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Carbon Storage Dynamics in Alfalfa (Medicago sativa) Fields in the Hilly-Gully Region of the Loess Plateau, China
Deng, L (Deng, Lei)[ 1 ]; Wang, KB (Wang, Kai-Bo)[ 2 ]; Li, JP (Li, Jian-Ping)[ 3 ]; Shangguan, ZP (Shangguan, Zhou-Ping)[ 1 ]; Sweeney, S (Sweeney, Sandra)[ 4 ]
2014-09-15
Source PublicationCLEAN-SOIL AIR WATER
Volume42Issue:9Pages:1253-1262
Subtype期刊论文
Abstract

Alfalfa (Medicago sativa) has been widely employed in the dryland region of the Loess Plateau, China to improve soil and water conservation and to develop livestock production. Our objective was to study the dynamics of plant and soil organic carbon (SOC) pools following the conversion of sloping farmland to alfalfa fields over a period of 30 years. The succession gradient is composed of seven differently aged alfalfa fields (0, 5, 9, 13, 16, 23, 30 years). The results show that soil C storage (0-100cm) dynamics were consistent with belowground biomass storage with increased planting years, but C storage always increased with the number of planting years in the 0-5cm soil layer. Planted perennial alfalfa resulted in a decline in soil C storage in the 0-100cm soil depth in the early period (nine years). During the late succession stage of alfalfa (13 years) soil C storage tends to recover, and after 16 years, storage values again dropped. However, it had recovered by 30 years at which time alfalfa productivity was very low. Vegetation C storage was mainly decided by the belowground biomass and ecosystem C storage dynamics was consistent with soil C storage. Vegetation biomass, root/shoot ratio, SOC, soil total nitrogen, and total phosphorus were the main factors affecting C storage in the entire alfalfa field ecosystem. The results suggest that C storage in vegetation is directly related to plant productivity, C storage in the soil throughout the entire alfalfa field ecosystem was not only related to plant productivity, but also to SOC and soil nutrients.

KeywordCarbon Sequestration Ecosystems Soil Organic Carbon Space-for-time Method
DOI10.1002/clen.201300079
Indexed BySCIE
Language英语
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9699
Collection生态环境研究室
Corresponding AuthorShangguan, ZP (Shangguan, Zhou-Ping)[ 1 ]
Affiliation1.State Key Laboratory of Soil Erosionand Dryland Farming on the LoessPlateau, Northwest A&F University,Yangling, Shaanxi P. R. China;
2.State Key Laboratory of Loess andQuaternary Geology, Institute of EarthEnvironment, Chinese Academy ofSciences, Xi’an, P. R. China;
3.School of Agriculture, NingxiaUniversity, Yinchuan, P. R. China;
4.Institute of Environmental Sciences,University of the Bosphorus, Istanbul,Turkey
Recommended Citation
GB/T 7714
Deng, L ,Wang, KB ,Li, JP ,et al. Carbon Storage Dynamics in Alfalfa (Medicago sativa) Fields in the Hilly-Gully Region of the Loess Plateau, China[J]. CLEAN-SOIL AIR WATER,2014,42(9):1253-1262.
APA Deng, L ,Wang, KB ,Li, JP ,Shangguan, ZP ,&Sweeney, S .(2014).Carbon Storage Dynamics in Alfalfa (Medicago sativa) Fields in the Hilly-Gully Region of the Loess Plateau, China.CLEAN-SOIL AIR WATER,42(9),1253-1262.
MLA Deng, L ,et al."Carbon Storage Dynamics in Alfalfa (Medicago sativa) Fields in the Hilly-Gully Region of the Loess Plateau, China".CLEAN-SOIL AIR WATER 42.9(2014):1253-1262.
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