气候变化领域集成服务门户(CCPortal): Total soil organic carbon increases but becomes more labile after afforestation in China's Loess Plateau

CCPortal

DOI	10.1016/j.foreco.2020.117911
	Total soil organic carbon increases but becomes more labile after afforestation in China's Loess Plateau
	Zhang Q.; Jia X.; Wei X.; Shao M.; Li T.; Yu Q.
发表日期	2020
ISSN	0378-1127
卷号	461
英文摘要	Afforestation of cropland is recommended as an effective approach to enhance soil organic carbon (SOC) sequestration and labile organic C fractions. However, the stabilization of SOC and its labile organic C fractions on the Loess Plateau is largely unknown. Our objective was to quantify total SOC concentration and labile organic C fractions in the 0–20 cm soil depth for four land use types on the Loess Plateau, including cropland and three afforested areas (composed of R. pseudoacacia forests, P. tabuliformis forests, and R. pseudoacacia + P. tabuliformis mixed forests). Total SOC concentration, particulate organic C (POC), dissolved organic C (DOC), microbial biomass C (MBC), and potassium permanganate-oxidizable C (KMnO4-C) were measured. Carbon management index (CMI) was also calculated. Afforestation showed a significant positive effect on total SOC and labile organic C fractions, compared with cropland. Afforestation with R. pseudoacacia, P. tabuliformis, and R. pseudoacacia + P. tabuliformis significantly increased POC by 57.4%, 22.2%, and 44.4% in the 0–5 cm soil layer; and similar increases were observed in the 5–10 cm and 10–20 cm layers. Similar trends to those observed for POC in response to afforestation were also seen for DOC, MBC, and KMnO4-C. Afforestation with R. pseudoacacia resulted in the highest total SOC concentrations and labile organic C fractions among the three afforestation treatments. These findings suggested that although afforestation can significantly promote total SOC accumulation, especially with R. pseudoacacia, SOC may become more labile following afforestation in the future. © 2020 Elsevier B.V.
关键词	Land use Landforms Manganese compounds Potash Reforestation Sediments Soils Afforestation Carbon management indices China's loess plateaux Cropland Effective approaches Loess Plateau Potassium permanganate Soil organic carbon Organic carbon afforestation biomass carbon sequestration concentration (composition)land use change organic carbon potassium soil depth soil organic matter Land Use Manganese Compounds Potassium Carbonate Potassium Permanganate Reforestation Sediments China Loess Plateau
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132964
推荐引用方式 GB/T 7714	Zhang Q.,Jia X.,Wei X.,et al. Total soil organic carbon increases but becomes more labile after afforestation in China's Loess Plateau[J]. Forest Ecology and Management,2020,461.
APA	Zhang Q.,Jia X.,Wei X.,Shao M.,Li T.,&Yu Q..(2020).Total soil organic carbon increases but becomes more labile after afforestation in China's Loess Plateau.,461.
MLA	Zhang Q.,et al."Total soil organic carbon increases but becomes more labile after afforestation in China's Loess Plateau".461(2020).