文献类型：期刊文献

中文题名：雷竹林土壤各形态硒分布及其生物有效性

英文题名：Selenium Fractionation and Bio-availability in Phyllostachys praecox Stand Soil

作者：丁中文[1] 刘云[2] 谢锦忠[2] 周君刚[1] 张玮[2] 孙雪忠[1]

第一作者：丁中文

机构：[1]浙江省富阳市林业局;[2]中国林科院亚热带林业研究所

年份：2010

期号：6

起止页码：8-13

中文期刊名：世界竹藤通讯

外文期刊名：World Bamboo and Rattan

基金：浙江省自然科学基金项目"富硒竹笋培育机理研究"(M303369);浙江省科技厅一般科技项目"保健型富硒竹笋高效培育技术研究"(2008C32010);2008年浙江省农业资金转化项目"保健型富硒雷竹笋高效培育技术集成与示范"

语种：中文

中文关键词：雷竹;土壤;硒;生物有效性

外文关键词：Phyllostachys praecox; soil; selenium; bio-availability

分类号：S667.106.1

摘要：应用连续浸提的方法研究了浙江省富阳市主产雷竹(Phyllostachys praecox)的7个乡镇的8片雷竹试验林的土壤硒含量及其形态分布。结果表明,永昌镇测试土壤0～15cm土层自然总硒含量达到0.4856mg/kg(风干土),超过我国表层土壤中硒含量的平均值0.29mg/kg,其他几处土壤硒含量均处于平均值左右。雷竹林0～15cm土层总硒含量极显著高于15～30cm土层总硒含量。土壤各形态硒分布中,有机物-硫化物结合态硒及元素态硒是采样土壤中硒的主要存在形态,且与土壤总硒含量呈显著正相关。可溶态硒含量除与铁-锰氧化物结合态硒含量呈负相关外,与其他形态硒均没有相关性,而与有机质含量呈极显著正相关。竹笋与竹鞭硒含量与0～15cm土层有效硒含量之间均达到显著水平。
The selenium content,fractionation and bio-availability in the soil of 8 Phyllostachys praecox stands in 7 townships of Fuyang,Zhejiang Province,were studied using the sequential extraction technique. The results showed that natural selenium content in Yongchang Township in 0~15 cm soil layer （0.4 856 mg/kg） exceeded the national average selenium content in surface soil （0.29 mg/kg）,and the others fell in category of average content. The total selenium content in the 0~15 cm soil layer of Ph. praecox stands was significantly higher than that in the 15~30 cm soil layer. Se extracted by 5% K2S2O8-1：1HNO3 was the predominated Se fraction in these soils,significantly positively correlated to total selenium content. Water soluble Se concentration was negatively correlated to Se extracted by 2.5 mol/LHCl,and significantly positively correlated to organic matter content. The results also showed that the Se content in both bamboo rhizome and shoot was significantly correlated to the Se extracted by NaHCO3 in soil.