Metagenomic insights into the alteration of soil N-cycling-related microbiome and functions under long-term conversion of cropland to Miscanthus
文献类型： 外文期刊
作者： Zhao, Chunqiao 1 ; Yue, Yuesen 1 ; Guo, Qiang 1 ; Wu, Juying 1 ; Song, Jinku 2 ; Wang, Qinghai 1 ; Li, Cui 1 ; Hu, Yang 1 ; Wang, Sisi 1 ; Yuan, Ning 1 ; Wang, Zhengang 3 ; Fan, Ranran 1 ; Hou, Xincun 1 ; Fan, Xifeng 1 ;
作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, 9 Shuguanghuayuan Middle Rd, Beijing 100097, Peoples R China
2.Huailai Bur Agr & Rural Affairs, Zhangjiakou, Peoples R China
3.China Environm Protect Fdn, Beijing, Peoples R China
关键词： cropland; metagenomic analysis; N-cycling; N fixation; perennial energy crops; soil properties
期刊名称：GLOBAL CHANGE BIOLOGY BIOENERGY （ 影响因子：5.6； 五年影响因子：5.4 ）
ISSN： 1757-1693
年卷期： 2023 年
页码：
收录情况： SCI
摘要： 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 x 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.
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