杨桃根际土壤理化性质及微生物群落特征分析  

Physical/Chemical Properties and Microbial Communities in Rhizospheric Soil of Averrhoa carambola Linn.

作　　者：阮传清[1] 陈建利[1] 刘波[1] 苏明星[1] 余智城[2] 

机构地区：[1]福建省农业科学院农业生物资源研究所,福建福州350003 [2]福建省热带作物科学研究所,福建漳州363000

出　　处：《福建农业学报》2013年第8期789-795,共7页Fujian Journal of Agricultural Sciences

基　　金：国家公益性行业(农业)科研专项(200903034)

摘　　要：采用平板培养和磷脂脂肪酸（PLFAs）分析方法，研究20年树龄的台湾软枝杨桃根际与非根际土壤微生物群落差异，及其与土壤理化性质的相关性。结果表明，杨桃根际土壤可培养真菌、放线菌、放线菌特征脂肪酸10Me17∶0含量较同层次的非根际土壤多，土壤上层的可培养微生物及微生物特征脂肪酸16∶0（细菌）、18∶1ω9c （真菌）和10Me17∶0（放线菌）均比下层土壤的含量高。微生物 PLFAs 与土壤有机质含量呈显著或极显著相关的有23种，包括16∶0、18∶1ω9c 和10Me17∶0；与土壤总氮、总磷、总钾相关的有18～20种；与pH 值和含水量相关的 PLFAs 种类较少。Microbial communities in the soil of the rhizosphere and non-rhizosphere of Averrhoa carambola Linn cv . Taiwan soft-branch carambola were compared by microorganism-culturing and the application of the phospholipids fatty acids biomarkers （PLFAs） .Correlation and soil chemistry were also studied . Significantly more cultural fungi and actinomycetes as well as PLFA 10Me17 ∶ 0 related to actinomycetes were found in the rhizospheric than in the non-rhizosphere soil of a same layer . The quantities of PLFAs 16 ∶ 0 related to bacteria ,18 ∶ 1ω9c related to fungi and 10Me17 ∶ 0 related to actinomycetes were significantly higher in the upper- than in deep-layer of the soil . The quantities of organic matters significantly correlated with the 23 PLFAs biomarkers ,including 16 ∶ 0 ,18 ∶ 1ω9c and 10Me17 ∶ 0. Total nitrogen ,potassium and phosphorus significantly correlated with the 18 - 20 PLFAs biomarkers . Only a few PLFAs biomarkers showed significant correlation to the soil pH or water content of the soils .

关 键 词：台湾软枝杨桃 土壤微生物 磷脂脂肪酸分析(PLFAs) 

分 类 号：S667.9[农业科学—果树学] S667.1[农业科学—园艺学]