Effect of Ploughing Leguminous Green Manure Combined with Application of Different Passivators on Cd Bioconcentration of Capsicum annuum
Xu Jinyu
Chang Shanna
Chen Jianfeng
Chen Hua
Wang Wei
Wang Zhiyuan
Fan Hongli
Cao Weidong
Li Jingfang
Yin Mei
Fu Libo
Abstract：In order to study the effects of different passivators combined with green manure on soil availa-ble cadmium(Cd)and crop Cd enrichment,a pot experiment was conducted in green house in this study with the pepper(Capsicum annuum)cultivar'Chaotianjiao'as test crop and the moderate to mild Cd-contamina-ted soil as test soil.Six passivators including dolomite stone,dolomite powder,limestone stone,limestone powder,sesbania biochar and sepiolite were used to study the effects of using them alone and their combined application with green manure Vicia villosa on pH and available Cd content of soil,and Cd content and Cd bioenrichment in pepper.The results showed that compared with using passivator alone,the combined applica-tion of passivator after overturning of green manure had more significant effects on reducing the available Cd content in soil and the Cd content and bioenrichment in pepper.Among all the treatments,the application of sesbania biochar after overturning of green manure showed the most significant effects,and compared with the blank control,the soil available Cd content,pepper fruit Cd content and Cd bioenrichment coefficient de-creased by 43.50％,70.69％and 48.51％,respectively.But sesbania biochar was difficult to obtain.The effect of applying limestone powder combined with green manure were the second,and the above three indica-tors decreased by 29.56％,49.02％and 27.66％,respectively.Especially,the limestone powder was cheap and easy to obtain,so it could be widely popularized.Therefore,it was recommended to apply limestone pow-der after overturning of green fertilizer to reduce the soil available Cd in Cd polluted areas and ease the Cd en-richment in crop.
Keywords：Cd contaminated soilPassivatorOverturning of green manureCapsicum annuum var.Bioenrichment coefficient
Publication Date：2025-10-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 117-122 )