大棚土壤重金属元素含量的评估与分析

依据中华人民共和国农业行业标准《绿色食品产地环境技术条件》NY/T 391-2000,采用单项污染指数与综合污染指数法,对忻州市忻府区东王村棚龄为1,3,6年共30个大棚土样的实测数据进行评价。结果表明,棚龄为1,3年的各项重金属元素的单项污染指数、综合污染指数均小于1,表明土壤未受污染,评定为合格。棚龄6年的各项重金属元素单项污染指数Hg(25号),Pb(21号),Cd(23号),Cr(23,24,25,27,30号)共8个和2个综合污染指数(25,27号)均大于1,表明土壤受轻度污染,不能满足绿色食品产地环境条件的要求。

Appiaisal and Analysis of Heavy Metal Elements Level in Shed Soil

Based on "Green Food Production Environmental and Technological Condition" NY/T391-2000,issued by P.R.China,field test data,methods of single pollution index and integrated pollution index were appplied,field test data were appraised for soil samples obtained from 30 sheds,with shed age of 1,3 or 6 years,in wangcun village,xinfu district of xinzhou City.The results showed that all pollution indexes from 1 or 3 years age sheds were less than 1,which suggested that the soil were safe nonpolluted.While eight single pollution indexes for soil samples from sheds at 6-year age,Hg(No.25),Pb(No.21),Cd(No.23),Cr(No.23,No.24,No.25,No.26,No.27 and No.30)and two integrated pollution indexes(No.25 and No.26)were higher tha 1,which means the soil were slightly polluted and they can't satisfy the necessary conditions for green food production.