Organic carbon accumulation and microbial activities in arable soils after abandonment: A chronosequence study

doi:10.1016/j.geoderma.2023.116496

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	Organic carbon accumulation and microbial activities in arable soils after abandonment: A chronosequence study
	Zhou,Jie; Sun,Tingting; Shi,Lingling; Kurganova,Irina; Gerenyu,Valentin Lopes de; Kalinina,Olga; Giani,Louise; Kuzyakov,Yakov
	2023
发表期刊	GEODERMA
ISSN	1872-6259
卷号	435 页码:116496
摘要	Increased plant carbon (C) input into the soils after cropland abandonment results in not only C accumulation, but also higher microbial activities and consequently faster organic matter decomposition. We investigated the link between soil C accumulation and microbial properties in a chronosequence (0-65 years) of post-agricultural self-restoration of Luvisols - the dominating soil type worldwide. Microbial biomass carbon (MBC) and enzyme activities increased in the top soil (0-20 cm) during the 37-year period of self-restoration. Accumulation of microbial biomass was faster than of soil organic C at earlier stages of self-restoration (0-22 years) because of the fast microbial growth induced by labile litter components. The response of microbial activity was more sensitive to land use changes compared to that of soil organic C. Activities of enzymes responsible for C cycle increased more than that of nitrogen (N) and phosphorus (P) cycles at least up to 37 years after abandonment, indicating microbial adaptations to high input of litter with wide C/N and C/P ratios. Similarly, beta-xylosidase was the solely enzyme which reached the activity similar to secondary forest soils after 65 years, due to the accumulation of recalcitrant C in litter with cropland abandonment age. The increased C demand was caused by the higher bacterial portion in soil microbial community (based on PLFA composition), which in turn, resulted in a lower microbial biomass C/N ratio. Enzyme stoichiometry revealed that microorganisms were limited by C and N in the topsoil during the self-restoration up to 37 years. Overall, the quantity and quality of plant C inputs, which changed with post-agricultural land restoration, regulated the microbial activity and enzyme production, offering a profound comprehension of ecosystem succession.
关键词	Cropland abandonment Soil microbial biomass Microbial nutrient limitation Self-restoration Chronosequence approach EXTRACELLULAR ENZYME-ACTIVITY ECOENZYMATIC STOICHIOMETRY VEGETATION RESTORATION NUTRIENT LIMITATION SELF-RESTORATION LAND ABANDONMENT COMMUNITY DYNAMICS LITTER BIOMASS
学科领域	Agriculture
DOI	10.1016/j.geoderma.2023.116496
收录类别	SCI
WOS记录号	WOS:001001872400001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75584
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Zhou,Jie,Sun,Tingting,Shi,Lingling,et al. Organic carbon accumulation and microbial activities in arable soils after abandonment: A chronosequence study[J]. GEODERMA,2023,435:116496.
APA	Zhou,Jie.,Sun,Tingting.,Shi,Lingling.,Kurganova,Irina.,Gerenyu,Valentin Lopes de.,...&Kuzyakov,Yakov.(2023).Organic carbon accumulation and microbial activities in arable soils after abandonment: A chronosequence study.GEODERMA,435,116496.
MLA	Zhou,Jie,et al."Organic carbon accumulation and microbial activities in arable soils after abandonment: A chronosequence study".GEODERMA 435(2023):116496.

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