Grazing exclusion increases soil organic C through microbial necromass of root-derived C as traced by 13C labelling photosynthate

Qu, Qing; Deng, Lei; Gunina, Anna; Hai, Xuying; Deng, Jun; Shangguan, Zhouping; Kuzyakov, Yakov

doi:10.1007/s00374-024-01807-y

Cited by 3 publications

(1 citation statement)

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“…After cell death and subsequent lysis and fragmentation of soil microbes, some cell residues (microbial necromass) are persistently present and comprise slow-cycling carbon in grassland soil combined with refractory component of plant litter. Similarly, land use practices, such as converting cropland to grassland and sowing legumes (Jia et al, 2022 ), applying organic and inorganic fertilizers (Li et al, 2020 ), and grazing exclusion (Qu et al, 2024 ), demonstrate their positive impact on facilitating microbial turnover, formation, and persistence of microbial necromass. Consequently, these grassland land management interventions contribute to increased soil carbon sequestration.…”

Section: Resultsmentioning

confidence: 99%

Global hotspots and trends in microbial-mediated grassland carbon cycling: a bibliometric analysis

Xiang,

Yao,

Man

et al. 2024

Front. Microbiol.

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Grasslands are among the most widespread environments on Earth, yet we still have poor knowledge of their microbial-mediated carbon cycling in the context of human activity and climate change. We conducted a systematic bibliometric analysis of 1,660 literature focusing on microbial-mediated grassland carbon cycling in the Scopus database from 1990 to 2022. We observed a steep increase in the number of multidisciplinary and interdisciplinary studies since the 2000s, with focus areas on the top 10 subject categories, especially in Agricultural and Biological Sciences. Additionally, the USA, Australia, Germany, the United Kingdom, China, and Austria exhibited high levels of productivity. We revealed that the eight papers have been pivotal in shaping future research in this field, and the main research topics concentrate on microbial respiration, interaction relationships, microbial biomass carbon, methane oxidation, and high-throughput sequencing. We further highlight that the new research hotspots in microbial-mediated grassland carbon cycling are mainly focused on the keywords “carbon use efficiency,” “enzyme activity,” “microbial community,” and “high throughput sequencing.” Our bibliometric analysis in the past three decades has provided insights into a multidisciplinary and evolving field of microbial-mediated grassland carbon cycling, not merely summarizing the literature but also critically identifying research hotspots and trends, the intellectual base, and interconnections within the existing body of collective knowledge and signposting the path for future research directions.

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Section: Resultsmentioning

confidence: 99%