生态环境学报2016，Vol.25Issue(9)：1534-1539,6.DOI:10.16258/j.cnki.1674-5906.2016.09.017
生物质炭对根际土壤中镉形态转化及水稻镉累积的影响
Effects of Straw Biochar on Rhizosphere Soil Cd Forms Transformation and Cd Accumulation in Rice
摘要
Abstract
A pot experiment and Tessier continuous shape analysis method was conducted to study effect of rhizosphere and non rhizosphere soil forms transformation of Cd and accumulation of Cd in rice by applying different amount (0.0, 2.5, 5.0, 10.0 g·kg-1) of biochar, under different levels (1.0, 2.5, 5.0 mg·kg-1) of Cd-contaminated. The results showed that, (1) The application of biochar could effectively reduce the availability of Cd in rhizosphere and non rhizosphere soil.Application of biochar reduced the content of ex-changeable, carbonate bound, Fe Mn oxide bound and organic bound Cd in rhizosphere and non rhizosphere soil by as high as 34.64% and 28.15%, 49.27% and 63.82%, 34.58% and 24.59%, 60.04% and 49%, respectively, and increased the content of residual Cd by as high as 14.79% and 16.57%, respectively. The treatment of 10.0 g·kg-1 biochar had the most significant effect. Under different treatments, forms transformation of Cd had significant change and there were differences between the rhizosphere and non rhizosphere. Under the low and middle levels of Cd-contaminated, the forms transformation of Cd tended to be consistent in rhizosphere and non rhizosphere soil, but the content of Cd was different. Under the high level of Cd-contaminated, the biochar could cause forms transformation of Cd in rhizosphere and non rhizosphere, but it was not significant. (2) The application of biochar could significantly decrease the Cd content in rice aerial part and root, and the accumulation of Cd in rice root was higher than that of in the aerial part. Under different levels of Cd-contaminated, compared with B0, applying different amount of biochar reduced the content of Cd in rice aerial part and root by as high as 42.51% and 22.86%, respectively. The maximum content of Cd in root was 2.63 times higher than that in the aerial part. Treatment of amendment of 10.0 g·kg-1 biochar is the most effective in the rice.关键词
生物质炭/镉/根际土壤镉形态/水稻/累积Key words
biochar/Cd/Cd forms of rhizosphere and non-rhizosphere soil/rice/accumulation分类
资源环境引用本文复制引用
赵青青,王海波,夏运生,史静..生物质炭对根际土壤中镉形态转化及水稻镉累积的影响[J].生态环境学报,2016,25(9):1534-1539,6.基金项目
国家自然科学基金项目（41301349）；云南省应用基础研究计划项目 （）
