您的位置:首页  > 论文页面

青海与黑龙江冻土带土壤微生物量碳及其对环境条件的响应

发表时间:2013-11-15  浏览量:989  下载量:468
全部作者: 王尚,蒋宏忱,黄柳琴
作者单位: 中国地质大学(北京)生物地质与环境地质国家重点实验室;中国地质大学(北京)地球科学与资源学院
摘 要: 研究利用氯仿熏蒸-浸提法,定量分析了黑龙江高纬冻土带和青海高山冻土带土壤样品中的微生物量碳(microbial biomass carbon, Micro-C),并评价其与环境因子的相关性。研究结果显示:黑龙江高纬冻土的Micro-C和有机碳含量均高于青海高山冻土,但前者的微生物熵[Micro-C与总有机碳(total organic carbon, TOC)的比值]显著高于后者,表明青海冻土样品的土壤质量较好,可持续发展性强。相关性分析显示:黑龙江冻土Micro-C与TOC呈显著正相关,而与其他环境因子没有显著相关性,说明黑龙江冻土TOC含量改变会对Micro-C含量产生显著影响,且黑龙江冻土微生物丰度与年均降雨量呈正相关,说明水分是影响微生物生存的重要因素;而青海冻土Micro-C与环境因子没有显著相关性,表明该地区Micro-C含量的影响因素较为复杂,但该区微生物熵与土壤含水量和土壤pH值呈显著正相关,说明在该区土壤质量和微生物活性主要受含水量和pH值控制。
关 键 词: 生物地球化学;冻土;微生物量碳;环境条件
Title: Microbial biomass carbon and its response to environmental factors in the frozen soils of Qinghai province and Heilongjiang province
Author: WANG Shang, JIANG Hongchen, HUANG Liuqin
Organization: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing; School of Earth Science and Resources, China University of Geosciences, Beijing
Abstract: The microbial biomass carbon (Micro-C) was investigated in high-altitude frozen soils (Heilongjiang province of northeastern China) and high-elevation frozen soils (Qinghai province on the Qinghai-Tibet plateau) by using the fumigation-extraction method, and the correlation of them with environmental factors was evaluated. The results showed that the mean values of Micro-C and total organic carbon (TOC) of Heilongjiang soils were higher than that of Qinghai soils, whereas the ratios of Micro-C to TOC were higher in Qinghai soils, suggesting that the microbes might be more active in Qinghai soils. Correlation analysis showed that soil nutrients in Heilongjiang province and Qinghai province had different responses to environmental factors. In the studied Heilongjiang soils, Micro-C was significantly correlated to TOC, and total microbial abundance had significantly positive correlation to average annual precipitation. In the studied Qinghai soils, none of the measured environmental factors was significantly correlated to Micro-C, whereas the ratio of Micro-C to TOC was significantly correlated to soil water content and soil pH.
Key words: biogeochemistry; frozen soils; microbial biomass carbon; environmental factors
发表期数: 2013年11月第21期
引用格式: 王尚,蒋宏忱,黄柳琴. 青海与黑龙江冻土带土壤微生物量碳及其对环境条件的响应[J]. 中国科技论文在线精品论文,2013,6(21):2046-2054.
 
0 评论数 0
暂无评论
友情链接