Dynamic contribution of microbial residues to soil organic matter accumulation influenced by maize straw mulching

doi:10.1016/j.geoderma.2018.07.017

	Dynamic contribution of microbial residues to soil organic matter accumulation influenced by maize straw mulching
	Liu, Xiao 2,3; Zhou, Feng 2,5; Hu, Guoqing 4; Shao, Shuai 2,5; He, Hongbo 1,2; Zhang, Wei 2; Zhang, Xudong 2; Li, Lijun 6
刊名	GEODERMA
	2019
卷号	333 页码:35-42
关键词	Maize straw mulching Microbial residue Amino sugar Soil organic matter
ISSN号	0016-7061
DOI	10.1016/j.geoderma.2018.07.017
英文摘要	Soil degradation is a serious problem in northeast China due to the routine removal of aboveground crop residues under conventional tillage systems; thus, crop residue retention becomes an essential approach for maintaining and improving soil organic matter (SOM) in this area. However, the impact of returning crop residue on microbial-driven SOM accumulation remains unclear. In this context, an 8-year field experiment with maize straw mulching (SM) was conducted in northeast China to evaluate how maize straw return may influence the dynamic contribution of microbial residues to SOM accumulation. Conventional cultivation was used as a control (CR), in which only 10 cm of aboveground maize biomass remained after the annual harvest. Soil samples (0-10 cm) were collected after the annual harvest for the measurement of soil organic carbon (SOC) and amino sugars (AS). Based on a first-order model, we found that soil microbial residue accumulation in this temperate arable soil might reach a steady state within decades under a specific agricultural management practice. Maize straw mulching both strengthened the retention ability of soil microbial residues and expanded their accumulation capacity. According to the glucosamine to muramic acid ratio, maize straw mulching facilitated the accumulation of fungal residues more than bacterial ones. Compared to maize residue removal, maize straw mulching accelerated the accumulation of microbial residues in SOM and enhanced the contribution of microbial residues to SOM sequestration in the surface soil, likely elucidating the pivotal mechanisms by which the "4/1000" initiative goal for agricultural soil will be met, at least for the first 10 years. Because bacterial residues are actively involved in SOM turnover while fungal residues dominantly contribute to SOM accrual enhanced by maize straw return compared to maize residue removal, we conclude that SOM in this arable field might be stabilized at a higher sequestration capacity under management with maize straw mulching.
资助项目	National Key Research & Development Program[2016YFD0200307] ; National Natural Science Foundation of China[41630862] ; National Natural Science Foundation of China[41571237] ; "China Soil Microbiome Initiative: Function and regulation of soil - microbial systems" of the Chinese Academy of Sciences[XDB15040200]
WOS研究方向	Agriculture
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447117100004
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123471]
专题	中国科学院沈阳应用生态研究所
通讯作者	He, Hongbo; Zhang, Wei
作者单位	1.Natl Field Observat & Res Stn Shenyang Agroecosys, Shenyang 110016, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Liaoning, Peoples R China 3.Shandong Agr & Engn Univ, Jinan 250100, Shandong, Peoples R China 4.Shandong Agr Univ, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Coll Resources & Environm, Tai An 271018, Shandong, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.China Geol Survey, Shenyang Ctr, Shenyang 110032, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiao,Zhou, Feng,Hu, Guoqing,et al. Dynamic contribution of microbial residues to soil organic matter accumulation influenced by maize straw mulching[J]. GEODERMA,2019,333:35-42.
APA	Liu, Xiao.,Zhou, Feng.,Hu, Guoqing.,Shao, Shuai.,He, Hongbo.,...&Li, Lijun.(2019).Dynamic contribution of microbial residues to soil organic matter accumulation influenced by maize straw mulching.GEODERMA,333,35-42.
MLA	Liu, Xiao,et al."Dynamic contribution of microbial residues to soil organic matter accumulation influenced by maize straw mulching".GEODERMA 333(2019):35-42.