dc.contributor.author |
Wang, Weiqi |
dc.contributor.author |
Wang, Chun |
dc.contributor.author |
Sardans i Galobart, Jordi |
dc.contributor.author |
Min, Qingwen |
dc.contributor.author |
Zeng, Congsheng |
dc.contributor.author |
Tong, Chuan |
dc.contributor.author |
Peñuelas, Josep |
dc.date |
2015 |
dc.identifier |
https://ddd.uab.cat/record/132374 |
dc.identifier |
urn:10.1016/j.catena.2015.05.003 |
dc.identifier |
urn:oai:ddd.uab.cat:132374 |
dc.identifier |
urn:scopus_id:84929463112 |
dc.identifier |
urn:wos_id:000359960600017 |
dc.identifier |
urn:oai:egreta.uab.cat:publications/01aa22da-4d92-48fc-a79b-3a0e38b31289 |
dc.identifier |
urn:articleid:18726887v133p171 |
dc.format |
application/pdf |
dc.format |
application/pdf |
dc.language |
eng |
dc.publisher |
|
dc.relation |
European Commission 610028 |
dc.relation |
Agència de Gestió d'Ajuts Universitaris i de Recerca 2009/SGR-458 |
dc.relation |
Ministerio de Ciencia e Innovación CGL2010-17172/BOS |
dc.relation |
Catena ; Vol. 133 (October 2015), p. 171-178 |
dc.rights |
open access |
dc.rights |
Tots els drets reservats. |
dc.rights |
https://rightsstatements.org/vocab/InC/1.0/ |
dc.subject |
Nitrogen |
dc.subject |
Phosphorus |
dc.subject |
N:P |
dc.subject |
Land-use change |
dc.subject |
Decoupling of nutrient |
dc.subject |
Stoichiometry |
dc.title |
Agricultural land use decouples soil nutrient cycles in a subtropical riparian wetland in China |
dc.type |
Article |
dc.description.abstract |
Altres ajuts rebuts per a dur a terme el treball: Grant from the National Science Foundation of China (31000209) |
dc.description.abstract |
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. |