Whether the number of times of watering and the amount of watering in greenhouse vegetable is appropriate has a great influence on the growth rate, yield and benefit of vegetables. In winter, the temperature is low and the water temperature is low. Even if the water temperature of the newly extracted well is only about 10°C. After each watering, the ground temperature will be greatly reduced, which will not only lead to the normal growth of the sheds for several days, but will also induce gray mold, downy mildew, leaf mold, etc. due to increased humidity in the shed after watering. The occurrence of a variety of hi wet diseases, thereby increasing the cost of prevention and labor, directly affect the yield, quality and efficiency of vegetables. So, how can watering achieve the best results? In the winter, the number of watering should be minimized, that is, reasonable water control. First cover the film. Covering the mulching film can not only reduce the evaporation of ground water, maintain soil moisture, reduce air humidity, reduce the occurrence of diseases, but also increase the temperature of the ground and speed up the growth of vegetables. Followed by water warming. The so-called water storage and warming is to build a reservoir in the greenhouse, first raise the temperature of the water through the reservoir and then water the vegetables. This method is simple, practical and effective. The disadvantage is that it takes up some space in the shed. Finally, the watering method should be appropriate. Reasonable watering methods can not only reduce the number of watering, save water, but also reduce the side effects caused by watering. Specific should master the following skills: 1. Change the ordinary furrow watering to drip irrigation under the membrane. This can increase the ground temperature around 5 °C, reduce air humidity by about 10%, thereby reducing the disease more than 30%. 2, a reasonable arrangement of watering time. Greenhouse vegetables should be watered before and after noon, and it is best to use 10:00 am and before 3 pm. 3. Reasonably water according to the growing period and type of vegetables. Due to the different types of vegetables and different water requirements during the growing season, different watering methods should be adopted. General vegetable seedlings planting period should be suitable for watering seedlings, hair control watering. When the first fruits of fruit vegetables begin to expand, the amount of watering should be gradually increased. The result is the peak period of water demand, and it is necessary to maintain adequate moisture. 4, see the sky watering. In sunny days, the temperature in the shed is high, and the amount of water in the shed must be increased. If not, it should be less. In particular, rain, snow, and weather should not be watered. The amount of water to dry over the ground is appropriate, must not flood irrigation. 5. Reasonably water according to different parts of the greenhouse. Because the temperature in each part of the greenhouse varies greatly, the number of waterings and the amount of watering should also be different for different parts. Generally, at the southern end of the greenhouse and near heat sources such as a warming stove and a flue, due to the large amount of evaporation of soil moisture, the amount of watering should be appropriately large, and other places should be poured as little as possible. In short, as long as a reasonable watering is achieved, not only can the greenhouse vegetables grow well, but also the cost can be reduced, so as to achieve the purpose of increasing the benefits. Sports and Outdoors:
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