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首页> 美国卫生研究院文献>other >Nitrosospira sp. Govern Nitrous Oxide Emissions in a Tropical Soil Amended With Residues of Bioenergy Crop
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Nitrosospira sp. Govern Nitrous Oxide Emissions in a Tropical Soil Amended With Residues of Bioenergy Crop

机译：亚硝基螺菌在修正了生物能源作物残留的热带土壤中治理一氧化二氮排放

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Organic vinasse, a residue produced during bioethanol production, increases nitrous oxide (N2O) emissions when applied with inorganic nitrogen (N) fertilizer in soil. The present study investigated the role of the ammonia-oxidizing bacteria (AOB) community on the N2O emissions in soils amended with organic vinasse (CV: concentrated and V: non-concentrated) plus inorganic N fertilizer. Soil samples and N2O emissions were evaluated at 11, 19, and 45 days after fertilizer application, and the bacterial and archaea gene (amoA) encoding the ammonia monooxygenase enzyme, bacterial denitrifier (nirK, nirS, and nosZ) genes and total bacteria were quantified by real time PCR. We also employed a deep amoA amplicon sequencing approach to evaluate the effect of treatment on the community structure and diversity of the soil AOB community. Both vinasse types applied with inorganic N application increased the total N2O emissions and the abundance of AOB. Nitrosospira sp. was the dominant AOB in the soil and was correlated with N2O emissions. However, the diversity and the community structure of AOB did not change with vinasse and inorganic N fertilizer amendment. The results highlight the importance of residues and fertilizer management in sustainable agriculture and can be used as a reference and an input tool to determine good management practices for organic fertilization.
机译：有机酒糟是生物乙醇生产过程中产生的残留物，当与土壤中的无机氮（N）肥料一起施用时，会增加一氧化二氮（N2O）的排放。本研究调查了氨氧化细菌（AOB）群落对土壤中N2O排放的作用，该土壤中添加了有机酒糟（CV：浓缩和V：未浓缩）以及无机氮肥。施肥后第11、19和45天评估土壤样品和N2O排放，并对编码氨单加氧酶，细菌反硝化剂（nirK，nirS和nosZ）基因和总细菌的细菌和古细菌基因（amoA）进行定量。通过实时PCR。我们还采用了深度amoA扩增子测序方法来评估处理对土壤AOB群落的群落结构和多样性的影响。两种酒糟类型与无机氮的施用均增加了N2O的总排放量和AOB的含量。亚硝基螺菌是土壤中主要的AOB，并且与N2O排放相关。然而，随着酒糟和无机氮肥的改良，AOB的多样性和群落结构没有改变。结果突出了残留物和肥料管理在可持续农业中的重要性，可以用作确定有机肥料良好管理规范的参考和输入工具。

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