农业环境科学学报2016，Vol.35Issue(12)：2345-2352,8.DOI:10.11654/jaes.2016-0553
秸秆还田配施无机改良剂对稻田土壤镉赋存形态及生物有效性的影响
Effects of combined application of straw and inorganic amendments on cadmium speciation and bioavailability in paddy soil
摘要
Abstract
To investigate effects of straw and inorganic amendments on cadmium(Cd)speciation and bioavailability in paddy soil, field ex-periments were conducted in Jingyang County, Deyang. The results showed that Cd content decreased significantly by combined application of straw-returning(rape straw and wheat straw)and inorganic amendments(sepiolite, lime and calcium magnesium phosphate fertilizer)in brown rice. Cd content in brown rice was decreased by 36.75%under rape straw and sepiolite, co-treatment. However, Cd content in the stem increased by 31.46%~140.73%after the combination application of rape straw with three inorganic amendments. The increasing might have a negative effect on straw returning and utilization. At the tillering stage of rice, the combination use of wheat straw and lime exhibited more efficient in decreasing exchangeable Cd in soil, which was decreased by 50.47%. At the mature stage of rice, the combination use of wheat straw with calcium magnesium phosphate fertilizer exhibited more efficiency in decreasing exchangeable Cd in soils, which was de-creased by 58%. According to the regression analysis, soil Cd speciation transformed from higher availability to lower availability, thus re-ducing Cd accumulation in rice. Therefore, the combination application of rape straw with sepiolite, and wheat straw with lime application showed more efficiency in decrease of soil Cd availability, as well as the Cd accumulation in rice.关键词
镉/秸秆还田/无机改良剂/水稻Key words
Cd/straw-returning/inorganic amendments/rice分类
资源环境引用本文复制引用
张庆沛,李冰,王昌全,杨兰,肖瑞,郑顺强,郭勇..秸秆还田配施无机改良剂对稻田土壤镉赋存形态及生物有效性的影响[J].农业环境科学学报,2016,35(12):2345-2352,8.基金项目
国家科技支撑计划项目（2012BAD14B18）；四川省科技支撑计划项目 （）
