@Article{phyton.2018.87.123,
AUTHOR = {Wang XG, Wuyunna, CA Busso, YT Song, FJ Zhang, GW Huo},
TITLE = {Responses of C:N:P stoichiometry of plants from a Hulunbuir grassland to salt stress, drought and nitrogen addition},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {87},
YEAR = {2018},
NUMBER = {all},
PAGES = {123--132},
URL = {http://www.techscience.com/phyton/v87nall/33934},
ISSN = {1851-5657},
ABSTRACT = {Chemical elements, such as carbon (C), nitrogen (N)
and phosphorus (P), are major limiting nutrients in arid and semiarid
grasslands and their stoichiometry (C:N:P) is a very important
ratio to determine. In addition, it is critical to understand how plant
stoichiometry responds to multiple environmental factors at the species
level. In this study, we conducted a greenhouse experiment to
investigate the effects of salt stress (4 g NaCl/kg soil), drought (35%
of the soil water holding capacity) and N addition (10 g N/m<sup>2</sup>), as
well as their interactions, on C, N and P concentrations and C:N:P
ratios in two dominant species (<i>Allium polyrhizum</i> and <i>Stipa krylovii</i>)
from the Hulunbuir grassland of Inner Mongolia. <i>Allium polyrhizum</i>
had higher N and P concentrations, and lower C:N and C:P ratios
than <i>Stipa krylovii</i>. Salt stress significantly decreased plant C concentration,
while drought had no significant effects on all the study
variables of the two plant species. Nitrogen addition significantly increased
plant N concentrations, and decreased C:N and C:P ratios.
There were significant interactions between salt stress and species
identity in affecting plant C and N concentrations as well as C:N
and N:P ratios. This study could further enrich the knowledge of
plant stoichiometry in response to multiple environmental stresses.},
DOI = {10.32604/phyton.2018.87.123}
}