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我省去年引进厚度为0.015毫米的日本塑料薄膜,在全省19个单位60多个实验点试用,覆盖面积70多亩.塑料薄膜覆盖地有如下优点:1.提高前期地温蔬菜作物未封垄前,覆盖比对照日平均土温(0～10厘求)高3～5℃;封垄后增温0.5～1℃.夏季高温时期不会发生高温障碍.大棚内地面覆盖增温效果和露地地面覆盖增温效果相似.南塔大队黄瓜大棚4月7～30日覆盖比不覆盖地温高3.5～2.2℃;5月1～15日覆盖的高2～1℃.覆盖后4月10日地温高10℃以上,未覆盖的4月20日方能达到10℃.
Last year, the province introduced a thickness of 0.015 mm Japanese plastic film, 19 units in the province more than 60 experimental point trial, covering an area of 70 mu. Plastic film coverage has the following advantages: 1. To improve the pre-geothermal vegetable crops without ridge Before and after the cover, the temperature was 3-5 ℃ higher than the control daily average soil temperature (0-10%), and the temperature was increased by 0.5-1 ℃ after the closure of the ridge.High temperature disturbance did not occur in the summer high temperature period.Heat warming effect and open ground Ground warming effect is similar to cover the South Tower brigade cucumber shed April 7 to 30 than the uncovered ground temperature high 3.5 ~ 2 2 ℃; May 1 to 15 high cover 2 ~ 1 ℃. After covering the April 10 ground temperature High 10 ℃ above, not covered April 20 can reach 10 ℃.