Vegetable experts remind farmers that the following three issues should be addressed in the management of greenhouse vegetables: Do not over-fertilize due to high temperature in the greenhouse, high humidity, rapid decomposition of organic fertilizers, nitrogen evaporation, over-fertilization can easily cause fertilizer damage. Therefore, for greenhouses that have been planted continuously for more than three years, the amount of chicken manure and cow dung should be controlled within 2,500 kilograms per mu, and the amount of chemical fertilizer applied should be reduced by about 50%. At the same time, boron, zinc, magnesium, etc. must be added. Fertilizer to balance the nutrients in the soil. Do not overheat Some growers mistakenly believe that when the temperature is high, the vegetables grow faster. In fact, the upper limit of vegetable temperature is 25°C to 32°C. If the temperature is too high, the growth of young fruit will be inhibited, and the vegetative growth and reproductive development of plants will also lose their balance, and the yield will not only increase, but will also decrease, and some varieties may even show only the phenomenon of long growth and long fruit growth. Do not keep the seedlings secretly. When 2 tomatoes are planted on 1 m2, 50% of the photosynthetic products will be consumed by the vegetative body, and another 50% of the photosynthate is used for fruit growth. If 4 plants are planted per square meter, vegetative bodies will consume 70% to 80% of photosynthetic products. Therefore, dense planting results in a reduction in yield and is prone to various bacterial diseases.
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Three vegetables in the greenhouse