目前，旱育秧成为我省育秧的重要方式，生产上大面积采用平膜覆盖。近几年推广实践证明，平膜覆盖由于揭膜早，揭膜后冷害死苗、秧苗不长等现象突出，而采用拱膜育旱秧，由于膜内空间大，延长了覆盖时间，有利于秧苗在膜内长高，躲避３月底至４月初的低温冷害，而且能提高土温 At present, drought-raising Yang seedlings become an important way in our province, the production of large areas covered with flat film. Promote the practice in recent years proved that, as a result of flat film coverage as soon as the film uncovering, film cold shock after the death of seedlings, seedlings and other phenomena not prominent, and the use of arching membrane drought seedlings, due to space within the membrane, extending the coverage time is conducive to Seedlings grow in the membrane, to avoid low-temperature chilling injury from the end of March to early April, but also to increase soil temperature