Polyethylene film mulching enhances the microbial carbon-use efficiency, physical and chemical protection of straw-derived carbon in an Entisol of the Loess Plateau

doi:10.1016/j.scitotenv.2021.148357

	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, Fei 1,2,3; Zhu, Yin 3; Wang, Zhi-Ye 3; Deng, Hao-Liang 4; Li, Pu-Fang 5; Sun, Shi-Kun 6; Xiong, You-Cai 7
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-10-20
卷号	792 页码:11
关键词	Microbial carbon use efficiency Straw-derived carbon Soil aggregation Plastic mulching C-13-labeling
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.148357
通讯作者	Mo, Fei(mofei@nwafu.edu.cn)
英文摘要	The 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.
资助项目	Natural 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]
WOS关键词	SOIL ORGANIC-MATTER ; RESIDUE-CARBON ; PADDY SOIL ; RICE STRAW ; NITROGEN ; DECOMPOSITION ; FRACTIONS ; DYNAMICS ; POOLS ; PLANT
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000689486600003
资助机构	Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Project Open Program of Key Lab ; Application of Gansu Province
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164950]
专题	中国科学院地理科学与资源研究所
通讯作者	Mo, Fei
作者单位	1.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
推荐引用方式 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.