Per citar aquest document:
Scopus: 0 cites, Web of Science: 0 cites,
Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China
Wang, W. (Fujian shi fan da xue. Institute of Geography)
Wang, Chun (Fujian shi fan da xue. Institute of Geography)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i Aplicacions Forestals)
Min, Qingwen (Zhongguo ke xue yuan. Institute of Geographical Sciences and Natural Resources Research)
Zeng, C. (Fujian shi fan da xue. Institute of Geography)
Tong, Chuan (Fujian shi fan da xue. Institute of Geography)
Peñuelas, Josep (Centre de Recerca Ecològica i Aplicacions Forestals)

Data: 2015
Resum: We examined the impact of human changes in land use on the concentrations and stoichiometric relationships among soil carbon (C), nitrogen (N), phosphorus (P) and potassium (K) in a Phragmites australis riparian wetland (Minjiang River estuary, China). We compared a natural (unaltered) wetland with five altered land uses: intertidal mudflat culture and vegetable, flower, fruit and rice cultivations. All these land uses decreased C, N and K soil concentrations relative to those in the P. australis wetland. The close relationship between total soil C and N concentrations, under all land uses, suggested that N was the most limiting nutrient in these wetlands. The lower N concentrations, despite the use of N fertilizers, indicated the difficulty of avoiding N limitation in the agricultural land. Croplands, except rice cultivation, had lower soil N:P ratios than the original P. australis wetland, consistent with the tendency of favoring species adapted to high rates of growth (low N:P ratio). The release of soil C was less and the soil C:N and C:P ratios higher in the natural P. australis riparian wetland than in the croplands, whereas C storage was more similar. The levels of soil C storage were generally opposite to those of C release, indicating that C release by respiration was the most important factor controlling C storage. Cropland soil management promotes faster nutrient and C cycles and changes in soil nutrient stoichiometry. These impacts can further hinder the regeneration of natural vegetation by nutrient imbalances and increase C-cycling and C emissions.
Nota: Número d'acord de subvenció EC/FP7/610028
Nota: Número d'acord de subvenció AGAUR/2009/SGR-458
Nota: Número d'acord de subvenció MICINN/CGL2010-17172/BOS
Nota: Altres ajuts rebuts per a dur a terme el treball: Grant from the National Science Foundation of China (31000209)
Drets: Tots els drets reservats
Llengua: Anglès
Document: article ; recerca ; acceptedVersion
Matèria: Nitrogen ; Phosphorus ; N:P ; Land-use change ; Decoupling of nutrient ; Stoichiometry
Publicat a: Catena, Vol. 133 (Oct. 2015), p. 171-178, ISSN 0341-8162

DOI: 10.1016/j.catena.2015.05.003

Disponible a partir de: 2017-10-31
36.5 KB

El registre apareix a les col·leccions:
Documents de recerca > Documents dels grups de recerca de la UAB > Centres i grups de recerca (producció científica) > Ciències > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Articles de recerca
Articles > Articles publicats

 Registre creat el 2015-05-26, darrera modificació el 2016-06-04

   Favorit i Compartir