农业环境科学学报2011，Vol.30Issue(12)：2467-2474,8.
江苏省典型茶园土壤硒分布特性及其有效性研究
Distribution and Availability of Selenium in Typical Tea Garden of Jiangsu Province, China
摘要
Abstract
As a trace element selenium(Se) is of great importance on human health and its contents in environment direcT1y affects the health and safety of human beings, animals and plants. Concentrations, distribution, and availability of Se in typical tea garden soils in Jiangsu Province were investigated and the governing factors were analyzed. 12 vertical profile samples and 22 top layers samples were collected. The results showed that the total Se content ranged from 0.10 mg·kg-1 to 1.78 mg ·kg-1 in tea garden soils of Jiangsu with an average of 0.50 mg kg-1 which is higher than the national average value. The average Se concentration in samples from Yixing(0.88 mg·kg-1) was significanT1y higher than that from other sampling sites(0.2S mg·kg-1). This indicated there existed relatively Se-rich top soils in Yixing, southern Jiangsu though Se in top soils was not rich in most areas of Jiangsu. Nevertheless, the activity index of Se was 4.94% in samples from Yixing. It was remarkably lower than the average value in Jiangsu(9.04%), which puts a disadvantage to produce Se-rich tea in Yixing. Availability of Se positively correlated to the pH and CEC of the soil. Therefore, increasing the soil pH or other practices of improving the conditions of soil in agricultural production could be potentially effective to culture natural Se-rich tea in Yixing. Se content was higher in the top layer of the soils indicating that biological accumulation plays a more significant role than eluviation in control the vertical distribution of Se. The results of this study can serve as a practical reference for both reasonable planning of the tea production and development of Se-rich tea industrialization in Jiangsu.关键词
茶园土壤/全硒/有效硒/活化率/剖面Key words
tea garden soil/ total Se/ available Se/ activity index/ profiles分类
资源环境引用本文复制引用
赵妍,宗良纲,曹丹,张倩,肖峻,汪润池..江苏省典型茶园土壤硒分布特性及其有效性研究[J].农业环境科学学报,2011,30(12):2467-2474,8.基金项目
江苏省"六大人才高峰"项目"土壤环境条件对农产品硒含量及形态分布的影响" （）
江苏省农业科技自主创新资金(CX(11)3042) （CX(11）
