Fungal necromass contribution to carbon sequestration in global croplands: A meta-analysis of driving factors and conservation practices

doi:10.1016/j.scitotenv.2024.174954

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	Fungal necromass contribution to carbon sequestration in global croplands: A meta-analysis of driving factors and conservation practices
	Liu, Dong; Zhou, Ziyan; Iqbal, Shahid; Dou, Ting Ting; Bonito, Gregory; Liu, Wei; An, Shaoshan; Chater, Caspar C. C.; Perez-Moreno, Jesus; Che, Rongxiao; Jones, Davey L.; Yu, Fuqiang
	2024
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	949 页码:174954
摘要	Fungal necromass carbon (FNC) contributes significantly to the build-up of soil organic carbon (SOC) by supplying abundant recalcitrant polymeric melanin present in the fungal cell wall. However, the influence of a wide range of conservation practices and associated factors on FNC accumulation and contribution to SOC in global croplands remains unexplored. Here, a meta-analysis was performed using 873 observations across three continents, together with structural equation modeling, to evaluate conservation practices and factors responsible for the enhancement of FNC and SOC. FNC content (8.39 g kg- 1 ) of North American soils was highest compared to FNC content of Asian and European soils. The structural equation models showed a significant (p p < 0.05) positive influence of microbial biomass carbon (MBC), soil pH, and clay contents on the accumulation of FNC. Soil C/N ratio and climate factors, however, had only minor influences on FNC accumulation. Notably, the main driver of FNC was MBC, which is mainly influenced by the soil total N and geographic factors in the study areas. Typical 5 cropland practices had significant effect size (p p < 0.05) on FNC, leading to an increase of 12 % to 26 %, and the FNC content was greatest under straw amendment (26 %). Fungal necromass accumulation efficiency ranged from 23 % to 45 % depending on cropland practices: non- and reduced tillage was the most efficient (45 %), followed by crop coverage (32 %), straw amendment (30 %), and manure application (27 %), while N fertilization had the lowest efficiency (23 %). We conclude that FNC contributes to over a quarter of SOC, highlighting its major role in enhancing C sequestration worldwide. Conservation practices, particularly non- tillage or reduced tillage, are important to enhance C sequestration from FNC in croplands.
DOI	10.1016/j.scitotenv.2024.174954
WOS记录号	WOS:001288534900001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/76038
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Liu, Dong,Zhou, Ziyan,Iqbal, Shahid,et al. Fungal necromass contribution to carbon sequestration in global croplands: A meta-analysis of driving factors and conservation practices[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2024,949:174954.
APA	Liu, Dong.,Zhou, Ziyan.,Iqbal, Shahid.,Dou, Ting Ting.,Bonito, Gregory.,...&Yu, Fuqiang.(2024).Fungal necromass contribution to carbon sequestration in global croplands: A meta-analysis of driving factors and conservation practices.SCIENCE OF THE TOTAL ENVIRONMENT,949,174954.
MLA	Liu, Dong,et al."Fungal necromass contribution to carbon sequestration in global croplands: A meta-analysis of driving factors and conservation practices".SCIENCE OF THE TOTAL ENVIRONMENT 949(2024):174954.

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