. In addition, organic fertilizer with organic fertilizer can also promote the maturity of organic fertilizer, improve fertilizer efficiency. Experiments have shown that the use of chemical fertilizers in combination with organic fertilizers can both reduce the soil redox potential and reduce ammonia nitration, as well as reduce the loss of nitrogen. Generally can improve nitrogen fertilizer utilization by 10% to 15%.
2. It can reduce some of the unfavorable side effects that chemical fertilizers may produce. When applying larger quantified fertilizers or unequal application of chemical fertilizers alone, the concentration of soil solution is high, affecting crop water absorption and even injuring roots. If it is mixed with organic fertilizers, this will not happen. problem. In addition, if the physiological acid fertilizer is applied alone for a long period of time, the soil will become acid, and excessive active iron, active aluminum and other harmful substances will be generated, and the crop will be poisoned. In combination with organic fertilizers, soil buffering performance can be increased and soil acidification can be prevented. Another example is that some superphosphates contain too much free acid, which can affect seed germination and seedling growth when used as a seed fertilizer. Neutralization of free acid after adding organic fertilizer can reduce the damage to seeds.
3. Can increase the nutrient content of the crop nutrient organic fertilizer is more complete, fertilizer effect is stable and long, contains many organic matter, can increase soil organic matter content, improve soil physical and chemical properties. Not only can supply crops, but also can supply soil microorganisms with nitrogen, phosphorus, potassium and other nutrients, as well as vitamins and growth hormone. After the application of organic fertilizer, soil enzyme activity is enhanced, which is conducive to nutrient conversion. Such as organic fertilizer mixed with superphosphate or superphosphate magnesium fertilizer can promote the growth of aerobic bacteria in the soil, increase crop nitrogen nutrition. According to experiments, the use of chemical fertilizers with organic fertilizers for three years is higher than that of single fertilizers with organic matter content of 0.08%-0.11%, ammoniated bacteria is increased by 260%, aerobic nitrogen-fixing bacteria is increased by 119%, and cellulolytic bacteria are increased by 600%. %.
4. When straws are returned to farmland and unfertilized organic fertilizers are used, adding chemical nitrogen fertilizer can avoid the slow supply of crops due to early nitrogen deficiency and affect the growth. Moreover, at the same time, the maturity phase of cereal crops requires simultaneous supply of nitrate nitrogen and ammonium. Nitrogen and organic fertilizers can do this.
Second, the use of fertilizer and organic fertilizer requirements
1. Grasp the application time Organic fertilizer has a large quantity and slow effect. It should be applied as early as possible. Normally, it should be applied once before sowing; but the amount of chemical fertilizer is small and the effect is quick. It should generally be applied about 7 days before the crop needs fertilizer. .
2. Grasp the method of application Organic fertilizers should be applied to soil tillage in combination with deep tillage. Nitrogen fertilizers used with organic fertilizers should be used as base fertilizers or top dressings, and phosphate fertilizers can be used as base fertilizers together with organic fertilizers.
3. Control the amount of fertilization Fertilizer is used in combination with organic fertilizer. The amount of fertilizer can be different depending on the crop and soil fertility. Such as rice, in low fertility soil, organic fertilizer can be applied per acre 1000 to 1500 kilograms, urea 10 to 15 kilograms, compound fertilizer 40-45 kilograms, potassium chloride 10 to 12 kilograms; in medium fertility soil, per acre can Application of organic fertilizer 500 ~ 1000 kg, urea 8 ~ 10 kg, 35 ~ 40 kg of compound fertilizer, potassium chloride 8 ~ 10 kg; in high fertility soil, can be applied per acre 500 kg of organic fertilizer, urea 6 ~ 8 kg, 35 to 40 kg of compound fertilizer and 6 to 8 kg of potassium chloride.
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