First, the vegetables on the front face need to keep warm and wet in early winter. The outside temperature drops below 5°C, and the night temperature inside the shed is also reduced. Vegetables such as tomatoes and cucumbers have begun to be insulated through decentralized insulation, and some vegetable farmers worry about it. After the insulation is fully put on, the temperature inside the greenhouse is too high, and the vegetables will appear to be prolonged, so the insulation will be decentralized by two thirds. However, at this time, if the temperature of the vegetables on the front face is low, there will be a weak overall situation. Especially after entering the winter, the vegetables on the front face of the greenhouse will be in a low-temperature and high-humidity environment for a long time. Therefore, the farmers should take measures to improve in time. . Such as deep excavation of greenhouses, covering the front of the membrane, set up drainage tubes to reduce humidity. At the same time, increase the temperature by adding a thin film, or covering the straw or insulation outside the greenhouse, and maintain a relatively suitable growth environment for the vegetables on the front face.
The second is to adjust the height of the plants to take cucumbers as an example. Crops that grow on one side and produce melons have a longer growth period and require repeated operations. After the greenhouse has been insulated, the temperature in the greenhouse has increased. If the water is added to the greenhouse, the humidity in the greenhouse will increase, and the cucumber will grow faster. The next day it will show a significant difference. Then, the vegetable cultivators should decentralize the height of the vines and maintain the overall height in a consistent manner, so that they can be managed later.
The third is to look at the direction of wind direction adjustment. The change of wind direction during the closing time also indicates the change of the weather. If the south wind comes, the weather will warm up. Therefore, it is necessary to close the tuyere at night to avoid excessive nighttime temperatures in the shed. On the contrary, when the north wind is used, the air inlet insulation must be closed in advance to prevent the nighttime temperature from being too low and affect the normal growth of greenhouse vegetables.
Fourth, weaker plants and less spray control Wang medicine currently, the night temperature decreased, but the early decentralization of insulation, will lead to the shed night temperature is too high, especially the temperature of the last night, vegetables prone to leggy situation. In order to quickly adjust the growth of plants, many growers choose to use spray control. Here, the authors remind farmers that when spraying pesticides, they can adjust the dose of different plants by walking speed. If the growth of the plants is weak, they should speed up their walking and reduce their doses. Otherwise, they can maintain normal speed. Make sure that the leggy plants receive the medicine evenly; for the plants at the turning point, avoid repeated use of the medicine and control the situation of excessive hyperactivity. Http://Content/aa9d2266-d9dc-4da0-b165-b79abbc3ccb5?cType=2
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