Continued haze, rainy weather, and weather have adversely affected the production of vegetables in the facility. In order to reduce the impact of severe weather on the production of vegetable facilities and reduce the loss of vegetable farmers, the vegetable experts of the Ministry of Agriculture put forward technical guidance on the production and management of facilities for vegetable production. The specific measures are as follows:
Increase plant resistance to stress
Increase organic fertilizers and properly supplement organic materials and foliar fertilizers. Fertilizer amount should be determined based on the soil fertility and the target fertilizer yield. Usually, when the soil fertility is low, the fertilization amount can be determined according to 1.5 times the target yield and fertility, and when the soil fertigation capacity is high, The fertilization amount was determined according to 0.8 times the target amount of fertilizer. The actual production of organic fertilizer per acre is generally 7 to 10 tons, plus 1,000 kilograms of crushed straw, plus 20 to 30 kilograms of compound fertilizer, plus 10 to 15 kilograms of slaked lime. At the time of haze, it is possible to spray 0.3% potassium dihydrogen phosphate plus 0.3% calcium nitrate plus 1% glucose solution.
Adjust the amount of plant results. When the plant growth is weak, appropriate thinning and fruit thinning should be carried out, and timely harvesting should be carried out in a timely manner to reduce the burden on the plant. When the plant grows vigorously, more fruits should be kept and harvested appropriately to prevent overgrowth of nutrients.
Strengthen environmental regulation
Regulate the light environment to prevent photosynthesis disorders in vegetables. 1. Increase the illuminance. The contamination on the film is cleared in time to ensure high transmittance of the plastic film. 2. Increase lighting time. Within the allowable range of temperature, try to cover the insulation of the cover as early as possible (grass weeds). On sunny days, weeds should be covered as early as possible, so as to extend the time for vegetables to see light; according to the outside temperature conditions, we can uncover the grasshoppers at noon so that the vegetables can receive more scattered light, which cannot be uncovered for several days in a row. . 3. Artificial light. When the haze weather exceeds 2 days, the plant grow light can be properly used to supplement the light. Generally, each lamp is 40W, and 25 ç› per acre is appropriate. When the light is weak, the light is filled every day for 3 to 4 hours, which can significantly increase the yield and quality.
Avoid weather hazards
After a few days of continuous rain and fog, the weather suddenly turns cloudy, and the light suddenly becomes strong. This can lead to a sudden increase in the temperature in the greenhouse and a lag in the temperature of the soil. The weak absorption capacity of the roots of the crop and the sudden increase in transpiration of stems and leaves lead to dehydration and wilting. Therefore, we must pay attention to the interval and alternately exposing, and we must not immediately uncover all grasshoppers and avoid the loss of water and wilting of crop leaves under strong light. If you find that the leaves are wilting, cover the grass cover and wait until the plants recover.
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