Sugarcane bagasse amendment improves the quality of green waste vermicompost and the growth of Eisenia fetida  

作　　者：Linlin Cai Xiangyang Sun Dan Hao Suyan Li Xiaoqiang Gong Hao Ding Kefei Yu 

机构地区：[1]College of Forestry,Beijing Forestry University,Beijing 100083,China

出　　处：《Frontiers of Environmental Science & Engineering》2020年第4期65-75,共11页环境科学与工程前沿（英文）

基　　金：This work was funded by the National Forestry Public Welfare Project of China(Grant No.201504205).

摘　　要：Vermicomposting is a feasible method for disposing of lignocellulosic waste while generating a useful product.The current study assessed the potential of vermicomposting green waste mixed with sugarcane bagasse in proportions of 25%,50%,and 75%(v:v,based on dry weight).The suitability was evaluated based on the agrochemical properties,earthworm biomass,and phytotoxicity.The final vermicomposts exhibited near-neutral pH values(7.1-7.6),and lower EC values(0.43-0.72 mS/cm)and C:N ratios(14.1-19.9).The content of available nutrients and CEC for all the vermicomposts exceeded those of the control compost(without earthworms).For vermicomposts,the average values of NO3-N,AP,AK,and CEC were 53,517,1362 mg/kg,and 158 cmol/kg,respectively.The total contents of heavy metals increased in all vermicompost treatments compared to control composts with the following average final percentages:Zn(2.0%),Cr(15.5%),Pb(23.4%),and Cu(44.3%),but these amounts were safe for application in agroforestry.The addition of sugarcane bagasse to green waste significantly increased the content of total humic substance,humic acid and urease activity,acid and alkaline phosphatase activity,and Eisenia fetida reproduction.The addition of 25%sugarcane bagasse to green waste decreased the toxicity to germinating seeds.These results revealed that vermicomposting is a feasible way to degrade green waste into a value-added chemical product.

关 键 词：Green waste Earthworms Sugarcane bagasse VERMICOMPOSTING Nutrient recovery 

分 类 号：X783.5[环境科学与工程—环境工程] S14[农业科学—肥料学]