灌溉排水学报2017，Vol.36Issue(2)：25-31,7.DOI:10.13522/j.cnki.ggps.2017.02.004
钝化修复对不同水稻品种镉累积效应及土壤特性的影响
Effects of Immobilization Remediation of Cadmium Contaminated Paddy Soil on Cadmium Accumulation and Soil Properties in Different Rice Varieties
摘要
Abstract
In order to study the difference of the accumulation of Cd in different rice varieties under palygorskite immobilization remediation of cadmium contaminated paddy soil,pot experiments were conducted to investigate the effect of palygorskite immobilization remediation of cadmium contaminated paddy soil on Cd accumulation in different rice varieties,and soil enzyme activity and nitrogen and phosphorus availability.The results showed that T You 272 rice biomass was 7.91%higher than the Feng You 9 rice,but there was no statistically significant difference.Under palygorskite immobilization remediation,the soil pH values of planting T You 272 and Feng You 9 were increased by 0.33~0.46 and 0.40~0.53,respectively.Under PL1F,PL2F and PL3F treatment,the maximum decrease of soil available Cd was 13 .59%,and the Cd of brown rice was decreased by 20.51%~50.28%,and the Cd content of brown rice under PL3F treatment was 0.19 mg/kg.In addition,the maximum de-crease of soil available Cd was 25.08%,and the maximum reduced of brown rice Cd was 37.50% under PL1T, PL2T and PL3 T treatment,and the Cd content of brown rice under PL3 T treatment was 0.35 mg/kg.The soil en-zyme activity was increased gradually with the increase of the amount of palygorskite added,and the soil enzyme activity of T You 272 was higher than that of Feng You 9.With the increase of the amount of palygorskite added, the soil alkali solution nitrogen had no significant difference in different treatments,but the content of available phosphorus in soil decreased gradually.Compared with CK,the contents of soil available phosphorus under PLF and PLT treatments could be decreased by 7.08%~18.08%and 9.02%~19.59%,respectively.The research re-sults could provide the scientific basis for immobilization remediation of cadmium contaminated paddy soil com-bined with low Cd accumulation of rice varieties.关键词
坡缕石/镉/土壤/钝化修复/水稻/品种差异Key words
palygorskite/cadmium/soil/immobilization remediation/rice/genotype difference分类
资源环境引用本文复制引用
孙国红,李剑睿,梁学峰,黄青青,徐应明..钝化修复对不同水稻品种镉累积效应及土壤特性的影响[J].灌溉排水学报,2017,36(2):25-31,7.基金项目
中国农业科学院创新工程项目(2013-cxgc-xym,2014-cxgc-xym) （2013-cxgc-xym,2014-cxgc-xym）
国家自然科学基金项目(21177068) （21177068）
天津市科技支撑计划项目(14ZCZDSF00004) （14ZCZDSF00004）
天津市农业科技成果转化与推广项目(201404100) （201404100）
