摘要
为探究生物有机肥治理镉污染土壤的可行性及对土壤重金属污染修复的效果,采集河南省淅川县2种镉污染土壤,分别设置6种施肥处理:CK(不施用任何物料)、NPK(常规施NPK肥)、NPK+0.5%OF(常规施肥+0.5%商品有机肥)、NPK+1%OF(NPK+1%商品有机肥)、NPK+0.5%BF(NPK+0.5%生物有机肥)和NPK+1%BF(NPK+1%生物有机肥),测定种植前后土壤全镉含量、土壤各化学形态镉、玉米植株根系及籽粒镉含量。结果显示,以添加1%生物有机肥的治理效果最佳,NPK+1%BF处理下2种土壤有效态镉含量相较于NPK+1%OF降幅分别为19.74%、7.09%;施用有机物料降低土壤弱酸提取态镉含量,提高残渣态镉含量,NPK+1.0%BF弱酸提取态镉含量相比CK下降11%、残渣态镉上升16%;施用有机物料各处理玉米植株根系、籽粒镉含量显著降低,以NPK+1.0%BF处理效果最佳,相比NPK处理,土壤Ⅰ的玉米根系、籽粒镉含量降幅达34.41%、31.59%。综上,在镉污染土壤中施用生物有机肥,可显著降低土壤有效态镉含量,促进土壤弱酸提取态镉向残渣态镉转化,降低镉危害;玉米根系及籽粒镉含量均显著下降,综合治理效果表现为生物有机肥优于商品有机肥。
Two types of cadmium(Cd)contaminated soils in Xichuan County,Henan Province were collected to study the feasibility of using bio-organic fertilizers to treat cadmium contaminated soils and the effectiveness of remediating heavy metal pollution in soil.6 treatments of fertilization including CK(without applying any materials),NPK(conventional application of NPK fertilizer),NPK+0.5%OF(conventional fertilization+0.5%commercial organic fertilizer),NPK+1%OF(NPK+1%commercial organic fertil⁃izer),NPK+0.5%BF(NPK+0.5%bio-organic fertilizer),and NPK+1%BF(NPK+1%bio-or⁃ganic fertilizer)were set up.The content of total cadmium in the soil,the chemical forms of cadmium in the soil,and the content of cadmium in the roots and seeds of maize were measured before and after planting.The results showed that the effect of NPK+1%BF was the best,and the content of available cadmium in two types of soil under NPK+1%BF decreased by 19.74%and 7.09%compared to that under NPK+1%OF.The application of organic materials reduced the content of cadmium in the weakly acid-extractable state in soil and increased the content of cadmium in the residual state.The content of cadmium in the weak⁃ly acid-extractable state in soil under NPK+1.0%BF decreased by 11%compared to that under CK,while the content of cadmium in the residual state increased by 16%.The application of organic materials significantly reduced the content of cadmium in the roots and seeds of maize,with the NPK+1.0%BF hav⁃ing the best effect.Compared with NPK treatment,the content of cadmium in roots and seeds of maize in soil I decreased by 34.41%and 31.59%,respectively.It is indicated that applying bio-organic fertilizers in cadmium contaminated soil can significantly reduce the content of available cadmium in the soil,promote the transformation of cadmium in the weakly acid-extractable state to cadmium in the residual state,and re⁃duce the hazards of cadmium.The content of cadmium in roots and seeds of maize significantly decreases,and bio-organic fertilizer is superior to commercial organic fertilizer in terms of the comprehensive effect.
作者
陈礼瀚
吕奇蔚
张光正
胡红青
CHEN Lihan;LÜQiwei;ZHANG Guangzheng;HU Hongqing(College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China;Wuhua Biotechnology Co.Ltd.,Xichuan county,Henan Province,Xichuan 474450,China)
出处
《华中农业大学学报》
CAS
CSCD
北大核心
2024年第5期126-131,共6页
Journal of Huazhong Agricultural University
基金
国家博士后基金项目(2021M691165)。
关键词
镉
生物有机肥
白腐菌
土壤镉形态
镉污染土壤
土壤重金属污染修复
玉米
cadmium(Cd)
bio-organic fertilizers
white rot fungi
form of cadmium in soil
cadmi⁃um contaminated soil
remediation of heavy metal pollution in soil
maize
