Rational land-use types in the karst regions of China: Insights from soil organic matter composition and stability

doi:10.1016/j.catena.2017.09.029

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	Rational land-use types in the karst regions of China: Insights from soil organic matter composition and stability
	Chang, Jingjing 4; Zhu, Jianxing 3,4; Xu, Li 3,4; Su, Hongxin 2; Gao, Yang 3,4; Cai, Xianli 1; Peng, Tao 1; Wen, Xuefa 3,4; Zhang, Jinjing ; He, Nianpeng 3,4
刊名	CATENA
	2018
卷号	160 页码:345-353
关键词	C-13 NMR Humic acid Soil organic carbon Functional groups Soil nutrient
ISSN号	0341-8162
DOI	10.1016/j.catena.2017.09.029
文献子类	Article
英文摘要	Composition and stability of soil organic matter (SOM) affect the sustenance and productivity of soil over the long-term. This issue is particularly important for karst regions in China where the water supply and fertilizer use are limiting factors. Here, we used four indicators to evaluate changes in the composition and stability of SOM quantitatively in five main land-use types in karst area, including primary forest [PF], 15-year secondary forest [SF], grazing secondary forest [GF], abandoned farmland [AF] and farmland [FL]. We collected soil samples at a depth of 0-20 cm to conduct the analyses. Four indicators were used: soil physical and chemical properties, active organic carbon (C), humus C composition, and SOM functional groups. Our results showed that the content of SOM, total nitrogen, and easily oxidized organic C at 0-20 cm soil depth differed among the five land use types (P < 0.05). For humic acid C concentration, the land-use types were ordered as: SF > PF > GF > FL > AF. Solid-state C-13 NMR spectra showed that the highest ratio of Alkyl C/O-alkyl C was in AF, while the lowest was in SF. Overall, the comprehensive quality of SOM in different land-use types was PF (setting 100%) > SF (83.1%) > GF (58%) > AF (30.9%) > FL (29.9%). For karst areas, we suggest that farmlands in sloping area should be converted back to forests, with only moderate grazing being permitted, whereas farmlands in the plains should implement grain-forage rotation and grain-soybean rotation to meet the needs of the growing population and economic development. In conclusion, our findings provide a scientific basis from which to delineate rational land-use types for different land (geographical and geological) formations.
学科主题	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
电子版国际标准刊号	1872-6887
出版地	AMSTERDAM
WOS关键词	C-13 NMR-SPECTROSCOPY ; LONG-TERM IMPACT ; SEQUESTRATION RATES ; CARBON FRACTIONS ; MANAGEMENT ; FOREST ; QUALITY ; VEGETATION ; SUCCESSION ; ROTATION
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000414880400035
资助机构	Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41571130043, 31570471] ; National Key R AMP ; D Program of China [2016YFC0500202] ; Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/20559]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Jilin Agr Univ, Coll Resources & Environm, Changchun 130118, Jilin, Peoples R China 5.Chinese Acad Sci, Puding Karst Ecosyst Res Stn, Anshun 562100, Peoples R China
推荐引用方式 GB/T 7714	Chang, Jingjing,Zhu, Jianxing,Xu, Li,et al. Rational land-use types in the karst regions of China: Insights from soil organic matter composition and stability[J]. CATENA,2018,160:345-353.
APA	Chang, Jingjing.,Zhu, Jianxing.,Xu, Li.,Su, Hongxin.,Gao, Yang.,...&He, Nianpeng.(2018).Rational land-use types in the karst regions of China: Insights from soil organic matter composition and stability.CATENA,160,345-353.
MLA	Chang, Jingjing,et al."Rational land-use types in the karst regions of China: Insights from soil organic matter composition and stability".CATENA 160(2018):345-353.