Watering vegetables in greenhouses should be arranged on sunny days. It is best to have several consecutive sunny days after watering. In the morning, you should choose not only the difference between water temperature and ground temperature, the temperature is easy to recover, but also sufficient time to eliminate the increased air humidity due to watering. 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 water the water in the evening and in the wind and snow, to avoid the difficulty in recovering the temperature inside the shed, and the humidity is too large, causing vegetable diseases to occur. When the greenhouse vegetables are seriously deficient in water, the plants are wilting and the leaves are scorched; when the water is too much, the soil is dehydrated, causing the roots to rot, and the above-ground parts of the stems and leaves are yellow or even dead. In winter, the temperature of greenhouse watering is low, the amount of air released is small, and the water consumption is small. At this time, the humidity changes greatly after watering, and the duration is long, so it needs to be poured in small water. When the temperature in the shed is relatively low, the number of watering should be reduced as much as possible, and the amount should be small. Avoid flooding with large water to prevent the roots of vegetables from being caused by low temperature and high humidity. Watering in greenhouses in winter should be directly irrigated with underground well water. If cold ground water is used for irrigation, the roots of the plants will be stimulated, which will affect plant growth. When watering, water temperature is required to be as close as possible to the ground temperature. On the day of watering, in order to restore the ground temperature as soon as possible, the greenhouse should be closed, so that the temperature in the shed can be rapidly increased, and the temperature will be raised by the temperature. After the ground temperature rises, the air is released for dehumidification to lower the temperature to a suitable range. Other Specific Function Centrifuge Other Specific Function Centrifuge,Pcr Plate Centrifuge,Specific Function Centrifuge,Medical Refrigerated Centrifuge Guangdong Widinlsa International Co.Ltd , https://www.guangdongwidinlsa.com
Tips for watering vegetables in greenhouses in winter