吉林省主要覆膜作物地膜残留情况调查

通过文献调研、问卷调查和典型样点采集的方法对吉林省3种主要覆膜作物的地膜残留情况进行调查分析,结果表明：地膜残留量与覆膜年限、地膜回收方式以及种植作物种类密切相关。随覆膜时间的延长地膜残留量有增加的趋势。3种模式地膜残留量由高到低为：瓜菜模式〉玉米连作模式〉花生连作模式,连续覆膜10年,3种模式的地膜残留量分别为30、28.35 kg·hm^-2和15.9kg·hm^-2。以一级污染水平作为标准（75 kg·hm^-2）,覆膜量每年按75～150 kg·hm^-2、年残留率按1.2%～4.02%计,估算吉林省安全使用地膜的年限约为12～83年。

Mulch Plastic Film Residue Investigation of the Main Crops in Jilin Province,China

Investigations were conducted about the mulch residue circumstances of three main crops in Jilin Province. The investigation results showed that the amount of mulch film residue was closely related to mulched years,film recovery modes and the type of growing plants. Amount of mulch fillm residue increased with the increasing of mulched years. Amount of mulch fillm residue in the three planting modes was that melons vegetables modecorn succession cropping modepeanut succession cropping mode. The total amount of residual plastic film in the three planting modes was 30、28.35 kg·hm^-2 and 15.9 kg·hm^-2 for 10 years respectively. If we took the first pollution level as standard（75 kg·hm^-2）,took the total application amount as 75～150 kg·hm^-2 per year,took residual ratio as 1.2 % to 4.02 % per year,we estimated that the safe years of plastic film application was 12～83 years.