期刊论文

Impacts of Silicon Fertilizer as Base Manure on Cadmium Bioavailability in Soil and on Cadmium Accumulation in Rice Plants

Liao, Bo-Han(liaobh1020@163.com)

中文

环境科学

0250-3301

2017

38

12

5299-5307

10.13227/j.hjkx.201704210

农业部财政部科研专项（农办财函2016）； 国家自然科学基金项目（41501344）；

本校为其他机构

为研究硅肥对土壤Cd生物有效性以及水稻累积重金属Cd的影响,模拟土壤低Cd污染水平(Cd总量为0.72 mg·kg~(-1))和土壤高Cd污染水平下(Cd总量为5.08 mg·kg~(-1)),土壤基施0、15、30、60 mg·kg~(-1)的硅肥,进行水稻盆栽种植实验.结果表明,施用15 ~ 60 mg·kg~(-1)硅肥能提升水稻各生育期土壤的pH值,降低土壤交换态Cd含量和TCLP提取态Cd含量24.2% ~ 43.7%,12.7% ~ 46.8%,土壤中Si能与Cd形成Si-Cd复合物,降低土壤Cd的生物有效性,且降低效果在土壤低Cd污染水平时优于高Cd污染水平.硅肥提升水稻地上部的生物量尤其是产量.土壤低Cd污染水平下,Si对土壤Cd向水稻地上部的转运有促进和阻碍两种作用,施用量...

The impacts of silicon (Si) on cadmium (Cd) bioavailability in soil and Cd accumulation in rice plants were investigated in pot experiments with rice (Oryza sativa L.) cultivation. Silicon fertilizer as the base manure (Si 0, 15, 30, and 60 mg·kg-1) was added in simulated slightly Cd-contaminated soil (total soil Cd of 0.72 mg·kg-1) and severe Cd-contaminated soil (total soil Cd of 5.08 mg·kg-1). It indicated that the application of 15-60 mg·kg-1Si before the rice was transplanted improved soil pH values and reduced the contents of exchangeable-Cd and TCLP extractab...