冬灌的作用冬小麦的初冬灌水是华北农民多年行之有效的、保苗和增产的措施。我们国营农场几年来进行冬灌也得到了同样的效果。冬灌对小麦的主要作用是:1.防止土壤温度的剧烈变化,保护幼苗安全越冬;2.促进土壤的保墒作用,避免过早春灌。因此,在冬季寒冷少雪,春季干旱多风的地区(如华北),初冬灌水是保证小麦丰产的重要措施之一。但是在低湿或地下水位较高的地区,则不一定需要冬灌,因为这些地区的土壤含水量一般是很高的。冬小麦的冻害和霜害主要是由于冬季或早春温度的剧烈变化所造成。但是水的特性却能防止温度 The role of winter irrigation Early winter irrigation of winter wheat in North China is effective for many years, seedlings and increase production measures. Our State-owned farms have also had the same effect of winter irrigation for several years. Winter irrigation on the main role of wheat are: 1. To prevent the dramatic changes in soil temperature, seedlings protect the safe winter; 2. To promote the role of soil moisture Preservation, to avoid premature spring irrigation. Therefore, irrigation in early winter is one of the important measures to ensure high yield of wheat in the areas of cold and snow-less winters and spring arid and windy areas (such as North China). However, areas with low humidity or high groundwater levels do not necessarily require winter irrigation, as soil moisture in these areas is generally high. Frost damage and frost damage in winter wheat are mainly caused by the dramatic temperature changes in winter or early spring. But the water’s properties prevent the temperature