期刊论文

Characteristics and Differences of Cadmium Absorption and Accumulation in Different Parent Soil-Rice Systems

中文

水土保持学报

1009-2242

2019

33

4

342-348

10.13870/j.cnki.stbcxb.2019.04.048

(2015BAD05B02):国家科技支撑计划项目 (农办财函〔2016〕6号):农业部财政部重大专项 (2006180):湖南省重点学科建设项目

本校为第一机构

通过选取土壤有效态镉(Cd)含量相近、母质不同的水稻土河沙泥(河流冲积物发育)和紫泥田(紫色砂页岩母质发育),添加不同浓度的外源Cd(0,0.5,1,2,5 mg/kg)模拟Cd污染稻田土壤进行盆栽试验,研究不同母质稻田土壤Cd胁迫条件下水稻不同生育期对Cd吸收累积的差异,并推算出土壤Cd环境安全临界值.结果表明,水稻生育期2种土壤有效态Cd含量均在分蘖期最高,河沙泥有效态Cd含量平均为0.47 mg/kg,紫泥田平均为0.36 mg/kg,同一外源Cd水平下,河沙泥土壤有效态Cd含量高于紫泥田.对河沙泥而言,随着外源Cd浓度的增加,水稻总生物量呈现先增加后下降的趋势,当外源Cd浓度为1 mg/kg时达到最大生物量,为47.11 g/pot;而紫...

Alluvial sandy soil(developed from river alluvium parent materials)and purple clayey soil(developed from purple sandy shale parent materials)with similar available cadmium (Cd)content and different parent materials were selected to conduct pot experiments,and to study the difference of Cd absorption and accumulation at different growth stages of rice under Cd stress conditions in different parent material paddy soils,as well as to calculate the critical value of soil Cd environmental safety.Different concentrations of exogenous Cd(0, 0.5,1,2,5mg/kg)were added to the soils to simulate the Cd co...