《浙江省典型水稻产区土壤水稻系统重金属迁移特征及定量模》由会员分享，可在线阅读，更多相关《浙江省典型水稻产区土壤水稻系统重金属迁移特征及定量模（9页珍藏版）》请在金锄头文库上搜索。
1、S3j0.05)偏低, 需增加环境变量, 并做进一步研究以提高预测精度。 1oM 土壤水稻系统 重金属 迁移模型 控制因素 富集系数 风险评价 ms| : S511 DSM : A cI| : 1671-3990(2016)02-0226-09 Characteristics and quantitative model of heavy metal transfer in soil-rice systems in typical rice production areas of Zhejiang Province*ZHAO Keli1, FU Weijun1*, DAI Wei1, YE Z
2、hengqian1, GAO Wei2(1. School of Environmental and Resource Sciences, Zhejiang Agriculture and Forestry University, Linan 311300, China; 2. Jiuzhaigou National Park Administration, Aba Autonomous Prefecture, Sichuan Province, Jiuzhaigou 623400, China) Abstract The understanding of characteristics of
3、 heavy metal transfer in soil-rice systems can improve soil quality in production areas and guide the safe production of rice. We collected soil and rice samples from three typical rice production areas (Nanxun, Shengzhou and Wenling) located in the northern, central and southern parts of Zhejiang P
4、rovince. The controlling factors of heavy metal transfer were studied based on a transfer model set up for hybrid rice and japonica rice. The objective of the study was to identify transfer traits of heavy metals in soil-rice systems in typical rice production areas in Zhejiang Province and to guide
5、 safe agricultural production. The results suggested that the physico-chemical properties were different in the three areas. pH (mean value of 5.52), organic matter (mean value of 39.4 gkg1), EC and heavy metal fractions contents in soil in Shengzhou area were lower than those in the other two produ
6、ction areas. Sand content of soil in Shengzhou 2 uS : 8ur d%M+# 227 http:/ area was higher than that in the other two areas. Heavy metals in soils and rice were significantly different from each other of rice production areas. Heavy metals (Cd, Cu and Zn) contents in soil in Wenling area were signif
7、icantly higher than those in the other two areas. Then heavy metals contents in rice in Shengzhou area were significantly higher than those in Nanxun area (P 0.05) was poor. In that case, it was necessary to conduct further research in order to improve the accuracy of the model by either using more
8、of the environmental variables or adjusting the variables. Keywords Soil-rice system; Heavy metal; Transfer model; Controlling factor; Enrichment index; Risk evaluation rjT38 , yNrVYVjTljb , ry34+7$4 2 (V 2)bZsTV 3 uc(iAsb4 CdaCu ZncA2Mc ; 2a4 NicAs ; 74 CdaCu ZncsAb 3 urcs?piBburc42u , 7ucu , r d3r
9、 , .B , H9Vr?zV3rb 表2 研究区土壤和水稻重金属全量 Table 2 Total heavy metals contents of the paddy soils and rice in the study areas rc Soil content (mgkg1) cRice content (mgkg1) u Study area Cd Cu Ni Zn Cd Cu Ni Zn 2 Nanxun 0.210.07b 31.067.45b 32.146.75a 106.8230.05b 0.010.015b 2.490.74b 0.130.173c 14.282.70b S
10、hengzhou 0.200.09b 28.6413.36b 27.0322.04a 98.7432.06b 0.090.10a 2.981.08a 0.350.28a 22.413.54a4 Wenling 0.310.38a 41.1319.74a 33.8912.69a 137.0333.83a 0.070.105a 3.090.96a 0.220.23b 20.694.71a2.3 rcs 3 urcN_K , ?_ , 3 ur(r , cb 2ur Cd (csY 0.099 mgkg1 0.093 mgkg1, CdM(csY 0.063 mgkg1 0.068 mgkg1, C
11、d (csY 0.009 mgkg1 0.010 mgkg1, Cd ?(csY0.015 mgkg1 0.017 mgkg1(V 3)buM1 , 4r Cd d? (aM )c(2 , 7?c52b 3ur CucN_K7?_ , Cu M(csY 7.41 mgkg1a2.74 mgkg1 6.85 mgkg1, Cu 230 S3j4u 2ub 2.5 s ra#M , KDEs (V 4)b%ME(R)y7is , W9Mb Cd , Mr Cd E R sY 0.65 0.56, rAbr CdE% R sY 0.50 0.76, 9A , rEAbr CuE(rA , r? CuAE , 7ErAb Cd CuM1 , NiEA (R=0.20), 7r
