一、塑料大棚内地膜覆盖 地膜覆盖同塑料大棚结合这种形式,缓苗快,促进植株生长发育,利于雌花成熟,产品可提早7～15天上市;因棚内空气湿度比单纯大棚低7～10％,可使霜霉病推迟5～15天发生,发病率降低5～21％,病情指数低7～28.4％。亩增产20～35％,亩增值30～50％,前期(5月下旬至6月上旬)增产幅度可达50～90％。 First, the plastic greenhouse covered with plastic film covered with plastic greenhouse with this form, Huanmiao fast, to promote plant growth and development, which will benefit the female flowers mature, the product can be listed 7 to 15 days earlier; because the shed air humidity is lower than the simple greenhouse 7 ~ 10%, downy mildew can be delayed 5 to 15 days, the incidence decreased by 5 to 21%, the disease index low 7 to 28.4%. Mu yield 20 to 35%, 30-50% increase in value of acres, early (late May to early June) yield increase of 50 to 90%.