CAJ | 학술논문

巨桉人工林生态系统根际与根外可培养土壤微生物数量季节变化研究表明,根际与根外细菌和放线菌季节变化规律基本一致,都表现为秋季显著高于冬季,而真菌数量季节之间差异不显著;巨桉人工林土壤微生物具有明显的根际效应（R/S值为1.40）,各季节根际土壤细菌、真菌和放线菌的数量显著高于根外;巨桉人工林根际土壤好气性细菌、真菌数量显著高于毗邻青冈次生林,根际土壤有效养分指标大多显著或极显著高于青冈次生林;根际土壤微生物与根际土壤养分之间存在密切的关系,根际土壤有机质、水解N、速效P与根际土壤微生物数量都呈极显著正相关。
거안인공림생태계통근제여근외가배양토양미생물수량계절변화연구표명,근제여근외세균화방선균계절변화규률기본일치,도표현위추계현저고우동계,이진균수량계절지간차이불현저;거안인공림토양미생물구유명현적근제효응（R/S치위1.40）,각계절근제토양세균、진균화방선균적수량현저고우근외;거안인공림근제토양호기성세균、진균수량현저고우비린청강차생림,근제토양유효양분지표대다현저혹겁현저고우청강차생림;근제토양미생물여근제토양양분지간존재밀절적관계,근제토양유궤질、수해N、속효P여근제토양미생물수량도정겁현저정상관。
Researches were conducted on seasonal dynamics of rhizosphere and non-rhizosphere culturable soil microorganism quantity in Eucalyptus grandis plantation ecosystem.The result showed that the seasonal dynamics of rhizosphere and non-rhizosphere soil bacteria and actinomyces was generally consistent,which in autumn was significantly higher than in winter,while the fungus quantity was no significant difference between seasons.Soil microorganism in Eucalyptus grandis plantation had an obvious rhizosphere effect(R/S value of 1.40),rhizospheric soil bacteria,fungi and actinomyces quantity were significantly higher than the non-rhizospheric in each season.Rhizosphere aerobic bacteria and fungi quantity of Eucalyptus grandis were significantly higher,rhizosphere soil nutrient index was also mostly better than secondary Cyclobalanopsis glauca forest,and many nutrient indicators reached significant difference.There was a close relationship between rhizosphere microorganisms and rhizosphere soil nutrients,and rhizospheric soil organic matter,hydrolysis N,available P and rhizosphere soil microorganism quantity had a very significant positive correlation.