关键词：
固沙群落;土壤微生物;功能多样性;Biolog;小叶锦鸡儿;科尔沁沙地
摘 要：
为探讨科尔沁沙地流动沙丘上建立小叶锦鸡儿固沙植被后土壤微生物群落代谢功能的变化,采用Biolog-ECO微平板检测法,研究了9、16和26年生人工群落以及流动沙丘和天然小叶锦鸡儿群落土壤微生物碳源代谢的多样性变化特征.结果表明:在培养的264h内,流动沙丘土壤微生物平均颜色变化率,以及对羧酸类、糖类、多聚物类、氨基酸类、胺类和芳香类化合物类的代谢能力明显高于人工群落;随着人工群落年龄的增加,土壤微生物代谢碳源种类增加,26年生人工群落土壤微生物的碳源代谢模式已接近天然群落.流动沙丘建立小叶锦鸡儿植被后,土壤微生物群落碳源代谢功能多样性和均匀度指数下降;随着植物群落发育年龄的增长,微生物功能多样性逐渐提高.
译 名：
Soil microbes functional diversity in sand-fixing Caragana microphylla communities in Horqin Sandy Land
作 者：
CAO Cheng-you, YAO Jin-dong, HAN Xiao-shu, ZHANG Ying (College of Sciences, Northeastern University, Shenyang 110004, China)
关键词：
sand-fixing plant community; soil microbe; functional diversity; Biolog; Caragana microphylla; Horqin Sandy Land
摘 要：
Aimed to understand the soil microbes functional diversity in sand-fixing Caragana microphylla communities in Horqin Sandy Land, the soil microbial carbon sources metabolism diversity in 9-, 16-, and 26-yr-old C. microphylla plantations, natural C. microphylla community, and moving sand dune was examined by the method of Biolog ECO-microplate culture. Within 264 h of culture, the average well color development (AWCD) and the capabilities of soil microbes in metabolizing carboxylic acids, carbohydrates, polymers, amino acids, amines, and aromatics were obviously higher in moving sand dune than in the plantations. The carbon source types metabolized by soil microbes increased with the increasing age of the plantations, and the carbon source metabolic pattern of the soil microbes in 26-yr-old C. microphylla plantation was similar to that in natural C. microphylla community. The functional diversity and evenness index of soil microbes decreased after the establishment of C. microphylla on moving sand dune, whereas the functional diversity of soil microbes increased with increasing age of C. microphylla plantation.
