During the nursery period of rapery, it is during the cold season in winter and spring. It often encounters bad weather such as yin, cold, wind, snow, and rain. Poor management often leads to failure of nursery. 1. Cold weather. In winter or early spring, when it encounters persistently low temperature and cold weather, cover of mane grasshoppers and grasshoppers should be exposed properly. After the exposing ceremony, it is necessary to observe the changes in the temperature. If the temperature is slightly reduced, it should follow the cover. The temperature will rise slightly. The cover can be re-covered before 2 pm. In order to strengthen the heat preservation at night, the number of bristles can be appropriately increased to thicken the cover. When the bristles are insufficient, cover the grasshopper. There are many vegetable farmers who often do not open the cover on the day or even several consecutive days in cold and cold weather. As a result, the seedlings will grow weak. When the weather warms up, it will easily cause wilting death (commonly known as “flashing seedlingsâ€). ). 2. Night cool weather. In early spring, a cold stream often occurs for several consecutive days. When the cold weather arrives, there is often a sudden drop in temperature at night, and there is a slight oversight in management, which can cause great losses. To this end, we must pay attention to listening to and watching the weather forecast of local meteorological stations frequently. In the event of night-falling weather, we must cover and tighten the coverings of mane grasshoppers, grasshoppers, and so on. If the cooling rate is excessive, we must increase the coverage appropriately. . 3. Windy weather. During the day, the transparent cover shall be fixed so as not to be blown by the wind. The cover shall be tight and covered at night. If necessary, the beak, grasshopper, etc. shall be pressed well. Otherwise, once the wind is blown off, the seedling will be easily frozen. In the mid- and late-stage encounters with southerly weather, although the temperature is relatively high, cold air should be prevented from blowing directly from the vents into the raft to avoid damaging the seedlings; if necessary, it can be ventilated in the mouth of the raft. 4. Cloudy weather around noon. Before and after noon, the sun shines brightly, and the temperature changes rapidly. If clouds appear in the sky, you must observe the changes of the temperature at any time. Clouds cover the sun, the temperature of the earth will decrease, and the ventilation holes must be closed. When the clouds pass the sunrise, the temperature will be very high. When it rises quickly, vents should be opened in time to prevent roasting and seedlings, especially when the top of the seedlings touches the plastic film. 5. Snowfall weather. During the daytime snowfall, it is necessary to cover the mane grasshoppers, cover the grasshoppers again, remove the snow immediately after the snow stops, take snowfalls at night, and sweep the snow after the snow stops in the morning to keep the cover dry, and timely remove the cover. See seedlings see light. The continuous cloudy snow weather suddenly turns fine. After removing the cover, pay attention to observe the change of the seedlings and find the wilt. Immediately cover it with a bristle, recover it and then uncover it. Wilt and then cover it. Such repeated, after 2 to 3 days Can be transferred to normal management; 6. Rainfall weather. Rainfall during the day, promptly peeled off the cover to prevent the beddings of grasshoppers and grasshoppers from being affected by the rain. However, care must be taken not to allow the rain to splash into the cocoon. During the night, after the rain, the cover should be dried.
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