茶渣生物质炭对茶园土壤有机碳及其活性组分的影响  

Effect of Tea Residue Biochar on Soil Organic Carbon and Its Active Components in Tea Garden Soil

作　　者：肖欣娟 夏建国 马黛玉 于正义 周玥希 XIAO Xinjuan;XIA Jianguo;MA Daiyu;YU Zhengyi;ZHOU Yuexi(College of Resources,Sichuan Agricultural University,Chengdu 611130)

机构地区：[1]四川农业大学资源学院,成都611130

出　　处：《水土保持学报》2020年第6期294-300,共7页Journal of Soil and Water Conservation

基　　金：四川农业大学学校建设双支计划项目(2019)。

摘　　要：为探究生物质炭对茶园土壤有机碳含量及其稳定性的影响,将茶渣在500℃下制成生物质炭,针对雅安名山区3种典型茶园土壤(紫色土、水稻土和黄壤)进行112天的室内培养试验,包括CK,0.5%,1%,2%和4%5种炭土比,共计15个处理,在培养的第1,2,7,30,60,112天取样测定。结果表明:茶渣生物质炭输入能显著增加紫色土、水稻土和黄壤总有机碳(TOC)含量和稳定性,且随添加比例的增加而增加,培养结束时3种土壤TOC的增幅范围依次为15.97%~96.64%,13.01%~72.36%和15.29%~321.43%,其中对黄壤TOC含量的提升作用最大;生物质炭加入后3种茶园土壤的微生物量碳(MBC)、水溶性有机碳(WSOC)和易氧化有机碳(ROC)含量也得到显著提升,到培养结束时3种土壤MBC含量变化最大的是紫色土,增幅范围为12.97%~40.35%,WSOC和ROC含量变化最大的均为黄壤,增幅范围分别为12.50%~50.00%和5.66%~54.72%;茶渣生物质炭显著提升了3种土壤有机碳的氧化稳定性,且随添加比例的增加而增强,紫色土、水稻土和黄壤的氧化稳定系数提升范围分别为28.07%~146.66%,44.79%~225.66%和447.18%~1941.19%。In order to investigate the impact of biochar on the tea garden soil organic carbon,tea residue was made into biochar at 500℃.In this study,a 112-day incubation experiment was conducted to study the impact of biochar input on soil organic carbon contents and stability in three typical tea garden soils(purple soil,paddy soil,and yellow soil)of Ya’an.The study included five kinds of carbon soil ratio(CK,0.5%,1%,2%and 4%),fifteen treatments in total,and samples were taken at 1,2,7,30,60,and 112 days of culture.Research showed that:tea residue biochar input can significantly increase the content and stability of total organic carbon(TOC)in purple soil,paddy soil,and yellow soil,and increases with the addition ratio,at the end of the cultivation period,the increasing ranges of total soil organic carbon in the three soils were 15.97%~96.64%,13.01%~72.36%,and 15.29%~321.43%,respectively.Among them,the effect of increasing the TOC content of yellow soil was the best.After the addition of biochar,the contents of microbial biomass carbon(MBC),water-soluble organic carbon(WSOC),and readily oxidized organic carbon(ROC)in the three tea garden soils had also been significantly increased.By the end of the cultivation period,the largest change in MBC content in the three soils was purple soil,with an increase range of 12.97%~40.35%,and the largest changes in WSOC and ROC contents were in yellow soil,with increases ranging from 12.50%to 50.00%and 5.66%to 54.72%,respectively.Tea residue biochar significantly improved the oxidation stability of three types of soil organic carbon,and increased with the addition ratio.The improvement range of oxidation stability coefficient was 28.07%~146.66%,44.79%~225.66%and 447.18%~1941.19%,respectively.

关 键 词：茶渣生物质炭 茶园土壤 有机碳 活性有机碳 有机碳稳定性 

分 类 号：S152.4[农业科学—土壤学] S156.2[农业科学—农业基础科学]