生态学杂志2017，Vol.36Issue(7)：1941-1948,8.DOI:10.13292/j.1000-4890.201707.011
镉钝化剂与尿素配施对土壤镉钝化效果的影响
Effects of passivators and urea on soil Cd availability
摘要
Abstract
In the current research,an incubation experiment was conducted to test the passivation effect of biochar (B),sepiolite (S) and phosphorite (P) in combination of urea application on cadmium (Cd) availability in order to explore the effective materials for the development of Cd-passivation fertilizers.The results showed that surface area,specific surface area and functional group of passivators B,S and P were all increased after acid modification.Compared to the treatments without application of passivators,all the treatments with application of passivators alone or in combination decreased available Cd content,among which,S+P exhibited the best passivation effect,and available Cd content decreased by 23％.Compared to the application of urea alone,the application of urea combined with passivators decreased available Cd content and S+P treatment showed the best effect.Passivator addition can alleviate soil acidification caused by the urea-N transformation,increase the soil pH,and reduce the availability of Cd to a certain extent.The results suggest that acid modified P and S can be used in the development of new type toxic metal-passivation fertilizers.关键词
土壤/镉污染/钝化剂/肥料Key words
soil/Cd pollution/passivator/fertilizer引用本文复制引用
于春晓,张丽莉,杨立杰,李东坡,武开阔,崔亚兰,薛妍,武志杰..镉钝化剂与尿素配施对土壤镉钝化效果的影响[J].生态学杂志,2017,36(7):1941-1948,8.基金项目
国家科技支撑计划课题(2015BAD05B03)和国家重点研发计划课题(2016YFD0300904)资助. （2015BAD05B03）
