青海省农田地膜残留状况调查与分析

Analysis on the Current Situation of Mulching Film Residue in Qinghai Province

在青海省主要农业区选取具有较强代表性的12个地膜残留监测点，对全省地膜残留的情况开展调查分析。结果表明，青海省地膜残留量变化在0．90～7．05 kg·hm‐2，地膜当年残留率平均为3．25％。种植方式、覆膜年限和种植作物类型均是影响地膜残留量的主要因素，其中露地蔬菜的种植方式残留量最高，达到了3．73 kg·hm‐2；地膜覆膜年限越长，残留率越大；不同作物类型中循化线椒的地膜残留率最高。说明目前青海省地膜残留较全国其它省份轻，危害程度相对较小。

Twelve monitoring sites with strong regional representation were selected as the monitoring object . The investigation was carried out to know the current situation of mulching film residue in most agricultural ar‐eas of Qinghai province .The results showed that the amounts of mulching film residue were varied from 0 .90 to 7 .05 kg-hm‐2 ,and the rate of mulching film residue was 3 .25% averagely .The planting pattern ,the time with mulching film and the crops were major impact factors .The highest mulching film residue obtained by open‐field vegetables planting pattern ,reached up to 3 .73 kg-hm‐2 .The more longer the years of the film coa‐ted ,the more greater the residual rate .Xunhua line pepper got the highest rate of the film residue among the rest of different types of crops .The conclusion could be reached that the harmful of mulching film residue in Qinghai province was less serious obviously in comparison with other regions .