CAJ | 학술논문

在滇池流域农田,重点是滇池滨湖区和入滇河流柴河流域,选择不同土地利用类型、不同种植年限大棚采集土壤样品进行气相色谱(ECD)分析.结果表明,试区土壤中有机氯农药(OCPs)检出率为95.9%,0CPs的残留量范围、平均值分别为nd～63.4 μg·kg-1、6.3 μg·kg-1,以p,Pp'-DDE为主要残留物,98.3%的样点达到国家<土壤环境质量标准>一级标准(＜50 μg·kg-1).与国内同类报道相比,滇池周边土壤中OCPs的残留较低.不同土地利用类型有机氯残留量排序为:设施栽培＞水稻田＞露天菜地＞荒草地＞坡耕地;不同大棚种植年限土壤中,棚龄长于15 a的OCPs残留量要明显高于棚龄短于15 a的,而棚龄短于15 a的,土壤中OCPs含量差异不明显.
재전지류역농전,중점시전지빈호구화입전하류시하류역,선택불동토지이용류형、불동충식년한대붕채집토양양품진행기상색보(ECD)분석.결과표명,시구토양중유궤록농약(OCPs)검출솔위95.9%,0CPs적잔류량범위、평균치분별위nd～63.4 μg·kg-1、6.3 μg·kg-1,이p,Pp'-DDE위주요잔류물,98.3%적양점체도국가<토양배경질량표준>일급표준(＜50 μg·kg-1).여국내동류보도상비,전지주변토양중OCPs적잔류교저.불동토지이용류형유궤록잔류량배서위:설시재배＞수도전＞로천채지＞황초지＞파경지;불동대붕충식년한토양중,붕령장우15 a적OCPs잔류량요명현고우붕령단우15 a적,이붕령단우15 a적,토양중OCPs함량차이불명현.
Surface soils(0～20 cm depth)of typical cultivated field were collected in Dianchi Lake watershed(especially Dianehi Lake side and Chaihe River watershed),and organochlorine pesticide residues(OCPs),represented with DDTs and HCHs,were analyzed by gas chromatography with ECD detector.The results showed that OCPs ranged from none to 63.4 μg·kg-1 were detected in 95.9% of the soil samples,and the average level was 6.3 μg·kg-1 The p,p'-DDE was the main OCPs component,which indicated that the residues in soils were possibly resulted from historical use of OCPs.The concentrations of DDTs and HCHs in 98.3% of samples were lower than 50 μg·kg-1,which showed that these soils had reached the first level of the National Soil Environment Quality Standard.The effect of soil utilization and history of greenhouse cultivation on the level of pesticide residues in soils were also discussed.The amount of pesticide residues according to different land use in order was shown as follows:greenhouse soil＞paddy soil＞open vegetable soil＞grassland soil＞sloping land soil.The concentrations of OCPs in soil samples with more than 15 years cultivated history were higher,while the difference of OCPs residues amount was not significant in soils during the first 15 year cultivation in greenhouse.Comparing with the reference data,the pollution burden in soils of Dianchi Lake watershed was lower than those in other areas of China.