不同生物质炭对土壤有机碳矿化及其活性碳的影响  

Impacts of Biochars on Soil Organic Carbon Mineralization and Labile Carbon

作　　者：刘岩[1] 尹云锋[1,2] 陈智伟[1] 尹艳[1] 马红亮[1,2] 高人[1,2] 

机构地区：[1]福建师范大学地理科学学院,福州350007 [2]福建省湿润亚热带山地生态重点实验室-省部共建国家重点实验室培育基地,福州350007

出　　处：《亚热带资源与环境学报》2016年第4期9-14,36,共7页Journal of Subtropical Resources and Environment

基　　金：教育部科学技术研究项目(213019A);国家自然科学基金项目(31470628;31070549)共同资助

摘　　要：通过室内培养实验,研究了2种木本材料（木荷和杉木）在3种热解温度下（350℃、550℃、750℃）制备的生物质炭对土壤有机碳矿化和微生物生物量碳（microbial biomass carbon,MBC）以及可溶性有机碳（dissolved organic carbon,DOC）的影响。结果表明：2种材料在不同热解温度下制备的生物质炭均显著增加了土壤CO_2-C累积释放量,并且添加木荷生物质炭处理的土壤CO_2-C累积释放量为添加杉木生物质炭处理的1.02-1.13倍。同一材料不同热解温度的生物质炭对土壤CO_2-C累积释放量的影响同样存在显著差异,且热解温度越低,累积释放量越高。此外,与对照土壤相比,生物质炭的加入显著降低了土壤MBC含量,但不同生物质炭处理之间土壤MBC的差异并不显著。相同热解温度条件下,添加木荷生物质炭的土壤DOC含量显著高于杉木生物质炭的;而同种材料条件下,不同热解温度制备的生物质炭对土壤DOC含量的影响则呈现热解温度越高土壤DOC含量越低的变化趋势。An incubation experiment was carried out to investigate the influences of different biochar ad- ditions on the mineralization of soil organic carbon and soil labile carbon （microbial biomass carbon, MBC; dissolved organic carbon, DOC ）. Biochars were produced from Schima superba and Cunning- hamia lancedata litter at 350 ℃, 550 ℃ and 750 ℃. The results showed that biochar additions signifi- cantly increased the cumulative amount of CO2-C compared to the control soil, and the cumulative a- mount of CO2-C in Schima superba biochar treatments was 1.02 - 1.13 times greater than that in the Cunninghamia lancedata biochar treatments. For the same material with different pyrolysis temperature, the cumulative amount of CO2-C was significantly different and higher cumulative amount of CO2-C generally occmTed at lower pyrolysis temperature. In addition, biochar additions significantly decrease the content of soil MBC compared to the control soil, but there was no significant difference among all different biocha treatments. The content of soil DOC with Schima superba biochars addition was signifi-cantly higher than that in Cunninghamia lancedata biochar treatments under the same pyrolysis tempera- ture, while the content of DOC decreased with pyrolysis temperature increase under the same material.

关 键 词：生物质炭 土壤有机碳 矿化 水溶性有机碳 微生物生物量碳 

分 类 号：S154[农业科学—土壤学]