How to Fertilize "Green" Vegetables

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Mainly organic fertilizer, supplemented by other fertilizers; mainly basal fertilizer supplemented by top dressing; mainly full multi-element compound fertilizer, supplemented by single element fertilizer.

1 fertilization type

1) Organic fertilizer. High-quality organic fertilizer has the advantages of long-term fertilizer efficiency, stable fertilizer supply, and low fertilizer damage. Common compost, manure, biogas fertilizer, cake fertilizer, green manure, mud fertilizer, and crop straw are common advantages.

2) Fertilizer. The production of green vegetables is restricted in principle by the application of chemical fertilizers, and scientific application is required during the production process. The fertilizers that can be used for green vegetable production include urea, diammonium phosphate, potassium sulfate fertilizer, calcium magnesium phosphate fertilizer, mineral potassium, and superphosphate.

3) Biological bacterial fertilizer. Biofertilizer has both the long-term effect of organic fertilizer and the immediate effect of chemical fertilizer, and can reduce the cumulative nitrate content in vegetables, improve the quality of vegetables, improve the soil, such as rhizobia fertilizer, phosphorus bacteria fertilizer, active potassium fertilizer, azotobacter Fertilizers, silicate bacterial fertilizers, composite microbial fertilizers, and humic acid fertilizers.

4) Inorganic mineral fertilizers. Such as mineral potassium fertilizer, mineral phosphate fertilizer and so on.

5) Trace element fertilizers. With copper, iron, zinc, manganese, boron and other trace elements as the main fertilizer.

2 Principles of fertilization

1) Reapply organic fertilizer and reduce chemical fertilizer. Adequate organic fertilizer can continuously supply the nutrients needed for the whole growing period of the vegetables, which will help improve the quality of the vegetables. Crop straw and livestock manure should be added to the starter through high temperature accumulation and fermentation, so that it can be fully cooked before applying it to the vegetable field. During the fermentation, fresh feces can be put into plastic bags, stacked in a plastic bag or filled in a hot water bottle, and then naturally fermented at an ambient temperature of 15° C. or more, and the temperature during the fermentation process should be maintained at about 45° C. Crop stalks can be directly returned to the field with the addition of fast rot, but the effect of comminuted rot is better. The method of heap rot is to add 1 to 2 kg of fast rot per 100 kg of comminuted straw. After stacking, the surface is tightly sealed with mud. Normally, it can become fat in about 20 days.

2) Reapply base fertilizer and apply less fertilizer. Green vegetable production should be applied to basal fertilizer to control top dressing, usually every 667 m. Pure nitrogen 15kg, 2/3 for basal, 1/3 for top dressing, should be deep.

3) Pay attention to the scientific application of chemical fertilizers. The first is to prohibit the application of nitrate nitrogen fertilizer. The second is to control the amount of chemical fertilizers. In general, the amount of nitrogen applied per 667 m2 (pure nitrogen) should be controlled within 15 kg. The third is to deepen and apply early. Ammonium nitrogen fertilizer applied to the soil below 6 cm, urea was applied to the soil below 10 em. Early application is beneficial to the early and long-term growth of crops, prolonging fertilizer efficiency and reducing nitrate accumulation. Practice has proved that after certain treatment before urea application, it can quickly improve fertilizer efficiency and reduce pollution in the short term. The method is: Take 1 part of urea, 8 to 10 parts of soil suitable for dry and wet, mix evenly and then pile up in a dry room, cover the plastic film on the cover, heap dull for 7 to 10 days can be used as a top dressing fertilizer. The fourth is to cooperate with organic fertilizers and microbial fertilizers as much as possible.

4) Fertilization should be accurate and reasonable. Different geology, different seedlings, different types of fertilization in different seasons, and fertilization methods will be different. Low-fertilizer vegetable plots can be treated with nitrogen and organic manure to cultivate fertility; vegetable nitrogen at the seedling stage is conducive to early and long-lasting vegetables; high temperatures in summer and autumn, high nitrate reductase activity is not conducive to the accumulation of nitrate, can be applied in an appropriate amount Nitrogen fertilizer.

3 New Fertilization Method

1) Spray brown sugar (white sugar) liquid. Spray 0.2%~O on leafy vegetables. The 3% brown sugar solution can increase the leaf size, increase the chlorophyll content, and increase the disease resistance of plants. Generally, it can increase production by about 10%. Note that the concentration of sugar can not be too high, spray once every 5 to 7 days, and even spray 3 to 5 times.

2) Foliar sprayed with vinegar. Solanaceous vegetables after planting 1 to 2 days, sprayed once every 5-7 days 400 times rice vinegar solution, and even spray 3 to 5 times, can increase the yield of vegetables by 10% to 20%. Generally choose to use on sunny afternoons, every 667 mz need vinegar liquid 40 ~ 50 kg.

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