| Registro completo |
| Provedor de dados: |
Phyton
|
| País: |
Argentina
|
| Título: |
Nitrogen deposition influences the response of Potentilla tanacetifolia to phosphorus addition
|
| Autores: |
Yang,G
Zhang,Z
Zhang,G
Zhang,H
Han,X
Busso,CA
|
| Data: |
2016-06-01
|
| Ano: |
2016
|
| Palavras-chave: |
Nitrogen
Phosphorus
N: P ratio
Plant organs
|
| Resumo: |
Phosphorus is an essential macronutrient for all living plants and plant production. Simultaneously, atmospheric nitrogen deposition also affects plant productivity at a global scale. However, few studies have investigated how plants respond to P addition while simultaneously considering N deposition. We investigated plant biomass, nutrient status and stoichiometric ratios on Potentilla tanacetifolia in response to P fertilization under contrasting N addition rates in a typical meadow steppe in Inner Mongol ia, China. Aboveground biomass of P. tanacetifolia increased under increasing levels of P fertilization under conditions of N addition. However, there was no significant change in biomass when only phosphorus was added. Plant leaf and stem P concentrations increased linearly with P addition when there was no N addition. Our results suggest that increased plant P nutrition under P addition will not turn into plant growth enhancement unless N demands are also satisfied. Nitrogen addition significantly increased leaf N concentrations, and leaf and seed N:P ratios, when there was no P fertilization. Nevertheless, the effects of N addition were weakened, and eventually disappeared when P fertilization rates increased. This indicates that N-induced alterations of the plant nutrition status and stoichiometric ratios were P availability-dependent. Overall, our results suggest that multiple-nutrient constraints and their interactions must be considered when assessing plant nutrient and growth responses to nutrient enrichment.
|
| Tipo: |
Info:eu-repo/semantics/article
|
| Idioma: |
Inglês
|
| Identificador: |
http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100014
|
| Editor: |
Fundación Rómulo Raggio
|
| Formato: |
text/html
|
| Fonte: |
Phyton (Buenos Aires) v.85 n.1 2016
|
| Direitos: |
info:eu-repo/semantics/openAccess
|
|
