Dynamics of bacterial communities in relation to soil aggregate formation during the decomposition of 13C-labelled rice straw
Dynamics of bacterial communities in relation to soil aggregate formation during the decomposition of 13C-labelled rice straw
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DOI：
10.1016/j.apsoil.2011.11.005
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发表时间：
2012-02-01
影响因子：
4.8
通讯作者：
Brauman, A.
中科院分区：
文献类型：
--
作者：
Blaud, A.;Lerch, T. Z.;Brauman, A.
已知添加新鲜有机物质可以改变微生物群落结构和土壤聚集。研究了秸秆分解过程中土壤微生物群落结构的动态变化及其与生境的关系。土壤样品，地面（2000亩）发生在2天内，在修正和未修正的样品，但这样做在更大程度上在修正的样品。C-秸秆主要分布在>200 μ m的组分中，降解菌最多。C-13-FAME剖面随时间和土壤组分内的总FAME剖面遵循相同的趋势，表明秸秆降解菌和总细菌群落之间的共同动态：革兰氏阴性菌在>200 μ m的组分中和培养早期阶段更重要，而革兰氏阳性菌和放线菌在细组分中和培养结束时占主导地位。细菌群落结构变化迅速（2天内），与新的微生物栖息地的形成相结合，表明两者之间的关系非常密切。(c)2011 Elsevier B. V.保留所有权利。
The addition of fresh organic matter is known to modify both microbial community structure and soil aggregation. The objective of this study was to understand the relationship between the dynamics of the soil microbial community structure in relation to that of their habitats during the decomposition of straw. Soil samples, ground (2000 mu m) occurred within 2 days in amended and unamended samples but did so to a greater extent in the amended samples. The C-Straw was mainly located in fractions >200 mu m, where degraders were the most abundant. The C-13-FAME profiles followed the same trends as total FAME profiles through time and within soil fractions, suggesting common dynamics between straw degraders and total bacterial communities: Gram-negative were more important in fraction >200 mu m and during the early stages of the incubation while Gram-positive and actinobacteria dominated in fine fractions and at the end of the incubation. Bacterial community structure changed rapidly (within 2 days) in conjunction with the formation of new microbial habitats, suggesting that the relationship between the two is very close. (c) 2011 Elsevier B.V. All rights reserved.