大棚花卉冻害预防
China Flowers & Horticulture（2017）
Abstract
严冬季节,气温较低,大棚花卉受冻害的情况时有发生.现介绍几个预防冻害的方法:
增加覆盖物 夜间在大棚四周加围草苫或玉米秸,可增温1℃～2℃.在原来的草苫上再加1层薄苫子,可使棚温提高2℃～3℃.在原来的草苫上覆盖1层薄膜,不仅可以挡风,还能防止雨雪打湿草苫,从而减少因水分蒸发引起的热量散失.
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