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2016 | 64 | 2 |
Tytuł artykułu

Water- and N-induced changes in soil C:N:P stoichiometry and its implications for N limitation of a desert steppe species, Glycyrrhiza uralensis

Autorzy
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Changes in precipitation patterns and the deposition of atmospheric nitrogen (N) increase the possibility of altering soil carbon (C):N:phosphorus (P) stoichiometry through their effects on soil C and nutrient dynamics, especially in water- and N-limited ecosystems. We conducted separate 2-year watering and N addition experiments, and examined soil C:N:P stoichiometry, relative growth rate, and leaf N resorption traits of Glycyrrhiza uralensis Fisch in a desert steppe of northwestern China. Our objectives were to determine how soil C:N:P stoichiometry responded to climate change, and its indications for plant growth and N resorption. The results showed that additional water increased N loss and thus decreased N availability, resulting in high N resorption from senescing leaves of G. uralensis. N addition increased N availability, consequently reducing plant N dependence on leaf resorption. High relative growth rates occurred with intermediate N:P and C:N ratios, while high N resorption occurred with a low N:P ratio but a high C:N ratio. Our results indicate that soil C:N:P stoichiometry also could be a good indicator of N limitation for desert steppe species. Altered soil C:N:P stoichiometry affects the N strategy of plants, and will be expected to further influence the structure and function of the desert steppe community in the near future.
Wydawca
-
Rocznik
Tom
64
Numer
2
Opis fizyczny
p.241-254,fig.,ref.
Twórcy
autor
  • Institute of Environmental Engineering, Ningxia University, No. 489 Helanshan West Road, Yinchuan 750021, China
autor
  • College of Resources and Environment, Ningxia University, No. 539 Helanshan West Road, Yinchuan 750021, China
autor
  • Institute of Environmental Engineering, Ningxia University, No. 489 Helanshan West Road, Yinchuan 750021, China
autor
  • Institute of Environmental Engineering, Ningxia University, No. 489 Helanshan West Road, Yinchuan 750021, China
autor
  • Department of Ecosystem Science and Management, The Pennsylvania State University, 116 ASI Building, University Park, PA 16802, USA
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Typ dokumentu
Bibliografia
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