EFFECT OF CARBON AVAILABILITY ONMICROBIAL ACTIVITIES IN Calamagrostis angustifolia SOIL

编号 zgly0000333353

文献类型 期刊论文

文献题名 EFFECT OF CARBON AVAILABILITY ONMICROBIAL ACTIVITIES IN Calamagrostis angustifolia SOIL

作者 XUXiao-Feng  SONGChang-Chun  SONGXia  YANGHuai-Hui 

作者单位 NortheastInstituteofGeographyandAgriculturalEcology 

母体文献 湿地科学 

年卷期 2004,2(1)

页码 68-73

年份 2004 

分类号 X171.1 

关键词 碳  微生物  三江平原  土壤  湿地系统  生态环境 

文摘内容 Carbon availability varies very much along soil profile and decreases from topsoil to subsoil. The effect of carbon availability index (CAI) on microbial activities in Calamagrostis angustifolia soil in the Sanjiang Plain in the Northeast China was measured. Based on the proposal about CAI and microbial respiration from Parkinson and Coleman (1999), the results showed that carbon availability limits the microbial activities in topsoil, root layer soil and subsoil initially, wbercas it does not limit the microbial activity after 1.5 h incubation for recovery from the disturbance inphysical, chemical and biology structure resulting from sampling, then after 5h incubation carbon availability limits mierobial activity again after the labile carbon was mineralized. At the same time the soil organic matter affects the carbon availability significantly when it is lower than 10%, but little when the soil organic matter is higher than 10%. The microbial biomass carbon is linearly related to carbon availability in the Calamagrostis angustifolia soil. When the CAI is lower than 0.85, the β-glucosidase activity increases along with CAI, but decreases when CAI is larger than 0.85。