摘要
以垂直青藏公路不同距离样带土壤为研究样本，研究了距青藏公路10～500m范围内土壤细菌丰度的变化及其影响因素．结果表明：青藏公路沿线土壤细菌丰度为2．71×10^7～7．20×10^8copies·g^-1dw；距公路10～500m土壤细菌丰度呈现出递增趋势，且以50m为界限，50～500m细菌丰度没有显著差异．土壤细菌丰度与环境因子的相关性表明：青藏公路沿线土壤细菌丰度主要受土壤总氮、总有机碳以和植被盖度的影响，表现为细菌丰度与土壤总氮极显著正相关，与总有机碳显著正相关，与植被盖度极显著正相关．上述结果说明，青藏公路对土壤细菌丰度的影响范围在50m左右．
In this study, the change trends of bacterial abundances and the affecting factors in soils of various belts （ranging from 10 m to 500 m） parallel to the Qinghai-Tibet Highway were investigated. Along the high- way, the abundances of bacteria in the soils range from 2.71 ×107 copies · g^-1dw to 7.20 × 108 copies · g^-1dw. Perpendicular to the highway, the abundances of bacteria in the soils increase from 10 m to 500 m and then turn to stationary, with a significant boundary at the distance of 50 m. Correlation analyses between the environmental factors and the abundances of bacteria in the soils indicate that the soil bacterial abundance have significant posi- tive correlation with the total nitrogen, the total organic carbon and the vegetation coverage. The study results in- dicate that the distance of the Qinghai-Tibet Highway influencing the soil bacterial abundance is approximately 50 m.
出处
《冰川冻土》
CSCD
北大核心
2014年第1期207-213,共7页
Journal of Glaciology and Geocryology
基金
国家自然科学基础人才培养基金冰川学冻土学特殊学科点项目(J1210003/J0109)
国家重点基础研究发展计划(973计划)项目(2012CB026105)
国家自然科学基金项目(41271265)资助
关键词
青藏公路
土壤细菌丰度
土壤理化性质
环境因子
Qinghai-Tibet Highway
soil bacterial abundance
soil physicochemical properties
environmentalfactors
