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地膜覆盖是近年来发展起来的一项重要增产措施,是协调作物生长与温湿度之间矛盾的有效途径,尤其在干旱,半干旱地区,其抗旱保墒作用对发展农业生产具有重要意义.以清水河县为例,4—6月份,平均降雨量仅80毫米左右,占全年降雨量的20%,而蒸发量高达1100—1200毫米,占全年蒸发量的46%,因此十春九旱是本地主要气候特点,抗旱保墒抓全苗是本地农
Film mulching is an important increase measure developed in recent years and is an effective way to coordinate the contradiction between crop growth and temperature and humidity, especially in the arid and semi-arid areas, and its role of drought-resistant and soil conservation is of great significance for the development of agricultural production. He County, for example, from April to June, the average rainfall is only about 80 mm, accounting for 20% of the annual rainfall, and evaporation as high as 1100-1200 mm, accounting for 46% of the annual evaporation, so ten spring nine dry Is the main climate characteristics of the local drought-resistant grasping grapes grasp of local farmers