秦岭地区不同林分土壤微生物群落代谢特征  

The metabolism characteristics of microbial community in different forest soil in Qinling Mountains Area

作　　者：曹永昌[1] 谭向平[1] 和文祥[1] 耿增超[1] 刘帅[1] 佘雕[2] 侯林[3] 

机构地区：[1]西北农林科技大学资源环境学院,农业部西北植物营养与农业环境重点实验室,杨凌712100 [2]西北农林科技大学水土保持研究所,杨凌712100 [3]西北农林科技大学林学院,杨凌712100

出　　处：《生态学报》2016年第10期2978-2986,共9页Acta Ecologica Sinica

基　　金：国家林业公益性行业科研专项(201304307);西北农林科技大学“基本科研业务费科研创新重点项目”(ZD2013012)

摘　　要：利用BIOLOG微孔板法研究了秦岭山脉的锐齿栎(Quercus aliena var.acutidentata)、油松(Pinus tabuliformis)、华山松(Pinus armandii)、松栎混交、云杉(Picea asperata)6个林地5种典型林分土壤微生物群落代谢特征。发现:(1)5种典型林分中,华山松的平均颜色变化率(AWCD)最高,然后是锐齿栎1>云杉>油松>锐齿栎2>松栎混交。位于不同林场的锐齿栎林地土壤AWCD值差异较大;(2)土壤微生物功能多样性指数与平均颜色变化率表现一致,6种林分之间差异显著,且不同的林分土壤微生物对6种碳源利用差异较大。(3)主成分分析显示各土壤微生物功能多样性具有显著差异,其综合因子得分为华山松>锐齿栎1>油松>云杉>锐齿栎2>松栎混交。(4)冗余分析表明土壤p H、有机质、全氮、碱解氮、速效磷和速效钾的综合作用对土壤微生物群落功能多样性有显著影响,其中速效磷和p H与土壤微生物功能多样性最密切。In this study, the BIOLOG microporosity plate technology was employed to investigate the metabolic characteristics of microbial community in six woodlands with five typical types of forest soils,which included forest soils planted with tooth Oak（ Quercus aliena var. acutidentata）,chinese pine（ Pinus tabuliformis）,armand pine（ Pinus armandii）,pine and oak mixed,spruce（ Picea asperata）. The major findings include：（ 1） The average well color development（ AWCD） of armand pine is the highest among the five kinds of typical forests,followed by tooth Oak1 spruce chinese pine tooth Oak2pine and oak mixed,The AWCD value of tooth Oak woodlands located in different forest farms showed large differences among each other;（ 2） The index of soil microbial function diversity is consistent with the AWCD.The differences among six forest lands showed significant difference,. Significant difference was also observed for the utilization of six carbon source by soil microorganism in different forest components.（ 3） The principal component analysis showed that the soil microbial functional diversity among different soils were significant different. The sequence of comprehensive factor scores were armand pine 〉tooth Oak1 〉Chinese pine 〉chinese spruce 〉tooth Oak2〉 pine and oak mixed.（ 4） Redundancy analysis shows that the comprehensive effect of soil p H,organic matter,total nitrogen,alkali hydrolyzable nitrogen,the available phosphorus and available potassium can significantly affect soil microbial communityfunctional diversity,especially the available P and p H which were closely related to soil microbial functional diversity.

关 键 词：秦岭 土壤微生物 代谢特征 BIOLOG 

分 类 号：S714.3[农业科学—林学]