When winter arrived, when the author guided the production of Vegetables in the greenhouse, he found that many farmers used fertilized materials to work hard, causing large amounts of soil, resulting in soil compaction, rotted roots, roots, and wilting plants, which seriously affected the economic efficiency of greenhouse vegetables. . According to the author's many years of practical experience, it is suggested here that the greenhouse vegetable fertilization should accomplish the following four points:
(a) The combination of organic fertilizer and inorganic fertilizer. Many farmers rely on chemical fertilizers, whether they are rushing or applying. Although some fertilized fertilizers contain humic acid, inorganic fertilizers mainly include nitrogen fertilizers such as ammonium nitrate and urea. In the short term, the vegetables grow well, but they lack long-term effects. There are also some red-fertilizer cakes (hempseed cakes, cotton cakes, bean cakes) and diammonium phosphate (or ammonium nitrate). The effect is unfavorable due to the time required for cake fat fermentation.
(b) Combination of chase and fertilization. The fertilizer is mainly composed of multiple compound fertilizers, and the combination of topdressing and flushing is adopted. On the one hand, the problem of surface roots need fertilizer is solved. On the other hand, top dressing can activate soil layers, increase root systems, and alleviate fertilizer effects.
(3) Combination of large water and small water flushing. Many farmers regardless of the seedling stage and the result period are fertilized with large amounts of water, making the fertilizer and water too large, causing seedling disease, rot and roots. Regardless of bio-fertilizers, organic fertilizers, and chemical fertilizers, seedling fertilizers should be seen, and the amount of fertilizers should be used rationally, and the cultivating and loosening of soils should be timely and timely.
(d) The combination of biological fertilizer and chemical fertilizer. Biofertilizer contains more than ten kinds of beneficial bacteria, which has the effect of activating soil and regulating nutrients. In combination with inorganic fertilizer (fertilizer), it can relieve fertilizer damage, increase soil organic matter and promote root development.
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