In recent years, many places have experienced a lot of fertilizers, crops are growing poorly, and the quality of agricultural products is declining. Through the practice in the Guanzhong area, long-term use of fertilizers to soil the soil. The key to scientific fertilization is the combination of chemical fertilizer and farmyard manure, improving soil physical and chemical properties, and improving soil microbial activity, thereby improving the quality of agricultural products. It is recommended that the masses apply scientific fertilization and not blindly fertilize. The following should be done:
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First, how to apply fertilizer The biggest advantage of farmyard manure is that the nutrient is comprehensive, the content is low, and the nutrient release is slow, so it should be applied early, usually applied once before the sowing; while the fertilizer has high nutrient content, less dosage and quick effect, generally should be The peak period of crop absorption and nutrient application is about 7 days.
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Application method: farmyard fertilizer should be used together with chemical fertilizer. The farmyard manure is combined with deep tillage and applied to the soil tillage layer, or ridges are buckled into the ridge bottom; when used together with farmyard manure, 30% of the fertilizer (nitrogen fertilizer) is used as the base fertilizer and 70% is used as the top dressing. Phosphate potassium fertilizer is put in one time.
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Second, the application of fertilizers and fertilizers should be based on organic fertilizers, and appropriate amounts of fertilizers such as nitrogen, phosphorus and potassium. Usually manure per 667 square meters is equivalent to 5000 kg 5 side, 15 kg or 40 kg urea, ammonium bicarbonate, phosphate diamine superphosphate 40 kg or 10 kg (12% content), potassium chloride 5-7.5 kg or ash 50-75 kg. The medium and high-fertilizer base fertilizer can be applied with 3000 kg, 15-20 kg of urea or 40-50 kg of ammonium bicarbonate, 15-20 kg of diammonium phosphate or 50-60 kg of superphosphate .
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3. How to scientifically fertilize crop nutrient imbalances not only lead to crop diseases, but also affect the quality and safety of agricultural products. The low quality of agricultural products is closely related to improper fertilization. In particular, partial application of nitrogen fertilizers aggravates the occurrence of diseases and implements soil testing and fertilization. Technology can coordinate the balance of crop reproductive growth and vegetative growth, promote the robust growth of crops, and improve and improve the quality of agricultural products. Excessive application of nitrogen fertilizer will lead to higher nitrate content in crops and lower quality indicators. Appropriate application of potassium fertilizer can significantly increase the content of sugar and vitamin C in vegetables and fruits . Scientific application of iron, manganese and zinc fertilizers can improve agricultural products. Â Â
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