In some parts of China, the soil will freeze before and after the winter solstice. At this time, the anti-freezing effect after winter irrigation will make the topsoil form false crumbs of 1 to 2 cm, which can reduce surface evaporation, facilitate the safe wintering of roots and trees and the second year of vines. The body grows robustly. In addition, the winter irrigation can reduce grape pests and diseases in the following year. After winter irrigation, the surface eggs and pathogens can be frozen in ice water. In addition, the winter irrigation can speed up the organic fertilizer maturity, most farmers in the application of basal fertilizer after irrigation or irrigation of small water, winter water irrigation is conducive to the absorption of minerals in the root system, improve the accumulation of nutrients in the tree, increase soil moisture content , Prevent spring drought, increase the yield and quality of fruit trees. It should be noted that the winter irrigation time is just before the soil is frozen or frozen. The amount of irrigation varies according to the soil quality. The sandy land is about 70 square meters per mu, and the other soil is about 50 square meters.
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