Measures to Prevent and Control Soil Aging in Vegetable Garden
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2, scientific use of chemical fertilizers. To strictly control the amount of chemical fertilizers in particular to reduce the amount of nitrogen fertilizers. Elimination of blind fertilization, indiscriminate application of fertilizer, and partial application of nitrogen fertilizer. Fertilizers must be selected not only for nutrient content, but also for fertilizers with low impurity content, especially heavy metals and toxic substances, and high-purity fertilizers. In addition, fertilizers that do not acidify the soil should be used as much as possible depending on the soil conditions. Pay attention to the use of nitrogen, phosphorus, and potassium fertilizers to eliminate the phenomenon of partial nitrogen fertilizer. Pay attention to the use of trace element fertilizers, popularize nitrogen, phosphorus and potassium compound fertilizers and organic and inorganic compound fertilizers.
3, vigorously promote the application of organic fertilizer. Organic fertilizers not only have full nutrients, they have long-lasting and stable fertilizer effects, and they have large buffering capacity. They are also rich in organic matter, they can improve soil structure, and have little pollution to the soil environment of vegetable fields. To vigorously advocate the use of organic fertilizers, it is necessary to use sufficient quality of livestock manure and other manures that have been fully decomposed and treated by accumulation and fermentation. Application of local conditions to promote the technology of returning straw and green manure in vegetable fields, both to increase the source of fertilizer can also improve the soil.
4, emphasis on training and improve soil fertility. Take comprehensive treatment measures such as the scientific rotation of crops, dry crops, melons and vegetables; expand the cultivation of legumes; increase the application of organic fertilizers; establish standardized vegetable fields, strengthen irrigation and water conservancy construction, and reduce the water table. Seriously acidic fields should be improved by adding lime or applying soil conditioners or improving soil fertility.
5, reduce the poisonous material pollution vegetable field. Strictly forbid the use of garbage and sewage irrigation, in the field of high cadmium can be rotated with rice, the application of lime or calcium, magnesium fertilizer.