干旱区典型盐生植物群落下土壤微生物群落特征

发布时间：2018-01-14 07:08

本文关键词：干旱区典型盐生植物群落下土壤微生物群落特征　出处：《生态学报》2016年08期 　论文类型：期刊论文

【摘要】：运用Biolog技术,对干旱区玛纳斯河流域扇缘带的6种典型盐生植物群落下土壤微生物群落特征差异性进行了研究,探讨不同植物群落对土壤微生物群落的影响。结果表明:不同盐生植物群落土壤平均颜色变化率(AWCD)随培养时间的延长而逐渐增加,大小顺序依次为:梭梭花花柴白刺绢蒿柽柳雾冰藜,且差异显著。不同植物群落土壤微生物对6类碳源利用差异显著(P0.05),其中梭梭群落利用率最高,雾冰藜群落利用率最低。碳水化合物类和氨基酸类是主要碳源,胺类的利用率最低。主成分分析(PCA)表明,在31种因子中提取的2个主成分因子,分别可以解释所有变量方差的41.51%和25.35%,对PC1和PC2起分异作用的主要碳源分别为碳水化合物类和氨基酸类。土壤微生物群落Shannon指数、Simpson指数上,除雾冰藜群落较低,其他群落之间均差异不显著(P0.05)。植物群落Margalef指数,Shannon指数和Simpson指数上,均为绢蒿,梭梭和柽柳群落较为优势。相关性分析表明,植物群落多样性指数与土壤微生物多样性指数呈显著正相关关系(P0.05),说明了植物多样性越丰富,土壤微生物越丰富。总体来说,干旱区不同盐生植物群落对土壤微生物群落多样性具有重要影响。其中,梭梭群落的土壤微生物群落具有较强的微生物总体活性和功能多样性。
[Abstract]:The differences of soil microbial communities in six typical halophytic communities in Manas River basin in arid area were studied by Biolog technique. The effects of different plant communities on soil microbial communities were studied. The results showed that the soil average color change rate (AWCDD) of different halophyte communities increased with the increase of culture time. The order of size and size was as follows: Amphorea ammodendron, Artemisia japonicus, Tamarix chinensis L., and the difference was significant. The soil microbes of different plant communities had significant differences in the utilization of 6 kinds of carbon sources (P0.05). Ammodendron ammodendron community utilization efficiency was the highest, Atriopodium ammodendron community was the lowest, carbohydrates and amino acids were the main carbon sources, and amines were the lowest. The principal component analysis (PCAA) showed that. The two principal component factors extracted from 31 factors can explain 41.51% and 25.35% of the variance of all variables, respectively. The main carbon sources for PC1 and PC2 differentiation were carbohydrates and amino acids respectively. The Shannon index of soil microbial community was lower than that of Chenopodium aeruginosa community. There was no significant difference among other communities (P 0.05). The Margalef index and Simpson index of plant community were both Artemisia annua. The correlation analysis showed that the plant community diversity index and soil microbial diversity index had a significant positive correlation (P0.05), which indicated that plant diversity was more abundant. In general, different halophytic plant communities have an important impact on the diversity of soil microbial communities. The soil microbial community of Haloxylon ammodendron community has strong total microbial activity and functional diversity.
【作者单位】：石河子大学;新疆兵团技术市场办公室;
【基金】：国家自然科学基金项目(31360320) 教育部科学技术研究项目(213039A) 兵团技术转移专项(2013BD051)
【分类号】：S154.3
【正文快照】： 土壤微生物是生态系统中重要的组成部分,而土壤微生物群落多样性作为描述其生态特征的关键指标,近来成为生态领域研究的热点问题。有研究指出,在荒漠生态系统中,植物群落类型对土壤微生物群落结构及功能多样性有着重要的影响[1]。同时,不同植物群落类型下土壤微生物群落结构和

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