中国烟草学报2018，Vol.24Issue(3)：46-52,7.DOI:10.16472/j.chinatobacco.2017.291
生物炭对土地整治区土壤微生物调控效应
Control effect of biochar on soil microorganism in land consolidation region
摘要
Abstract
[Objective] In order to improve soil fertility of land consolidation region,a long term field experiment was designed to study the control effect of biochar on soil microorganism in land consolidation region.[Methods] This experiment consisting of 5 treatments,i.e.treatment without biochar addition named as CK(0 t/hm2)and treatments with 4 different levels(7.5,15,30 and 45 t/hm2)of biochar addition,was performed to study the effect of biochar addition on the soil microbiology index.[Results](1)When application rate of biochar was above 7.5 t/hm2,soil microbial biomass C/N ratio and microbial quotient were significantly decreased by 70.22％and 81.11％,respectively.(2)The biodiversity of soil microorganism could be increased by moderate application of biochar; the OTUs peaks of bacteria and fungi were reached when the biochar application rate were 20-30 t/hm2and 10-30 t/hm2,respectively.However,the OTUs would be decreased when the biochar application was more than 30 t/hm2.(3)With the increase of biochar application rate,the relative abundance of Proteobacteria was decreased and the relative abundance of Actinobacteria increased,while the relative abundance of Ascomycota was increased at first and then decreased.(4)The application of biochar reduced the relative abundance of nitrifying bacteria and denitrifying bacteria,while increased the relative abundance of azotobacter.Therefore,biochar was beneficial to soil nitrogen immobilization.(5)A moderate application of biochar reduced the relative abundance of possible pathogenic bacteria,whereas a high dosage of biochar would raise disease risk in tobacco production.[Conclusion] A moderate application of biochar could improve soil microbial characteristics in land consolidation region.The optimal application rate was about 15 t/hm2.关键词
土地整治/生物炭/土壤微生物/土壤改良Key words
land consolidation/biochar/soil microorganism/soil betterment引用本文复制引用
邓建强,谭军,施河丽,樊俊,向必坤,王瑞..生物炭对土地整治区土壤微生物调控效应[J].中国烟草学报,2018,24(3):46-52,7.基金项目
中国烟草总公司科技重点项目"基于宏基因学的植烟土壤健康评价研究与应用"(No.110201402016) （No.110201402016）
湖北省青年托举人才项目 "植烟土壤氮库组分研究及提升烟叶质量的氮素调控技术"(NO.027Y2018-026) （NO.027Y2018-026）
