Metagenomic insights into the alteration of soil N‐cycling‐related microbiome and functions under long‐term conversion of cropland to Miscanthus

Autor: Chunqiao Zhao, Yuesen Yue, Qiang Guo, Juying Wu, Jinku Song, Qinghai Wang, Cui Li, Yang Hu, Sisi Wang, Ning Yuan, Zhengang Wang, Ranran Fan, Xincun Hou, Xifeng Fan
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: GCB Bioenergy, Vol 15, Iss 9, Pp 1105-1118 (2023)
Druh dokumentu: article
ISSN: 1757-1707
1757-1693
DOI: 10.1111/gcbb.13077
Popis: Abstract Miscanthus spp. show excellent application prospects due to its bioenergy potential and multiple ecological services. Annual N export with biomass harvest from Miscanthus, even without fertilizer supplement, do not reduce soil N levels. The question arises regarding how Miscanthus can maintain stable soil N levels. Metagenomic strategies were used to reveal soil N‐cycling‐related microbiome and their functional contributions to processes of soil N‐cycling based on the comparison among the bare land, cropland, 10‐year Miscanthus × giganteus, and 15‐year Miscanthus sacchariflorus fields. The results showed that, after long‐term cropland‐to‐Miscanthus conversion (LCMC), 16 of 21 bacterial phyla and all the archaeal phyla exhibited significant changes. Soil microbial denitrification and nitrification functions were significantly weakened, and N fixation (NF) was significantly enhanced. The biosynthesis of amino acids, especially alanine, aspartate, and glutamate metabolism, in soil N‐cycling‐related microbiome was dramatically promoted. The genus Anaeromyxobacter contributed largely to the NF process after LCMC. Variations in the soil available potassium, available N, organic C, and total N contents drove a functional shift of soil microbiome from cropland to Miscanthus pattern. We conclude that Miscanthus can recruit Anaeromyxobacter communities to enhance NF benefiting its biomass sustainability and soil N balance.
Databáze: Directory of Open Access Journals
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