Soil Inorganic Carbon Sequestration Following Afforestation Is Probably Induced by Pedogenic Carbonate Formation in Northwest China

doi:10.3389/fpls.2017.01282

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	Soil Inorganic Carbon Sequestration Following Afforestation Is Probably Induced by Pedogenic Carbonate Formation in Northwest China
	Liu, Jiabin 2,3; Liu, JB (reprint author), Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Peoples R China.; Liu, JB (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China.; Pang, Yue 1; Tian, Jing 1; Gao, Yang 1,3
刊名	FRONTIERS IN PLANT SCIENCE
	2017
卷号	8
关键词	Afforestation Degraded Semiarid Regions Pedogenic Inorganic Carbon Soil Inorganic Carbon Stable Carbon Isotope
ISSN号	1664-462X
DOI	10.3389/fpls.2017.01282
文献子类	Article
英文摘要	In arid and semiarid areas, the effects of afforestation on soil organic carbon (SOC) have received considerable attention. In these areas, in fact, soil inorganic carbon (SIC), rather than SOC, is the dominant form of carbon, with a reservoir approximately 2-10 times larger than that of SOC. A subtle fluctuation of SIC pool can strongly alter the regional carbon budget. However, few studies have focused on the variations in SIC, or have used stable soil carbon isotopes to analyze the reason for SIC variations following afforestation in degraded semiarid lands. In the Mu Us Desert, northwest China, we selected a shifting sand land (SL) and three nearby forestlands (Populus alba) with ages of 8 (P-8), 20 (P-20) and 30 (P-30) years, and measured SIC, SOC, soil organic and inorganic delta C-13 values (delta C-13-SOC and delta C-13-SIC) and other soil properties. The results showed that SIC stock at 0-100 cm in SL was 34.2 Mg ha(-1), and it increased significantly to 42.5, 49.2, and 68.3 Mg ha(-1) in P-8, P-20, and P-30 lands, respectively. Both delta C-13-SIC and delta C-13-SOC within the 0-100 cm soil layer in the three forestlands were more negative than those in SL, and gradually decreased with plantation age. Afforestation elevated soil fine particles only at a depth of 0-40 cm. The entire dataset (260 soil samples) exhibited a negative correlation between d13C-SIC and SIC content (R-2 = 0.71, P < 0.01), whereas it showed positive correlation between SOC content and SIC content (R-2 = 0.52, P < 0.01) and between delta C-13-SOC and delta C-13-SIC (R-2 = 0.63, P < 0.01). However, no correlation was observed between SIC content and soil fine particles. The results indicated that afforestation on shifting SL has a high potential to sequester SIC in degraded semiarid regions. The contribution of soil fine particle deposition by canopy to SIC sequestration is limited. The SIC sequestration following afforestation is very probably caused by pedogenic carbonate formation, which is closely related to SOC accumulation. Our findings suggest that SIC plays an important role in the carbon cycle in semiarid areas and that overlooking this carbon pool may substantially lead to underestimating carbon sequestration capacity following vegetation rehabilitation.
学科主题	Plant Sciences
URL标识	查看原文
出版地	LAUSANNE
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000406113800001
资助机构	National Natural Science Foundation of China [31500585]; Fundamental Research Fund for the Central Universities [Z109021619]; Natural Science Foundation of Shaanxi Province [2016JQ3021] ; National Natural Science Foundation of China [31500585]; Fundamental Research Fund for the Central Universities [Z109021619]; Natural Science Foundation of Shaanxi Province [2016JQ3021] ; National Natural Science Foundation of China [31500585]; Fundamental Research Fund for the Central Universities [Z109021619]; Natural Science Foundation of Shaanxi Province [2016JQ3021] ; National Natural Science Foundation of China [31500585]; Fundamental Research Fund for the Central Universities [Z109021619]; Natural Science Foundation of Shaanxi Province [2016JQ3021]
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7958]
专题	水保所科研产出--SCI_2017--SCI
通讯作者	Liu, JB (reprint author), Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Peoples R China.; Liu, JB (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China.
作者单位	1.Northwest A&F Univ, Coll Forestry, Yangling, Peoples R China 2.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling, Peoples R China 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jiabin,Liu, JB ,Liu, JB ,et al. Soil Inorganic Carbon Sequestration Following Afforestation Is Probably Induced by Pedogenic Carbonate Formation in Northwest China[J]. FRONTIERS IN PLANT SCIENCE,2017,8.
APA	Liu, Jiabin,Liu, JB ,Liu, JB ,Pang, Yue,Tian, Jing,&Gao, Yang.(2017).Soil Inorganic Carbon Sequestration Following Afforestation Is Probably Induced by Pedogenic Carbonate Formation in Northwest China.FRONTIERS IN PLANT SCIENCE,8.
MLA	Liu, Jiabin,et al."Soil Inorganic Carbon Sequestration Following Afforestation Is Probably Induced by Pedogenic Carbonate Formation in Northwest China".FRONTIERS IN PLANT SCIENCE 8(2017).