How to water the vegetables in the greenhouse in winter? What should I pay attention to?

In the cold winter can eat fresh vegetables, mainly because the greenhouse planting, you can eat vegetables of the four seasons. The watering management of greenhouse vegetables is very important, so how to water greenhouse vegetables in winter? What should I pay attention to?

1. Water quantity

When the temperature is lower in winter, the rate of water evaporation of vegetables decreases and the demand for water decreases. Therefore, we can appropriately reduce the amount of water in winter, and its watering frequency should be slightly increased. Small water drip irrigation should be used when watering to prevent excessive moisture, high humidity and low temperature leading to retting root rot of vegetables. In winter, as long as you meet the water demand of vegetables, try to combine water and fertilizer.

Second, watering time

The watering time of vegetables in winter greenhouse also has certain requirements, generally we should water at noon, the best watering time is 10:00-15:00 every day. Because the temperature of the greenhouse during this period is relatively high, freezing damage can be avoided. When watering, try to use well water, because the temperature of well water is relatively high, you can also heat the water temperature to about 10 degrees. To prevent too low water temperature resulting in vegetables can not adapt, resulting in frost damage.

Third, watering according to the weather

Observe the weather when watering, increase the amount of water on sunny days, reduce the watering frequency, not only do not water on cloudy and rainy days, but also do a good job of rain prevention and drainage. And when the weather temperature gradually decreases from high to high, the amount of water should be reduced in time to prevent excessive water from waterlogging and freezing damage. On the contrary, it is necessary to appropriately increase the amount of water to ensure sufficient water, but also to prevent vegetables from frost injury, waterlogging and so on.

Fourth, watering according to the growth

Most vegetables have different requirements for water at different growth stages, so we have to control the amount of water and adjust the watering method according to the growth of vegetables. Generally speaking, the growth cycle of leafy vegetables is not long, so the period of water demand is relatively concentrated, with a large amount of water and a short watering interval. In the seedling stage, the soil should be moist, the seedlings should be slowed down, the watering amount should be controlled during the budding stage, and then the watering amount should be increased during the fruit expansion period to ensure sufficient and suitable water for vegetable growth.

Fifth, watering position

The temperature difference between different locations in the greenhouse is relatively large, so when we water in different locations, there is also a difference in the amount of water and the interval between watering. In the parts where the sunshine time is longer, the rate of water evaporation is faster, and the demand for water is greater, so it is necessary to increase the amount of water. However, the position on the back of the sun needs to control watering, reduce the amount of water, and prevent too much water from affecting the growth of vegetables.