@Article{phyton.2016.85.100,
AUTHOR = {Yang G, Z Zhang, G Zhang, H Zhang, X Han, CA Busso},
TITLE = {Nitrogen deposition influences the response of <i>Potentilla tanacetifolia</i> to phosphorus addition},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {85},
YEAR = {2016},
NUMBER = {all},
PAGES = {100--107},
URL = {http://www.techscience.com/phyton/v85nall/37195},
ISSN = {1851-5657},
ABSTRACT = {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 <i>Potentilla tanacetifolia</i> in response to P fertilization under contrasting N addition rates in a typical meadow steppe in Inner Mongolia, China. Aboveground biomass of <i>P. tanacetifolia</i> 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.},
DOI = {10.32604/phyton.2016.85.100}
}