To this end, it is recommended that in the production of shed vegetables, fertilization should be "four combinations."
(1) Combination of topdressing and rushing fertilizers Select high-quality fertilizers. Based on multi-component compound fertilizer, the combination of topdressing and rushing is adopted to solve the problem of surface root fertilizer requirement. On the other hand, top dressing can activate soil layer, increase root system and alleviate fertilizer efficiency.
(2) Combination of organic and inorganic Many farmers, whether they are rushing or applying, are mainly based on chemical fertilizers. Although some fertilizers contain humic acid, the inorganic fertilizers are mainly nitrogen fertilizers such as ammonium nitrate and urea. They grow fast in the short term, the leaves are large, the stems are long, and the growth is good from the surface, but lacks long-term effects. Attention should be paid to the balance between vegetative growth and reproductive growth; some fertilizers are applied from cake fertilizer (hemp seed cake, cotton cake, bean cake) and diammonium phosphate (or ammonium nitrate), and other fertilizers such as potassium chloride and potassium sulfate. Poor because the cake fertilizer fermentation takes a certain amount of time.
(III) Combination of biological fertilizer and chemical fertilizer Biological fertilizer contains more than ten kinds of beneficial bacteria, which has the effect of activating soil and regulating nutrients. Combined with inorganic fertilizer (fertilizer), it can remove fertilizer damage, increase soil organic matter and promote root development.
(4) Combination of big water and small water flushing Many farmers use large water to fertilize both seedling stage and fruiting stage, which makes the fertilizer water too large, causing seedling disease, rotten roots and roots. Regardless of biological fertilizer, organic fertilizer, and chemical fertilizer, it is necessary to look at the fertilizer used for seedlings and use it reasonably. "Small fertilizer water roots, medium fertilizer water seedlings, big fertilizer water fruit" is the truth. If the fertilizer is used, the effect of cultivating the loose soil in a timely manner is better.
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