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Polyethylene film mulching enhances the microbial carbon-use efficiency, physical and chemical protection of straw-derived carbon in an Entisol of the Loess Plateau
Mo, Fei1,2,3; Zhu, Yin3; Wang, Zhi-Ye3; Deng, Hao-Liang4; Li, Pu-Fang5; Sun, Shi-Kun6; Xiong, You-Cai7
2021-10-20
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume792Pages:11
Corresponding AuthorMo, Fei(mofei@nwafu.edu.cn)
AbstractThe global use of agricultural polyethylene mulches has emerged as a widespread farming practice, however, its effects on the fate and dynamics of crop straw-derived C in soil microbial biomass C (MBC), aggregate-associated and chemical recalcitrance-related C fractions are rarely assessed in situ. A two-year field experiment using C-13-labeled maize stem was carried out to quantify the allocation and dynamics of straw-C in an Entisol with and without plastic mulching. The results indicated that across the treatments, from 49.2% to 56.4% of straw-C-13 was released as CO2-C, from 34.9% to 43.1% was sequestrated as SOC pool, and from 6.7% to 9.7% remained undecomposed at the end of the experiment. Compared to non-mulching, plastic mulching significantly decreased the straw-derived CO2-C emissions by 14.6%, partially owing to the increased incorporation of straw-C into SOC pool. Across the treatments, the straw-derived MBC ranged from 14.4 to 147.9 mg C-13 kg(-1); and plastic mulching increased straw-derived MBC and microbial C use efficiency (CUE) of straw residue by 41.2% and 352% compared with non-mulching, respectively. The allocation dynamics of straw-C in each soil aggregate followed a sustained upward trend with time, while a significantly higher straw-C was incorporated into both macro- (> 0.25 mm) and micro-aggregates (025-0.053 mm) with plastic mulching. Compared to the non-mulching plastic mulching enhanced the inclusion of straw-C-13 in the chimerically more stable C fraction, especially at the late experimental period. We conclude that crop straw return combined with plastic mulching could improve SOC sequestration by enhancing microbial CUE, physical and chemical protection of straw-derived C in this dryland cropping system. (C) 2021 Elsevier B.V. All rights reserved.
KeywordMicrobial carbon use efficiency Straw-derived carbon Soil aggregation Plastic mulching C-13-labeling
DOI10.1016/j.scitotenv.2021.148357
WOS KeywordSOIL ORGANIC-MATTER ; RESIDUE-CARBON ; PADDY SOIL ; RICE STRAW ; NITROGEN ; DECOMPOSITION ; FRACTIONS ; DYNAMICS ; POOLS ; PLANT
Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of China[31801318] ; Natural Science Foundation of China[41967018] ; China Postdoctoral Science Foundation[2018M641028] ; Project Open Program of Key Lab ; Application of Gansu Province[GK2019-02]
Funding OrganizationNatural Science Foundation of China ; China Postdoctoral Science Foundation ; Project Open Program of Key Lab ; Application of Gansu Province
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000689486600003
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/164951
Collection中国科学院地理科学与资源研究所
Corresponding AuthorMo, Fei
Affiliation1.Chinese Acad Sci & Minist Water Resources, Inst Water & Soil Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Northwest A&F Univ, Coll Agron, Yangling 712100, Shaanxi, Peoples R China
3.Gansu Acad Sci, Inst Biol, Key Lab Microbial Resources Exploitat & Applicat, Lanzhou 730000, PR, Peoples R China
4.Hexi Univ, Coll Civil Engn, Zhangye 734000, Gansu, Peoples R China
5.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Peoples R China
6.Northwest A&F Univ, Minist Educ, Key Lab Agr Soil & Water Engn Arid & Semiarid Are, Yangling, Peoples R China
7.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Mo, Fei,Zhu, Yin,Wang, Zhi-Ye,et al. Polyethylene film mulching enhances the microbial carbon-use efficiency, physical and chemical protection of straw-derived carbon in an Entisol of the Loess Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,792:11.
APA Mo, Fei.,Zhu, Yin.,Wang, Zhi-Ye.,Deng, Hao-Liang.,Li, Pu-Fang.,...&Xiong, You-Cai.(2021).Polyethylene film mulching enhances the microbial carbon-use efficiency, physical and chemical protection of straw-derived carbon in an Entisol of the Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,792,11.
MLA Mo, Fei,et al."Polyethylene film mulching enhances the microbial carbon-use efficiency, physical and chemical protection of straw-derived carbon in an Entisol of the Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 792(2021):11.
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