Top (0~20 cm)and sub-layer (20~40 cm)soil samples as well as corresponding tea leaf samples were collected at seventy-nine tea gardens in Anxi County and other areas, Fujian Province. Lead concentrations of tea leaves as well as soil geochemical indicators including macro-and micro-elements were determined. There is a significant correlation between the lead concentration of tea leaves and that of the corresponding soils. Therefore, a linear regression model was established, and transfer factors(Ft) for lead from soils to tea leaves was calculated. It seems that Ft values are affected by the concentrations of lead, manganese, phosphorus and zinc in soils. The critical value of soil lead for tea production was derived from the regression model and Ft value according to tea quality criteria. The result demonstrates that the lead values of tea uptake from soils would not exceed tea quality criteria (5×10-6) under normal soil lead concentration. Multivariable linear regression model can preferably explain the relationship between lead concentration in tea leaves and soil physicochemical indicators.
周国华, 孙彬彬, 贺灵, 白金峰, 曾道明, 候树军, 刘占元. 安溪土壤-茶叶铅含量关系与土壤铅临界值研究[J]. 物探与化探, 2016, 40(1): 148-153.
ZHOU Guo-Hua, SUN Bin-Bin, HE Ling, BAI Jin-Feng, ZENG Dao-Ming, HOU Shu-Jun, LIU Zhan-Yuan. The relationship of lead concentration between soils and tea leaves and the critical value of lead for soil in Anxi, Fujian Province. Geophysical and Geochemical Exploration, 2016, 40(1): 148-153.
[1] Vries W D, R kens P F A M, Schütze G. Critical soil concentrations of cadmium, lead and mercury in view of health effects on humans and animals[J]. Rev Environ Contam Toxicol, 2007, 191:91-130.[2] 石元值,韩文炎,马立锋,等.不同茶园土壤中外源铅的形态转化及其生物有效性[J].农业环境科学学报, 2010, 29(6):1117-1124.[3] 杨金燕,杨肖娥,何振立.土壤中铅的来源及生物有效性[J].土壤通报, 2005, 36(5):765-772.[4] 康孟利,薛旭初,骆耀平,等.茶树与土壤中铅的存在形态与分布[J].浙江农业科学, 2006(3):280-282.[5] Sarkar D, Andra S S, Saminathan S K M,et al. Chelant-aided enhancement of lead mobilization in residential soils[J]. Environmental Pollution, 2008, 156:1139-1148.[6] Zeng F R, Ali S, Zhang H T,et al. The influence of pH and organic matter content in paddy soil on heavy metal availability and their uptake by rice plants[J]. Environmental Pollution,2011,159:84-91.[7] 章明奎,方利平,张履勤.酸化和有机质积累对茶园土壤铅生物有效性的影响[J].茶叶科学, 2005, 25(3):159-164.[8] 石元值,马立峰,韩文炎,等.浙江省茶园中铅元素含量现状研究[J].茶叶科学, 2003, 23(2):163-166.[9] Shi J C, Wang G, He Y,et al. Lead accumulation in Westlake Longjing tea:non-edaphic genesis as revealed by regional scale estimate[J]. J Soils Sediments, 2010, 10:933-942.[10] Lu Y F, Yang H M, Ma L Y, et al. Application of Pb isotopic tracing technique to constraining the source of Pb in the West Lake Longjing tea[J]. Chin. J. Geochem., 2011, 30:554-562.[11] 张方舟,林郑和,邻龄盛,等.茶叶加工过程中铅变化的研究[J].福建茶叶, 2008,3:23-24.[12] Jin C W, Zheng S J, He Y F, et al.Lead contamination in tea garden soils and factors affecting its bioavailability[J]. Chemosphere 59, 2005, 1151-1159.[13] 宗良纲,周俊,李嫦玲,等.不同生长期茶树对土壤中铅的吸收及体内运移特性研究[J].植物研究, 2007, 5:596-600.[14] 苏祝成,陆德彪,朱有为,等.浙江山区茶园重金属污染状况研究[J].江苏农业科学, 2011,1:339-341.[15] 高海荣.武夷岩茶与土壤中铅、铬的相关性[J].生态学杂志, 2012, 31(12):3203-3206.[16] Yaylali-Abanuz G, Tüysüz N. Heavy metal contamination of soils and tea plants in the eastern Black Sea region, NE Turkey[J]. Environ Earth Sci, 2009, 59:131-144.[17] 韩文炎,杨亚军,梁月荣,等.茶树体内铅的吸收累积特性研究[J].茶叶科学, 2009, 29(3):200-206.[18] 徐丽红,吴全聪,周惠娟,等.浙西南地区茶园土壤和茶叶中重金属的监测与污染评价[J].农业环境与发展, 2012, 5:86-90.[19] 郭雅玲,王果,罗丹,等.福建铁观音茶园土壤中铅、镉、砷、铬、汞、铜、氟的环境质量现状分析[J].中国生态农业学报, 2011, 19(3):676-681.[20] 周国华,曾道明,贺灵,等.福建铁观音茶园生态地球化学特征[J].中国地质, 2015, 42(6):2008-2018.[21] 李丽光,何兴元,曹志强,等.土壤-作物系统中铅的研究进展[J].生态学杂志, 2004,23(1):78-82.[22] 汤茶琴,张定,黎星辉.茶树及成品茶叶中铅的研究进展[J].福建茶叶, 2006, 2:15-17.[23] Wang G, Su M Y, Chen Y H, et al. Transfer characteristics of cadmium and lead from soil to the edible parts of six vegetable species in southeastern China[J]. Environmental Pollution, 2006, 144:127-135.[24] Manecki M, Bogucka A, Bajda T, et al. Decrease of Pb bioavailability in solis by addition of phosphate ions[J]. Environ Chem Lett, 2006, 3:178-181.[25] Miretzky P, Fernandez-Cirelli A. Phosphates for Pb immobilization in soils:a review[J]. Environ Chem Lett, 2008, 6:121-133.
