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首页> 外文会议>World Congress of Soil Science >Shrub-interspace dynamics of soil microbial communities under different patch areas in a semiarid river valley, SW China
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Shrub-interspace dynamics of soil microbial communities under different patch areas in a semiarid river valley, SW China

机译：SEMIARID RIVER Valley，SW中国不同贴片区域土壤微生物群落的灌木间隙动态

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摘要

In arid and semi-arid ecosystems, belowground characteristics are influenced by the formation and persistence of "fertile islands" in contrast to barren plant interspaces. We investigated the soil properties of patched vegetation, especially the belowground properties of microbial communities, by directly comparison of soil microbial communities between soils under patched vegetation and in the interplant spaces with increased patch areas in Minjiang River arid valley. We found "fertile islands" exist in patch soils, and the increased substrates utilization ability of soil microbes may indicate a positive feedback to maintain the "fertile islands" under patched vegetation. Under the patches, soil C, soil N, soil microbial biomass, soil water content, clay concentration were significantly improved by the increasing vegetation patch areas. The fungus to bacteria ratio was increasing with the enlarged vegetation and the contribution of fungi to microbe was closely relevant to patch area. Compared thebarren plant interspaces, soil nutrient condition and microbial biomass were significantly influenced by its adjacent patch. Thus, "the islands of fertility" may be beneficial and advance the rehabilitation of plant in this semi-arid region.
机译：在干旱和半干旱生态系统中，地下特征受到“肥沃岛屿”的形成与持久性，与贫瘠的植物间隙相比。我们调查了修补植被的土壤性质，尤其是微生物社区的地下地下的地下特征，直接比较土壤微生物在植物下的土壤中的土壤微生物社区以及岷江干旱谷的增加的贴片区域。我们发现“肥沃的岛屿”存在于斑块土壤中，并且土壤微生物的利用率增加的利用能力可能表明在修补植被下维持“肥沃岛屿”的正反馈。在植被贴片区域增加，土壤C，土壤N，土壤微生物生物量，土壤含水含量，粘土浓度显着改善。细菌率的真菌随着植被的扩大和微生物的贡献与微生物的贡献与贴片区域密切相关。比较了巴伦植物间隙，土壤养分病症和微生物生物量受其相邻贴剂的显着影响。因此，“生育群岛”可能是有益的，并提高该半干旱地区植物的康复。

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