Fertilization should not be excessive: As the greenhouse temperature is high, humidity is high, the organic fertilizer decomposes quickly, and the amount of nitrogen fertilizer is volatile. Fertilizer overage can easily cause fertilizer damage. Therefore, for greenhouses that have been continuously growing vegetables for more than three years, the amount of chicken manure and cow dung should be controlled within 2,500 kilograms per acre, and the amount of chemical fertilizer applied should be reduced by about 50%. At the same time, boron and zinc should be supplemented. , Magnesium and other fertilizers.
The temperature of the greenhouse should not be too high: Some vegetable farmers mistakenly believe that the temperature is high and the vegetables grow faster. In fact, the maximum temperature requirement for most vegetables is generally 32°C. If the temperature is too high, the growth of young fruit will be inhibited, and the vegetative growth and reproductive growth of plants will also lose their balance, and the yield will not only increase, but also decrease, and some varieties may even show only long-vine or long-growth fruits.
Keep seedlings not too dense: It was determined that 50% of photosynthetic products will be consumed by vegetative plants when 2 tomatoes are planted per square meter, and 50% of photosynthetic products are used for fruit growth. If 4 plants are planted per square meter, vegetative bodies will consume 70% to 80% of photosynthetic products. Therefore, excessive dense planting leads to reduced yield and is prone to various bacterial diseases.
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