冬季干旱时,蔬菜地适时适量浇水是很必要的,但也不能盲目浇水。一般要注意以下几点: 一、不要在蔬菜叶面有霜冻和土壤结冰时浇水,以防叶面温度骤变,造成蔬菜细胞组织破裂、脱水等。要在一天中气温较高、无霜冻情况下浇水。 二、不要在傍晚以后浇水,以防叶片上浇的水分未干,夜间寒冷结冰,使叶片冻伤。另外,也要注意收听天气预报,在寒潮到来以前,对干旱土壤及时浇水,可以减轻土壤热量散失,有利于防止冻害。如果寒潮伴随降雨,就不要浇水,以防造成土壤水分过多,土壤过于潮湿,危害蔬菜。 Winter drought, timely and appropriate watering vegetables is necessary, but not blindly watering. Generally note the following: First, do not frost in the leaves of vegetables and soil when icing watering, to prevent sudden changes in leaf surface temperature, resulting in vegetable cell tissue rupture, dehydration and so on. Water temperature should be higher in the day, no frost water. Second, do not watering in the evening, to prevent the water poured on the leaves have not dried at night, cold and frozen, frostbite leaves. In addition, we should also pay attention to listen to the weather forecast, in the cold before dawn, the timely watering of arid soils, can reduce soil heat loss, is conducive to preventing frost damage. If the cold wave is accompanied by rain, do not water it to prevent excessive soil moisture, soil is too wet, endanger vegetables.