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Converting alfalfa pasture into annual cropland achieved high productivity and kept soil organic carbon in a semiarid area
Zhang, Xu-Long1; Zhao, Yang-Yang1; Gao, Wen-Juan2; Song, Xin1; Zhang, Xin-Tan1; Shi, Xiao-Yan1; Li, Feng-Min1
Corresponding AuthorLi, Feng-Min(fmli@lzu.edu.cn)
2020-11-19
Source PublicationLAND DEGRADATION & DEVELOPMENT
ISSN1085-3278
Pages9
AbstractConverting alfalfa (Medicago sativa L.) into annual cropland (rotated cropland, RC) is commonly done to reuse degraded alfalfa pasture. However, it is a big challenge for RC to achieve high productivity and maintain high soil organic carbon (SOC) to the levels achieved by previous alfalfa pasture. We converted a long-term alfalfa pasture into RC in 2010, and studied the effects of fertilization on soil moisture, crop productivity, and SOC in the RC and in continuous cropland (CC), both under plastic film mulching, from 2010 to 2018. Before the conversion, alfalfa pasture had a higher SOC (12.3%) and total N (7.7%) than CC. However, not only severe soil desiccation occurred, but the available P and inorganic-N were only about 39.4 and 25.1% of levels for CC. After the conversion, soil moisture in RC (measured at 0-0.6 m depth) was up to CC levels only after 1 year, and was restored to 95.3 and 69.2% of CC levels at 0.6-2 and 2-5 m depths only after 9 years. Crop yield and biomass in RCF (RC with fertilization) were comparable to those for CCF (CC with fertilization) after two years from conversion due to the increased available P and inorganic-N, and sufficient soil moisture restoration at 0-0.6 m depath. SOC in RC decreased by 8.1% over the 9 years, while RCF consistently kept SOC levels up to those of pre-conversion alfalfa pasture. These findings help to eliminate concerns about the continuously low production and rapid decline of SOC in croplands converted from alfalfa and suggest ways to support sustainable high-productivity and high SOC sequestration in dryland farming.
Keywordconversion of alfalfa into cropland carbon sequestration fertilization land use soil moisture total N
DOI10.1002/ldr.3808
Funding OrganizationInternational Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
Indexed BySCI ; SCI
Language英语
Funding ProjectInternational Cooperation and Exchange Programme[BP0719040] ; National Natural Science Foundation of China[31470496]
WOS Research AreaEnvironmental Sciences & Ecology ; Agriculture
WOS SubjectEnvironmental Sciences ; Soil Science
WOS IDWOS:000590192100001
WOS KeywordPLASTIC-FILM MULCH ; LONG-TERM FERTILIZATION ; LOESS PLATEAU ; WATER-USE ; MULTISITE ASSESSMENT ; P AVAILABILITY ; FORAGE LAND ; GRAIN-YIELD ; SEQUESTRATION ; NITROGEN
PublisherWILEY
Funding OrganizationInternational Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; International Cooperation and Exchange Programme ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
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Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/39331
Collection其他_期刊论文
Corresponding AuthorLi, Feng-Min
Affiliation1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Inst Arid Agroecol, Sch Life Sci, Lanzhou, Peoples R China
2.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Xu-Long,Zhao, Yang-Yang,Gao, Wen-Juan,et al. Converting alfalfa pasture into annual cropland achieved high productivity and kept soil organic carbon in a semiarid area[J]. LAND DEGRADATION & DEVELOPMENT,2020:9.
APA Zhang, Xu-Long.,Zhao, Yang-Yang.,Gao, Wen-Juan.,Song, Xin.,Zhang, Xin-Tan.,...&Li, Feng-Min.(2020).Converting alfalfa pasture into annual cropland achieved high productivity and kept soil organic carbon in a semiarid area.LAND DEGRADATION & DEVELOPMENT,9.
MLA Zhang, Xu-Long,et al."Converting alfalfa pasture into annual cropland achieved high productivity and kept soil organic carbon in a semiarid area".LAND DEGRADATION & DEVELOPMENT (2020):9.
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