Winter greenhouse vegetable irrigation should be arranged on sunny days, and it is best to have several consecutive sunny days after irrigation. In the morning, you should choose not only the difference between water temperature and ground temperature, the temperature is easy to recover, and there is sufficient drainage time. Generally, it is not suitable to choose at noon to avoid watering at high temperature affecting the physiological functions of the root system. It is also not advisable to irrigate in the evening and windy days to avoid causing excessive humidity in the shed, causing vegetable diseases to occur.
When the greenhouse vegetables are seriously deficient, the plants are wilting and the leaves are scorched; when the water is too much, the soil is deprived of oxygen and causes the roots to suffocate and rot, and the above-ground parts of the stems and leaves are yellow or even die. In winter, the greenhouse watering temperature is low, the air volume is small, and the water consumption is small. At this time, the humidity changes greatly after watering, and the duration is long, so it is necessary to dip the water. When the temperature in the shed is relatively low, the watering amount should be small, and the interval time should be long. Avoid flooding with large water to prevent the vegetable roots from being caused by low temperature and high humidity.
Winter greenhouse irrigation should be directly irrigated with underground well water. If irrigated surface water is used for irrigation, the water temperature should not be lower than 2 °C -3 °C. Usually, the water temperature is required to be as close as possible to the ground temperature at that time.
Greenhouse vegetable irrigation should be controlled by micro-water irrigation, especially in winter, because the use of micro-irrigation in greenhouses has a significant effect on the improvement of crop growth environment, and has a positive effect on the balance and coordination of water, fertilizer, gas and heat required for crop growth, especially It is the use of micro-irrigation in the first half of the period, which is conducive to promoting root control, controlling air humidity in the shed and reducing the occurrence of pests and diseases. Micro-irrigation can also effectively control the amount of water, reduce the amount of water leaking from deep leaks and fertilizer loss, improve soil structural properties, promote crop growth and improve vegetable quality.
On the day of irrigation, in order to restore the ground temperature as soon as possible, it is generally necessary to close the greenhouse so that it can rapidly raise the temperature and promote the temperature with the temperature. After the ground temperature is raised, the plants that prefer air drying are dehumidified in time to reduce the temperature to a suitable range. Watering in the seedling stage is to increase the temperature and protect the sputum, and more emphasis on cultivating. When the seedlings grow up, they are generally not cultivated to prevent injury.
When the greenhouse vegetables are seriously deficient, the plants are wilting and the leaves are scorched; when the water is too much, the soil is deprived of oxygen and causes the roots to suffocate and rot, and the above-ground parts of the stems and leaves are yellow or even die. In winter, the greenhouse watering temperature is low, the air volume is small, and the water consumption is small. At this time, the humidity changes greatly after watering, and the duration is long, so it is necessary to dip the water. When the temperature in the shed is relatively low, the watering amount should be small, and the interval time should be long. Avoid flooding with large water to prevent the vegetable roots from being caused by low temperature and high humidity.
Winter greenhouse irrigation should be directly irrigated with underground well water. If irrigated surface water is used for irrigation, the water temperature should not be lower than 2 °C -3 °C. Usually, the water temperature is required to be as close as possible to the ground temperature at that time.
Greenhouse vegetable irrigation should be controlled by micro-water irrigation, especially in winter, because the use of micro-irrigation in greenhouses has a significant effect on the improvement of crop growth environment, and has a positive effect on the balance and coordination of water, fertilizer, gas and heat required for crop growth, especially It is the use of micro-irrigation in the first half of the period, which is conducive to promoting root control, controlling air humidity in the shed and reducing the occurrence of pests and diseases. Micro-irrigation can also effectively control the amount of water, reduce the amount of water leaking from deep leaks and fertilizer loss, improve soil structural properties, promote crop growth and improve vegetable quality.
On the day of irrigation, in order to restore the ground temperature as soon as possible, it is generally necessary to close the greenhouse so that it can rapidly raise the temperature and promote the temperature with the temperature. After the ground temperature is raised, the plants that prefer air drying are dehumidified in time to reduce the temperature to a suitable range. Watering in the seedling stage is to increase the temperature and protect the sputum, and more emphasis on cultivating. When the seedlings grow up, they are generally not cultivated to prevent injury.
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