DOI: 10.1016/j.foreco.2016.12.011
Scopus记录号: 2-s2.0-85007477093
论文题名: Comparison of nitrogen nutrition and soil carbon status of afforested stands established in degraded soil of the Loess Plateau, China
作者: Hu B. ; Zhou M. ; Dannenmann M. ; Saiz G. ; Simon J. ; Bilela S. ; Liu X. ; Hou L. ; Chen H. ; Zhang S. ; Butterbach-Bahl K. ; Rennenberg H.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 389 起始页码: 46
结束页码: 58
语种: 英语
英文关键词: Afforestation
; Degraded soil
; Mixed stand
; Monoculture
; Root N uptake
; Soil N availability
Scopus关键词: Agriculture
; Amino acids
; Forestry
; Land use
; Landforms
; Nitrogen
; Orchards
; Organic carbon
; Plants (botany)
; Reforestation
; Sediments
; Afforestation
; Degraded soils
; Mixed stands
; Monoculture
; N availability
; N uptakes
; Soils
; Juglans regia
; Pinus tabuliformis
; Robinia pseudoacacia
英文摘要: The Loess Plateau in China constitutes an area short of soil nitrogen and organic carbon due to local land degradation induced by various factors (i.e. long term changes of land use, climate conditions, and soil properties). The present study aimed to examine the effects of species and land management by afforestation on tree N acquisition capacity and soil N and C availability in degraded soils of the Loess Plateau area. We quantified root N uptake of inorganic and organic N sources as well as soil N and C availability, both at the tree species (i.e. Robinia pseudoacacia L., Juglans regia L. and Pinus tabulaeformis Carr.) and the land management (i.e. arable vs. monoculture vs. mixed afforested stands) levels. Our results indicated that afforestation improved soil N and organic C availabilities compared to abandoned arable land (p < 0.05). In particular, the presence of N2-fixing R. pseudoacacia enhanced root N concentrations (ca. 3.0 times) and soil NO3- (ca. 5.4 times), soil total N (ca. 1.9 times) and organic C (ca. 3.4 times) availabilities, but decreased soil NH4+ (ca. −33%), microbial biomass carbon (ca. −74%) and nitrogen (ca. −54%) in the mixed stand compared to J. regia monoculture. Under the experimental conditions applied, the afforested trees preferred organic over inorganic N compounds as well as NO3− over NH4+; J. regia in monoculture had a highest root amino acids N uptake capacities (i.e. 76.6 ± 7.7 nmol N (g fw)−1 h−1 for glutamine, 90.3 ± 8.9 nmol N (g fw)−1 h−1 for arginine) compared to other tree species whereas such high uptake capacities were largely repressed in the mixed stand with R. pseudoacacia. Thus, in the Loess Plateau area, the inter-planting system of J. regia with N2-fixing R. pseudoacacia could improve the total soil N and organic C pools as well as plant N cycling compared to traditional arable land use and J. regia monoculture system. This study shows that inter-planting R. pseudoacacia with economic fruit trees can be considered a successful strategy for soil regeneration by afforestation in future land management projects. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64502
Appears in Collections: 影响、适应和脆弱性
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作者单位: College of Forestry, Northwest A&F University, 3 Taicheng Road, Yangling, Shaanxi, China; Institute of Forest Sciences, Chair of Tree Physiology, University of Freiburg, Georges-Koehler-Allee 53/54, Freiburg, Germany; Institute for Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Karlsruhe Institute of Technology (KIT), Kreuzeckbahnstrasse 19, Garmisch-Partenkirchen, Germany; Chair of Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Konstanz, Germany; College of Life Sciences, Northwest A&F University, 22 Xinong Road, Yangling, Shaanxi, China; Institute of Bio- and Geosciences – Agrosphere (IBG-3), Forschungszentrum Jülich GmbH, Jülich, Germany
Recommended Citation:
Hu B.,Zhou M.,Dannenmann M.,et al. Comparison of nitrogen nutrition and soil carbon status of afforested stands established in degraded soil of the Loess Plateau, China[J]. Forest Ecology and Management,2017-01-01,389