Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland

doi:10.1016/j.foreco.2015.11.048

	Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland
	Hu, Ya-Lin 1,2; Zeng, De-Hui 2; Ma, Xiang-Qing 1; Chang, Scott X.3
刊名	FOREST ECOLOGY AND MANAGEMENT
	2016-02-01
卷号	362 页码:38-45
关键词	Cropland Afforestation Subsurface Soil Litter Input Soc Sequestration C-13 Stable Isotope
ISSN号	0378-1127
DOI	10.1016/j.foreco.2015.11.048
英文摘要	Afforestation on croplands has been proposed as a means to mitigate the increasing emission of anthropogenic CO2. However, the relative contribution of above- and belowground litter input on soil organic carbon (SOC) sequestration following afforestation is not fully understood. We used a 270-day laboratory incubation experiment to examine the impact of litter type (i.e., leaf vs. fine root litter) of a poplar tree (Populus simonii Carr., C-3 plant) on soil respiration and the turnover of new vs. old soil C in surface (0-10 cm) and subsurface mineral soils (40-50 cm) collected from a marginal cropland planted to maize (Zea mays L., C-4 plant) in a semi-arid region in northeast China. Our results showed that fine root rather than leaf litter addition helps to sequester SOC even though soil microbial respiration rates were stimulated by both leaf and fine root litter input. Neither leaf nor fine root litter addition stimulated mineralization of old soil C across the two soil layers, but more new C was incorporated into the soil with fine root addition as compared with leaf litter addition. Moreover, the subsurface soil had greater potential to sequester SOC as compared to the surface soil. Our results suggest that root rather than leaf litter input drives soil carbon sequestration on the marginal soil, especially in the subsurface soil, and planting deep-rooted trees with large belowground biomass production could be used to increase SOC sequestration in marginal croplands. (C) 2015 Elsevier B.V. All rights reserved.
WOS研究方向	Forestry
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000369556700005
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/122437]
专题	中国科学院沈阳应用生态研究所
通讯作者	Hu, Ya-Lin
作者单位	1.Fujian Agr & Forestry Univ, Coll Forestry, Fuzhou 350002, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110164, Peoples R China 3.Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada
推荐引用方式 GB/T 7714	Hu, Ya-Lin,Zeng, De-Hui,Ma, Xiang-Qing,et al. Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland[J]. FOREST ECOLOGY AND MANAGEMENT,2016,362:38-45.
APA	Hu, Ya-Lin,Zeng, De-Hui,Ma, Xiang-Qing,&Chang, Scott X..(2016).Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland.FOREST ECOLOGY AND MANAGEMENT,362,38-45.
MLA	Hu, Ya-Lin,et al."Root rather than leaf litter input drives soil carbon sequestration after afforestation on a marginal cropland".FOREST ECOLOGY AND MANAGEMENT 362(2016):38-45.