Reasonable watering is an important measure to ensure the robust growth of greenhouse vegetables and increase yield. Aiming at the problems of low winter temperature and high humidity in the shed, the following matters should be noticed when watering vegetables in the greenhouse: 1. Pay attention to growth. Look at the growth of the plant. Usually, when the plant is deficient in water, the leaves will wither, the growth will weaken, and the umbilical rot of the fruit will occur more often. At this time, water should be added in time. 2. Pay attention to love. It depends on the soil moisture. If watering in the greenhouse when the soil is not dry, not only is it not conducive to raising the ground temperature, but also easily leads to poor soil air permeability, resulting in hypoxia of the root system, resulting in yellow roots and yellow leaves. 3. Pay attention to the weather. Before watering, you must watch the weather forecast. Not only should you choose sunny watering, but also ensure that there are 2-3 days of sunny watering after watering to avoid rainy weather after watering, which will increase the humidity in the shed and reduce the ground temperature. , Disease-prone. In the deep winter season, more attention should be paid. In the first two days after a cloudy day, it is not suitable for watering. The shed temperature and ground temperature should be raised to make the plants return to normal before watering. 4. Pay attention to ground temperature. The suitable daily average ground temperature for vegetable growth is around 22 ° C, and in the deep winter season, the ground temperature in the shed is mostly 15 ° C to 20 ° C. If excessive watering or the timing of watering is not correct, the ground temperature will drop rapidly, causing root injury, Endangering the growth of the plants above ground, therefore, watering at low temperatures is best performed after the grasshopper is opened in the morning. 5. Pay attention to covering the mulch. The mulching film can not only reduce ground water evaporation, maintain soil moisture, reduce watering times, reduce air humidity, reduce disease occurrence, but also increase ground temperature and accelerate vegetable growth. 6. Pay attention to moderate watering. Watering vegetables in winter and spring greenhouses generally follows the principle of no shortage, no watering, and dry and not wet, keeping the water content of vegetable rhizosphere soil at about 60%, preventing excessive watering and frequent flooding. Excessive watering can easily reduce the air temperature and soil temperature in the shed, which is not good for vegetable growth. Use small water to water, or use a kettle to water the plants. 7. Pay attention to regulating water temperature. When the water temperature is more than 5 ° C from the temperature in the shed, it is easy to cause root injury. Deep well water with higher water temperature or pre-storage irrigation in the shed is better. 8. Pay attention to the management after watering. In the first two days after winter watering, the temperature should be raised to about 40 ° C at noon, and the shed should be kept for 1 hour to increase the ground temperature in the shed. Then increase the ventilation and reduce the humidity in the shed. In view of the susceptibility of the vegetables to plant diseases, spraying is used to prevent the occurrence of diseases and insect pests. Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone disposable trocar, spc trocar, laparoscopic trocar, thoracic trocar Ningbo Yaoming Medical Technology Co., Ltd. , https://www.yaominmed.com