Improved vegetable soil measures
Due to growing vegetables all year round and using more chemical fertilizers, the aging, compaction, and serious diseases and insect pests in vegetable fields are degraded and the economic benefits are declining. Therefore, it is very important to improve the soil of vegetable fields. The following five measures can be taken: 1. Add organic fertilizer. After adding organic fertilizer, the factors such as water, fertilizer, gas, heat and bacteria in the cultivation layer are harmonized and unified. This not only creates an excellent environment with suitable temperature, humidity, and complete fertilizer for the growth of the roots, stems and leaves of the seedlings, but also effectively Improve soil properties. 2. Deep plowing. With the application of organic fertilizers, the cultivating layer is gradually deepened so that the depth of the tilling layer can reach 30 cm or more. At the same time, the use of winter frozen soil, summer and autumn sunburn, promote soil maturity, improve soil fertility. In addition, it is necessary to diligently plan and activate the soil so that the air permeability of the soil is good. After the vegetables are planted, they should be slaughtered every 3-5 days, and the depth should be 3-5 cm. 3. Rotation of land. Rational rotation of different varieties of vegetables, such as leafy vegetables with more nitrogen, fruit and vegetables with more phosphorus, and stem vegetables with more potassium, should be used for rotation; deep-rooted beans, melons, Solanaceous fruits are planted with shallow-rooted Chinese cabbage, cabbage, cucumber, and onion and garlic, which can make full use of various nutrients contained in soil and nutrients in different soil layers, and gradually improve fertility and reduce germs. Harmful accumulation of harmful substances. 4. Apply biofungus fertilizer. After a long period of continuous cropping of vegetables, harmful microorganisms in the soil are accumulated, and beneficial microorganisms are reduced. After the application of biological bacterial fertilizers, beneficial microorganisms in the soil can be increased, which can play a role in improving the soil. 5. Reasonably water. Drip irrigation has the function of protecting the soil. It slowly infiltrates the soil, which can avoid the erosion of the soil surface caused by the flood irrigation and reduce the destructiveness of the soil tillage.
romatographic and use double-antibodyromatographic and use double-antibodysandwich method to detect antigen. Whenthe concentration of antigen in specimen ishigher than the minimum detection limit, theviral antigen will form complexes withlabeled antibodies first. Under chromatogra-phy, the complexes move forward along thenitrocellulose membrane till captured bypre-coated monoclonal antibody ofindetection zone.Through the visible color tointerprete the test results.
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