摘要
分别以乌鲁木齐河源区不同层位深坑冻土样品为研究材料,利用荧光显微计数技术、寡营养恢复培养技术等研究了微生物数量特征及其与土壤理化参数的关联度.结果表明:可培养细菌数量与冻土深度、土壤含水量、总C和总N含量都成显著的正相关,与pH值呈显著负相关.而且,可培养细菌数及其在细胞总数中所占比值随冻土深度的增加而下降,表明深坑样冻土中可培养细菌数量与冻土的理化性质和其沉积年代密切相关.
The microorganisms in permafrost could live in cold environment through the coadapted physicochemical process,which exists between microorganisms in permafrost and permafrost environment.In this paper,the relation between microbial number and soil physicochemical properties of permafrost at different depths at the headwaters of the ürümqi River is analyzed by using fluorescence microscopy counting and oligo-culture techniques.Totally,20 samples from a 200-cm permafrost core were used as study materials.It is found that the number of cultivable bacteria has a significant positive correlation with soil water content,total carbon and total nitrogen concentrations,and a significant negative correlation with pH value.Meanwhile,the ratio of cultivable bacteria to total cell number decreases with depth.The results demonstrate that the number of cultivable bacteria in permafrost is closely correlated with soil physicochemical properties and depositional age.
出处
《冰川冻土》
CSCD
北大核心
2011年第2期436-441,共6页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(307703293080015440971034)
中国博士后科学基金项目(20080430794)资助
关键词
冻土微生物
可培养细菌
理化性质
相关性
microorganisms in permafrost
cultivable bacteria
physicochemical properties
correlation
