蔬菜地冬灌有好处菜地冬灌能满足越冬蔬菜生长发育需水，可增加土壤水分含量，增大土壤热容量和导热率，使外界冷流不易直接侵入土壤，阻止近地表和土壤温度的过快下降，从而可使蔬菜免遭冷害和冻害。菜地冬灌的时间应掌握在白天土壤全部化冻、夜晚结冻这一时期为适宜，这... Vegetable winter irrigation has advantages Vegetable winter irrigation can meet the growth and development of winter vegetables, water can increase the soil moisture content, increase the soil heat capacity and thermal conductivity, so that external cold flow is not easy to directly invade the soil, to prevent the near surface and soil temperature drop too fast , So that vegetables can be free from chilling and frost damage. Vegetable irrigation time should be controlled during the day all the soil thawing, freezing at this time is suitable for this period, this ...