摘要
通过盆栽试验,研究了传统水分管理条件下,生物质炭及牛粪有机肥的不同施用方式对土壤理化性质以及Cd在水稻中积累的影响。结果表明,各处理组土壤氧化还原电位(Eh)随淹水时间增加整体呈下降趋势,pH则波动变化趋近于中性。与对照组相比,有机物的施用能不同程度降低土壤中有效态Cd含量。生物质炭的施用显著降低了糙米中的Cd含量,且后期施用生物质炭降低效果更为显著。施用有机物能有效抑制水稻中Cd的积累,水稻根部、糙米、稻壳中Cd的含量随有机物施加量的升高而降低。有机物与生物质炭同时施用时,低含量有机物与后期施用生物质炭同时作用的处理组中的糙米Cd含量降低最为显著。
Through pot experiments,the effects of different application methods of biochar and cow dung organic matter on the physical and chemical properties of soil and the accumulation of Cd in rice were studied under traditional water management conditions.The results indicated that the soil Eh of each treatment group showed a downward trend with flooding time increasing,and the pH fluctuated with flooding time increasing then tended to be neutral.Compared with the control group,the application of organic matter reduced the content of available Cd in the soil to varying degrees.The application of biochar significantly reduced Cd content in brown rice,and adding biochar later had better reduction effect.The accumulation of Cd in rice was effectively inhibited by organic matter,and the Cd content in rice roots,brown rice and rice husks decreased with the increase of organic matter application.When the organic matter and biochar were applied to the soil at the same time,the Cd content of brown rice decreased most significantly in the low organic matter and later biochar treatment groups than other groups.
作者
潘婷
孙星星
张嘉伟
魏泓
许健
徐轶群
PAN Ting;SUN Xingxing;ZHANG Jiawei;WEI Hong;XU Jian;XU Yiqun(School of Environmental Science and Engineering,Yangzhou University,Yangzhou Jiangsu 225100)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2021年第3期332-337,共6页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.31372133,No.41472034)
扬州大学科技创新培育基金资助项目(No.2017CXJ054)。
关键词
水稻
有机物
生物质炭
淹水
Cd积累
rice
organic matter
biochar
flooding
Cd accumulation
