Winter vegetable shed uncover
Correctly exposing the grasshoppers is extremely important for the production of vegetables in winter greenhouses. Here, farmers are reminded that they should pay attention to science. In the morning, I have asked many vegetable farmers in the past: what is the basis for exposing the grass in the morning? The answer is very consistent: When the sun shines on the shed, it is revealed. To what extent did you expose it? Most vegetable farmers cannot answer it. In fact, the temperature in the shed should be used to determine if the time is right. Specifically, the temperature in the shed will be reduced, but the temperature must not exceed 1°C. More than 1°C means that the grasshopper has been exposed early. The temperature in the shed did not decrease, indicating that the grasshopper was late. In the afternoon, the time for the farmers to cover the grass in the afternoon is even more varied. Some are covered by the sun, others cover the afternoon from half past three to four in the afternoon. In fact, this is not scientific, and it should be determined based on the temperature in the shed. Awkward time. The method is: When the temperature in the shed drops to 17°C-18°C, the grass cover will start to cover. After covering the larvae, the temperature in the shed may increase, and the temperature rise cannot exceed 1°C. Emphasizes that the air temperature is between 17°C and 18°C. The cover grass is related to the transport of organic matter. Crops produce organic matter through photosynthesis and are manufactured during the day and transported at night to various organs of the crop (roots, stems, leaves, fruits). When the greenhouse is covered with haystacks, the stomata of the crop are closed and transport begins. The transport speed is directly related to the greenhouse temperature. In the case of 15°C-17°C, transport is completed in 7-8 hours, and if the temperature is lower than 15 °C, it will take 15-16 hours to complete the shipment. The organics that haven't been shipped to the uncovered grasshopper can only be transported at the next night. If the “warehouse†is not released, it will directly affect the production of photosynthetic products on the next day. The yield of vegetables has a great influence. After a long period of cold rain, snow and snow suddenly cloudy even after a cloudy day, do not open all the grasshoppers to prevent "flashing seedlings" (a few days of rain and snow did not reveal grasshoppers, crops within the shed did not see light, leaves Thin and tender, sunny daylight, strong evapotranspiration, dehydration and wilting of leaves. In the first three days, it is necessary to expose the flowers. After one or two openings or two openings, the area opened will gradually increase. After two days, the sheds that use the roller blind machine will be opened first, and then gradually increased. A seedbed or seedling bed is the local soil environment in which seeds are planted. Often it comprises not only the soil but also a specially prepared cold frame, hotbed or raised bed used to grow the seedlings in a controlled environment into larger young plants before transplanting them into a garden or field. A seedling bed is used to increase the number of seeds that germinate. Greenhouse Seedling Bed,Stainless Greenhouse Seedling Bed,Greenhouse Seedling Nursery Bed JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com