期刊论文

Effect of palygorskite immobilization combined with foliar silicon fertilizer application on Cd accumulation in rice

中文

农业环境科学学报

1672-2043

2016

35

9

1633-1641

10.11654/jaes.2016-0838

2013-cxgc-xym:中国农科院创新工程项目 2014-cxgc-xym:中国农科院创新工程项目 21177068:国家自然科学基金

本校为第一机构

采用盆栽试验,研究了坡缕石钝化与喷施叶面硅肥联合处理对水稻吸收累积Cd效应的影响。试验结果表明,单独喷施叶面硅肥能够增加水稻产量,可以不同程度地降低水稻地上部Cd含量及Cd从根系向地上部的转运能力。与空白对照相比,糙米、颖壳和秸秆中Cd含量最大可分别降低34.9%、30.1%和34.0%,且在水稻不同生育期喷施硅肥对Cd在地上部累积的抑制效果依次为分蘖期+齐穗期>分蘖期>齐穗期。盆栽试验中添加1.0%的坡缕石后能够显著降低土壤中Cd的生物有效性,糙米、颖壳、秸秆以及根系中Cd含量分别比空白对照降低39.5%、28.6%、35.3%和20.9%。坡缕石钝化处理并联合在水稻分蘖期和齐穗期分别喷施0.1%~ 0.4%叶面...

Pot experiments were conducted to investigate the effect of palygorskite immobilization combined with foliar silicon fertilizer application on cadmium accumulation in rice. The results showed that foliar application of Si obviously increased the dry weight of grain(with husk)and straw in rice grown in Cd contaminated soil, reduced Cd concentrations in grain, husk and straw and the Cd translocation to shoot, while Cd was more sequestrated in root. In comparison with the control treatment, the foliar application of Si led to a maximal decrease in...