盐生植被演替对土壤微生物碳源代谢活性的影响

发布时间：2018-05-27 13:22

本文选题：Biolog-Eco微平板法 + 碳源代谢多样性　；参考：《中国环境科学》2017年01期

【摘要】：采用Biolog-Eco微平板法,研究了黄河三角洲地区不同盐生植被下土壤微生物的碳源代谢特征,并探讨了土壤微生物碳源代谢水平与盐生植被演替的关系.结果表明,黄河三角洲土壤质量随盐生植被正向演替呈现逐渐改善的趋势,盐生植被从"裸地-强耐盐植物-轻耐盐性植物"演替过程中,土壤微生物碳源代谢活性极显著增强(P0.01).土壤微生物群落的Shannon-Wiener指数、丰富度、Simpson指数和Pielou均匀度指数按演替顺序逐渐增加,且与全氮、碱解氮呈现显著(P0.05)正相关,与土壤盐度呈现极显著负相关(P0.01).随着"光板地-强耐盐植物-轻度耐盐植物"的演替,微生物利用的碳源种类不断增加,所利用的各类碳源数量上也越来越接近.全氮(Total nitrogen)和碱解氮(Available nitrogen)显著促进了微生物的碳源代谢活性,土壤盐度则显著抑制了土壤微生物的碳源代谢活性.
[Abstract]:The characteristics of soil microbial carbon source metabolism under different halophytic vegetation in the Yellow River Delta region were studied by Biolog-Eco microplate method, and the relationship between soil microbial carbon source metabolism level and the succession of halophytic vegetation was discussed. The results showed that the soil quality of the Yellow River Delta was gradually improved with the forward succession of the halophytic vegetation, and the succession of the halophyte was from "bare land, strong salt tolerant plants to light salt tolerant plants". The metabolic activity of soil microbial carbon source was significantly increased (P 0.01). The Shannon-Wiener index, richness index and Pielou evenness index of soil microbial community increased gradually in succession order, and were positively correlated with total nitrogen, alkali-hydrolyzed nitrogen (P0.05), and negatively correlated with soil salinity (P0.01). With the succession of "light plate, strong salt tolerant plant and light salt tolerant plant", the kinds of carbon sources used by microorganisms are increasing, and the amount of various carbon sources used is more and more similar. Total nitrogenin and available nitrogenin significantly promoted the metabolic activity of microbial carbon source, while soil salinity significantly inhibited the metabolic activity of soil microbial carbon source.
【作者单位】：山东师范大学地理与环境学院;
【基金】：山东省自然科学基金资助项目(ZR2012DM013) 山东省高等学校科技计划项目(No.J15LE07)
【分类号】：S154.3;Q948.1

【相似文献】