What are the things to be aware of when watering greenhouse vegetables in winter?
The temperature in winter is gradually decreasing. We need to pay special attention to watering vegetables in greenhouses. Today, the editors share with you some aspects that need to be paid attention to when watering:
First, pay attention to watering time: the best time for watering in winter is about 10 am, and in the afternoon (especially after 3 o'clock) must not be watered.
1. After the water is poured into the greenhouse, the humidity of the soil or the greenhouse is inevitable. In the morning, after the watering in the morning, the relatively high temperature period at noon can be used to accelerate the evaporation of soil moisture and reduce the humidity in the soil and the greenhouse.
2, the plant's strong transpiration can be used to evaporate the water in the roots, reducing the water content of the roots, thereby avoiding excessive moisture in the roots and causing disease; if watering in the afternoon or evening, the humidity in the shed will be too large, especially at night. Low temperature and high humidity make it easy to get sick. If you water the water too early in the morning, it may cause root damage due to the water temperature and soil temperature are too low.
Second, pay attention to watering weather: choose sunny watering, and try not to water the cloudy day, the specific time should be selected according to different weather conditions, less or no watering on cloudy days, rain and snow should not be watered, especially in the cold current and In the snowy weather, watering should be avoided during this period to avoid causing the ground temperature to drop, causing the vegetable roots to die, or the humidity of the air in the shed to cause the disease to occur and spread.
Third, pay attention to watering: winter crop transpiration and soil evaporation are less, so the watering amount must not be too large; then the watering interval should not be too large, according to the soil moisture situation as the standard, determine the soil moisture situation : According to the wet condition under the soil layer of 12cm, or looking at the plant, the black and green color of the plant indicates that the soil moisture is small, except for some reasons. In the winter, drip irrigation is advocated to avoid flooding, and it is best to use under-film dark irrigation.
Fourth, other matters needing attention:
1. Deep well water is better than river water and lake water. Because the temperature of well water in winter is higher, and the temperature of well water in summer is lower, we encourage everyone to use deep well water to water.
2, pay attention to the maintenance of temperature and humidity: in winter, the temperature of the watering will be significantly reduced, and can not be recovered in a short time, so pay attention to the maintenance of the shed temperature on the day of watering or a few days after watering, you can pull it a little later Windshield, increase the temperature of the shed, try to avoid the damage caused by watering and cooling, and dehumidify by increasing the temperature of the shed first and then increasing the vent.
3, pay attention to the film cover: the main role of winter mulch film is to prevent soil moisture evaporation, reduce air humidity, in order to quickly increase the ground temperature, it is recommended to cover the transparent film. There are also shacks who will lay corn stalks or peanut skins in the operation line. These can also absorb air moisture to reduce the humidity in the shed, thus reducing the occurrence of diseases.
The above is about the watering technology of greenhouse vegetables in winter. I hope to have some help for our greenhouse vegetable growers. Please pay attention to the Hui Nong School for more details.
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