After three to five years of continuous cropping of greenhouse peppers, due to soil nutrient imbalance, acidification and aggravation of diseases and pests, plant growth and development are often unfavorable, such as withered seedlings, rotted roots, abnormally growing growth points, and the inability of new branches and leaves to grow, and multiple diseases simultaneously. Occurrence, etc., can lead to a total loss of the entire greenhouse. In response to the above problems, the following preventive measures should be taken.
First, adjust the pH of the soil. Apply 50 kg quicklime per acre.
Second, increase organic fertilizer and fungus fertilizer. Appropriately increase the rate of organic fertilizer application in order to increase the content of organic matter in the soil and maintain a comprehensive supply of soil aggregate structure and nutrition.
Third, formula fertilization. Pay attention to the rational application of nitrogen, phosphorus and potassium, and the rational application of organic and inorganic fertilizers. The seedling stage is dominated by nitrogen fertilizers, and potassium fertilizer is the dominant species in the middle and late stages.
Fourth, timely removal of sick bodies. After the harvest is completed, the debris, etc., in the shed are thoroughly cleaned to reduce the sources of pests and diseases.
Fifth, a reasonable rotation. It can be used in rotations with legumes, onions and garlic, and grass crops.
Six, smoked shed. Before the crop is planted, 250 grams of sulfur powder and 500 grams of sawdust are mixed and fumigated for 48 hours per 100 cubic meters of greenhouse to kill pests and prevent pests. The use of high-temperature stuffy sheds after harvesting the summer crops is more effective.
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