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Converting alfalfa pasture into annual cropland achieved high productivity and kept soil organic carbon in a semiarid area

文献类型：期刊论文

作者Zhang, Xu-Long2; Zhao, Yang-Yang2; Gao, Wen-Juan1; Song, Xin2; Zhang, Xin-Tan2; Shi, Xiao-Yan2; Li, Feng-Min2
刊名LAND DEGRADATION & DEVELOPMENT
出版日期2020-11-19
页码9
ISSN号1085-3278
关键词conversion of alfalfa into cropland carbon sequestration fertilization land use soil moisture total N
DOI10.1002/ldr.3808
通讯作者Li, Feng-Min(fmli@lzu.edu.cn)
英文摘要Converting 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.
WOS关键词PLASTIC-FILM MULCH ; LONG-TERM FERTILIZATION ; LOESS PLATEAU ; WATER-USE ; MULTISITE ASSESSMENT ; P AVAILABILITY ; FORAGE LAND ; GRAIN-YIELD ; SEQUESTRATION ; NITROGEN
资助项目International Cooperation and Exchange Programme[BP0719040] ; National Natural Science Foundation of China[31470496]
WOS研究方向Environmental Sciences & Ecology ; Agriculture
语种英语
出版者WILEY
WOS记录号WOS:000590192100001
资助机构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 ; 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
源URL[http://ir.ihb.ac.cn/handle/342005/39330]  
专题水生生物研究所_其他_期刊论文
通讯作者Li, Feng-Min
作者单位1.Chinese Acad Sci, Inst Hydrobiol, Wuhan, Peoples R China
2.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Inst Arid Agroecol, Sch Life Sci, Lanzhou, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：水生生物研究所

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