Precautions for watering vegetables in greenhouses in winter

In the cultivation of greenhouse vegetables, winter management is very important, because the natural environmental conditions in the winter season are not so good compared to other seasons. On the one hand, it is because the temperature is lowered, the humidity is large, and there are management measures, etc., which are not very convenient. In the management of winter vegetables, watering is a relatively important position. If there is something wrong, it may cause the decay of vegetable roots. Therefore, Xiaobian here will give you a detailed explanation of some matters needing attention in watering vegetables in winter.

First, the time to water the vegetables

Watering vegetables in winter is best to water before noon, watering after noon, it is easy to affect the growth of roots due to the large temperature difference, and can not be watered in the evening. Many people often water after 10 o'clock, but when the weather is fine, the temperature in the shed is higher after 10 o'clock. At this time, watering, because the temperature difference between the water and the ground temperature is too large, it is easy to cause the roots and dead trees. Therefore, the best choice for watering is at a shelf temperature of 13-15 ° C and a ground temperature of 10-12 ° C. In addition, the interval between watering vegetables in winter is preferably about 10 days.

Second, watering on sunny days, not watering on cloudy days

Watering vegetables in winter should be watered on sunny days, not watered on cloudy days, continuous rain and snow without watering, especially in cold and snowy weather, watering should be avoided during this period. So as not to cause the ground temperature to drop, causing troubles in vegetable roots.

Third, the amount of watering vegetables

When watering vegetables in winter, the amount of watering must not be too large. It is best to use small-water irrigation under the membrane for small water irrigation. This can effectively prevent the evaporation of ground water and reduce the humidity of the air in the shed. However, for different crops, the leaf growth period is shorter, the water needs to be concentrated, the watering amount should be larger, and the watering time interval can be slightly shortened. The seedlings of greenhouse vegetables should be properly poured with some seedling water during the planting period, and watering should be controlled during the vegetable growing period.

Fourth, water temperature for watering vegetables

When the temperature of the water for watering the vegetables differs from the temperature in the shed by more than 5 °C, it is easy to cause certain damage to the roots of the vegetables. Therefore, the water temperature cannot be too different from the temperature in the shed. It is best to use deep well water and sheds. Pre-stored water is better for irrigation and watering vegetables. After the watering is completed, the vents should be closed to make the temperature in the shed reach a high level and stabilize for about 2 hours. During this period, the vegetable roots can absorb water better.

5. The location of the greenhouse where the vegetables are watered

The temperature of each location in the vegetable greenhouse is quite different, and the amount of watering should be different. The amount of watering can be more appropriate near the higher temperature. In the greenhouse, where the temperature is relatively low, when watering vegetables, the amount of water should be less.

The above is about the contents of some precautions for watering vegetables in winter. Another point to note is that after watering vegetables in winter, it is easy to cause some problems in high humidity, low temperature and disease in greenhouses. Therefore, while watering vegetables in winter, it is necessary to spray some agricultural pesticides to prevent diseases and insects. In winter, only the measures to water the vegetables are done, and the chances of safe wintering of vegetables will be greatly improved.

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