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在早春小拱棚蔬菜栽培中,聚乙烯有滴膜已被广泛采用。但这种膜韧性差,拉力弱,易老化,保温性欠佳。1992年春,我们进行了聚氯乙烯无滴膜覆盖小拱棚甘蓝试验。试验在平原县寇坊乡张塘村进行。供试品种为中甘11。1991年12月4日播种,1992年2月20日定植,4月8日采收上市。分别于2月25日、3月10日、4月2日测棚内生态因子,结果表明:聚氯乙烯膜与聚乙烯膜相
In early spring small shed vegetable cultivation, polyethylene has a drop film has been widely used. However, this film is poor toughness, pull weak, easy to aging, poor insulation. In the spring of 1992, we carried out a PVC small drip film covered small cabbage test. The experiment was conducted in Zhangtang Village, Koufang Township, Pingyuan County. Test varieties for the Gan 11. 11 December 1991 sowing, February 20, 1992 colonization, April 8 mining market. Respectively on February 25, March 10, April 2 ecological factors in the test shed, the results show that: polyvinyl chloride film and polyethylene film phase