贵州烟区残膜污染状况与治理技术分析

Pollution condition and treatment technical analysis of residue film in Guizhou tobacco-growing areas

通过对以毕节烟区为代表的贵州烟区残膜状况调查,对所采集的3 120个数据进行重点分析。结果显示：每公顷烟地0-25cm土层深度内残膜平均总重量194.3kg,总张数490 600张;残膜主要集中于表面层及0-10cm土层内,平均重量占比92.2%,张数占比75.6%,残膜破损程度随土层深入而加重,不同地区残膜重量和数量差异最大分别为1.73倍和2.09倍,5年以上覆膜历史相较3年以下覆膜历史残膜重量和数量分别增加63%和230%,差异显著。最后根据残膜分布情况提出了残膜污染治理建议。

According to an investigation of residue film condition in Bijie,3120 data were collected.The result shows that：the average total weight of residue film in per hectare of tobacco-planting land that depth of 0-25cm soil layer is 194.3kg,the total number of sheet is490 600;the residue film is concentrated in the surface and 0-10cm soil layer,the average ratio of weight is 92.2%,the ratio of number is75.6%,the damage degree of the residual film was increased with the depth of the soil layer,the maximum variance of weight and number in different regions was as large as 1.73 and 2.09 times,the weight and number that of 5years or more were increased by 63%and 230%than that of 3years or less.According to the distribution situation of residue film,some treatment suggestions were put forward.