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草地学报  2015 

黄土丘陵区不同植被类型根际微生物群落功能多样性研究

DOI: 10.11733/j.issn.1007-0435.2015.04.007, PP. 710-717

Keywords: 黄土丘陵区,植被类型,根际,微生物代谢功能群

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Abstract:

为了解生态恢复过程中土壤微生物功能特征,采用Biolog-Eco微平板法分析了黄土丘陵区人工灌木(柠条Caraganakorshinskii、沙棘Hippophaerrhamnoides)、人工草地(沙打旺Astragalusadsurgens、柳枝稷Panicumvirgatum)和天然草地(阿尔泰狗哇花Heteropappusaltaicus、茵陈蒿Artemisiacapillaries)的根际微生物碳源代谢多样性特征。结果表明柠条、阿尔泰狗哇花和茵陈蒿的根际微生物对糖类的代谢能力显著高于沙棘、沙打旺和柳枝稷;阿尔泰狗哇花和茵陈蒿对氨基酸类、酚酸类和聚合物类的代谢能力较高。茵陈蒿和阿尔泰狗哇花的微生物代谢功能多样性高于其他4种植物。柠条、阿尔泰狗哇花和茵陈蒿具有相似的根际微生物代谢功能。黄土丘陵区植被类型显著影响微生物群落碳源利用能力,天然草地根际微生物群落代谢功能多样性优于人工灌木和人工草地。

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