三保墒三措施保墒的中心任务是使表土细软、紧密,以防止汽态水的蒸发。以下三个措施是完成达一任务的重要手段。冬春镇压“夏不走捷路,冬不走弯路”的农谚蕴藏着一个十分重要的科学规律。原来,土壤水分并非在任何情况下,都以毛管水的方式运动。在土壤干旱情况下(土壤湿度小于11～12%、地表出现3～5厘米干土层时), Three Paul three measures Soil moisture conservation center mission is to make the topsoil thin, close to prevent the evaporation of vapor water. The following three measures are an important means of accomplishing a task. Winter and spring repression “Summer does not take the shortcut, winter does not detours ” is a farming proverb holds a very important scientific law. It turned out that soil moisture is not in any case, are to capillary water movement. In the case of soil drought (soil moisture is less than 11 ~ 12%, the surface appears 3 to 5 cm dry soil layer)