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巨桉人工林根际可培养土壤微生物数量的季节变化
引用本文:崔炳华,蒋勇,陈绍武,晋明瑞,胡开波,王守强.巨桉人工林根际可培养土壤微生物数量的季节变化[J].四川林业科技,2012,33(5):63-66.
作者姓名:崔炳华  蒋勇  陈绍武  晋明瑞  胡开波  王守强
作者单位:1. 重庆市万州区林业局,重庆万州,404000
2. 四川省林业调查规划院,四川成都,610081
摘    要: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。

关 键 词:巨桉人工林  根际土壤  可培养微生物数量

Seasonal Variation of Rhizosphere Culturable Soil Microorganism Quantity in Eucalyptus grandis Plantation Ecosystem
CUI Bing-hua,JIANG Yong,CHEN Shao-wu,JIN Ming-rui,HU Kai-bo,WANG Shou-qiang.Seasonal Variation of Rhizosphere Culturable Soil Microorganism Quantity in Eucalyptus grandis Plantation Ecosystem[J].Journal of Sichuan Forestry Science and Technology,2012,33(5):63-66.
Authors:CUI Bing-hua  JIANG Yong  CHEN Shao-wu  JIN Ming-rui  HU Kai-bo  WANG Shou-qiang
Institution:1.Wanzhou District Forestry Bureau of Chongqing,Wanzhou 404000; 2.Sichuan Forest Inventory and Plan Institute,Chengdu 610081)
Abstract: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.
Keywords:Eucalyptus grandis plantation  rhizosphere soil  culturable microorganism quantity
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