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冬春,塑料大棚内密不通风,温度高、湿度大,很容易产生有害气体的危害,严重时植株枯萎死亡。大棚内有害气体主要有三种:一是肥料分解过程中产生的氨和亚硝酸气体;二是加温原料中产生的一氧化碳等;三是塑料制品中挥发出来的有害物质。产生的主要原因是施肥过量,施肥方法不妥,肥料
Winter and spring, the plastic greenhouse is not ventilated, high temperature, high humidity, it is easy to produce harmful gas hazards, severe plant wilt death. Greenhouse harmful gases are mainly three kinds: First, decomposition of fertilizers generated ammonia and nitrous acid gas; second is heated carbon monoxide generated in the raw materials; Third, the volatile plastic products out of harmful substances. The main reason is the excessive fertilizer, fertilization method is not proper, fertilizer