重庆茶叶污染途径研究

调查区域土壤环境质量符合NY/T 391-2000《绿色食品产地环境技术条件》标准，75%的土壤样本符合NY 5199-2002《有机茶产地环境条件》标准，土样中六六六和滴滴滴均未检出，研究区域茶叶产地环境质量优良。对茶叶所检指标六六六、滴滴涕、铜、铅，按NY 5017―2001《无公害食品——茶叶》进行评价，鲜茶叶样本超标率为0，成品茶叶样本超标率为11%，污染物为铜。按NY 5196―2002《有机茶》标准进行评价，鲜茶叶样本超标率为95.2%，超标污染物为六六六和铅，六六六检出率为95.2%，铅超标率为9.5%。成品茶叶样本超标率为100%，六六六检出率为89%，铜超标率为61%，铅超标率为50%。生产过程农药的不合理使用是造成成品茶叶中农药六六六超标的主要原因，加工过程不清洁是造成成品茶叶中重金属铅、铜超标的主要原因。

Researching on tea pollution track in Chongqing

The soil environment quality of investigating area accords with NY/T 391-2000 Environmental technical terms for green food production area, 75% of the soil samples accord with NY 5199-2002 Environmental terms for organic tea production area standard，BHC and DDT aren’t detected in these soil samples, Environment quality of tea production area is very good. By detecting BHC, DDT, Cu, Pb in the tea samples, estimating with NY 5017―2001 No social effects of pollution food Tea standard, 0 % of fresh tea samples doesn’t accord with the standard, 11% of finished product tea samples doesn’t accord with the standard, the pollutant is Cu. Estimating with NY 5196―2002 organic tea standard, 95.2% of fresh tea samples doesn’t accord with the standard, the pollutants are BHC and Pb in the tea samples, percentage of the tea samples which BHC is detected out in is 95.2, percentage of the tea samples which content of Pb doesn’t accord with the standard is 9.5. 100% of finished product tea samples doesn’t accord with the standard, percentage of the tea samples which BHC is detected out in is 89, percentage of the tea samples which content of Cu doesn’t accord with the standard in is 61, percentage of the tea samples which content of Pb don’t accord with the standard in is 50. Pesticide irrationality use in production is the main cause of BHC being detected out in finished product tea samples; uncleanness machining is the main cause of content of Cu and Pb being not according with the standard in finished product tea samples.