摘要
利用生物量高的经济作物进行轮作,可在加快修复土壤Cd污染进程的同时获得一定的经济效益。本研究在长沙市望城区群力村Cd轻度污染的土壤进行冬季种植红叶甜菜、夏季复种植花生和春末种植油葵、夏季复种植花生的轮作模式试验,探究重金属修复潜力。结果表明:花生、油葵、红叶甜菜各部位Cd富集系数除花生果实外均大于1,对Cd均有较强的富集能力。油葵-花生、红叶甜菜-花生轮作模式种植一季可提取土壤Cd总量分别为40.80 g·hm^-2和53.34 g·hm^-2。红叶甜菜-花生轮作将土壤Cd含量由0.316 mg·kg^-1降至0.286 mg·kg^-1,油葵-花生轮作一季将土壤Cd含量由0.316 mg·kg^-1降至0.283 mg·kg^-1。研究表明,红叶甜菜-花生、油葵-花生轮作模式均对土壤重金属Cd有较好的修复潜力。
Rotation of cash crops with large biomass can accelerate the process of soil Cd pollution remediation and achieve certain econom⁃ic benefits.In this study,two plant rotation patterns were carried out in soil mildly contaminated with Cd(Qunli Village,Wangcheng Dis⁃trict,Changsha City,China)to explore their remediation potential for heavy metal pollution in soil.The red leaf beet and peanuts were grown in winter and summer,respectively,for the first pattern and the oil sunflower and peanuts were planted in late spring and summer,re⁃spectively,for the second pattern.The experiment results demonstrated that,except peanut seed,the Cd bioaccumulation coefficients in all parts of peanut,oil sunflower,and red leaf beet were greater than 1,exhibiting superior Cd accumulation ability.The total amount of soil Cd extracted in the rotation cultivation mode of oil sunflower-peanut and red leaf beet-peanut was 40.80 g·hm^-2 and 53.34 g·hm^-2,respective⁃ly.Red leaf beet-peanut rotation could reduce the content of Cd from 0.316 mg·kg^-1 to 0.286 mg·kg^-1,and oil sunflower-peanut rotation could reduce the content of Cd from 0.316 mg·kg^-1 to 0.283 mg·kg^-1 in soil.Both rotation patterns showed considerable capability for the remediation of Cd contaminated soil.
作者
涂鹏飞
谭可夫
陈璘涵
杨洋
袁婧
陈奕暄
杨耀东
曾清如
TU Peng-fei;TAN Ke-fu;CHEN Lin-han;YANG Yang;YUAN Jing;CHEN Yi-xuan;YANG Yao-dong;ZENG Qing-ru(College of Resources and Environment,Hunan Agricultural University,Changsha 410128,China;College of Bioscience and Technolo⁃gy,Hunan Agricultural University,Changsha 410128,China)
出处
《农业资源与环境学报》
CAS
北大核心
2020年第4期609-614,共6页
Journal of Agricultural Resources and Environment
基金
国家重点研发项目(2016YFD0800807)
长沙市科技计划项目(kq1801025)
国家自然科学基金项目(41701366)。
关键词
植物修复
镉
土壤
轮作
花生
红叶甜菜
油葵
phytoremediation
cadmium
soil
rotation
peanuts
red leaf beet
oil sunflower