期刊论文

Spatial variation of agricultural soil Cd species and the nanohydroxyapatite resistance control in a typical small watershed

中文

生态学杂志

1000-4890

2019

38

9

2799-2804

10.13292/j.1000-4890.201909.005

国家自然科学基金项目(51409101) 国家重点研发计划项目(2017YFD0801505) 重金属污染耕地安全高效利用湖南省工程研究中心开放课题(TGOP-002)资助.

本校为第一机构

沿浏阳铁山河流域采集6个土壤样品( S1 ~ S6),分析其Cd含量及形态空间差异特征,并结合室内淹水模拟实验,研究淹水条件下纳米羟基磷灰石添加量对不同样品Cd有效性与形态转化的影响。结果表明,从流域上游到下游,土壤总镉含量分别为1.14、1.37、 1.98、7.44、7.45、6.99 mg·kg~(-1),有效态Cd所占百分比依次为51.75%、40.15%、39.39%、 16.40%、28.86%、29.76%,总量与有效态Cd的空间差异均非常明显,而有效态Cd所占百分比与土壤pH呈显著负相关。淹水可降低土壤Cd的有效性,且随着淹水时间延长,土壤有效态Cd逐渐向残渣态转化。添加纳米羟基磷灰石可明显降低土壤有效Cd含量,且随着添加量增加,阻控效果越...

Six soil samples were collected from Tieshan watershed,a typical mining small agricultural watershed in Liuyang City,which were used to analyze spatial variation of soil Cd content and its species. Effects of various nanohydroxyapatite addition doses on soil Cd availability and form transformation were examined using indoor flooding simulation experiment. Results showed that total Cd content in soils was 1.14,1.37,1.98,7.44,7.45 and 6.99 mg·kg~(-1) from upstream to downstream of the watershed,with the percentage of available Cd being 51.75%, 4...