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Biochar and organic fertilizer applications enhance soil functional microbial abundance and agroecosystem multifunctionality

文献类型： 外文期刊

作者： Hu, Wang 1 ; Zhang, Yuping 1 ; Rong, Xiangmin 1 ; Zhou, Xuan 3 ; Fei, Jiangchi 1 ; Peng, Jianwei 1 ; Luo, Gongwen 1 ;

作者机构： 1.Hunan Agr Univ, Coll Resources, Hunan Prov Key Lab Farmland Pollut Control & Agr R, Changsha 410128, Peoples R China

2.Natl Engn Lab Efficient Utilizat Soil & Fertilizer, Changsha 410128, Peoples R China

3.Hunan Acad Agr Sci, Inst Soil & Fertilizer, Changsha 410125, Peoples R China

关键词： Biochar; Organic fertilizer; Functional microbiome; Ecosystem functions; Multifunctionality

期刊名称：BIOCHAR （ 影响因子：12.7； 五年影响因子：13.1 ）

ISSN： 2524-7972

年卷期： 2024 年 6 卷 1 期

页码：

收录情况： SCI

摘要： Biochar and organic fertilizer are widely supported to maintain crop production and sustainable development of agroecosystems. However, it is unclear how biochar and organic fertilizer alone or in combination regulate soil functional microbiomes and their relationships to ecosystem multifunctionality (EMF). Herein, a long-term (started in 2013) field experiment, containing five fertilization treatments, was employed to explore the effects of biochar and organic fertilizer applications on the EMF (based on 18 functional indicators of crop productivity, soil nutrient supply, element cycling, and microbial biomass) and the functional microbiomes of bulk soil and rhizosphere soil [normalizing the abundances of 64 genes related to carbon (C), nitrogen (N), phosphorus (P), and sulphur (S) cycles]. Compared with single-chemical fertilization, biochar and organic fertilizer inputs significantly enhanced most ecosystem-single functions and, in particular, the EMF significantly increased by 18.7-30.1%; biochar and organic fertilizer applications significantly increased the abundances of soil microbial functional taxa related to C-N-P-S cycles to varying degree. The combined application of biochar and organic fertilizer showed a better improvement in these indicators compared to using them individually. Most functional microbial populations in the soil, especially the taxa involved in C degradation, nitrification, nitrate-reduction, organic P mineralization, and S cycling showed significantly positive associations with the EMF at different threshold levels, which ultimately was regulated by soil pH and nutrient availability. These results highlight the strong links between soil microbiomes and agroecosystem functions, as well as providing scientific support for inclusion of biochar in agricultural production and services with organic amendments. 8-year field evidence revealed impacts of biochar and pig manure on soil functional microbiome and ecosystem functions.Biochar and pig manure inputs notably enhanced most ecosystem-single functions and the EMF increased by 18.7-30.1%.Biochar and pig manure inputs notably enriched soil functional microbes related to C-N-P-S cycles to varying degree.Increase in EMF was related to microbe-driven soil processes such as C degradation, nitrification, and Po mineralization.Inclusion of biochar in crop production with organic amendments could enhance agro-ecosystem functions and services.

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