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Variations in water use efficiency and carbon and nitrogen concentrations in red heart Chinese fir.
You, R; Liu, Y; Deng, X; Hu, Y; Ouyang, S; Chen, L; Xiang, W; He, H.
Afiliación
  • You R; College of Life and Environmental Science, Central South University of Forestry and Technology, Changsha, Hunan Province, China.
  • Liu Y; College of Life and Environmental Science, Central South University of Forestry and Technology, Changsha, Hunan Province, China.
  • Deng X; College of Life and Environmental Science, Central South University of Forestry and Technology, Changsha, Hunan Province, China.
  • Hu Y; National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, Changsha, China.
  • Ouyang S; Huitong National Field Station for Scientific Observation and Research of Chinese Fir Plantation Ecosystem in Hunan Province, Huitong, China.
  • Chen L; College of Life and Environmental Science, Central South University of Forestry and Technology, Changsha, Hunan Province, China.
  • Xiang W; National Engineering Laboratory for Applied Technology of Forestry & Ecology in South China, Changsha, China.
  • He H; Huitong National Field Station for Scientific Observation and Research of Chinese Fir Plantation Ecosystem in Hunan Province, Huitong, China.
Plant Biol (Stuttg) ; 2024 Jul 16.
Article en En | MEDLINE | ID: mdl-39011596
ABSTRACT
Temperature can significantly (P < 0.05) affect plant growth by modifying water use strategies, which are determined by intrinsic water use efficiency (WUEi). Red Heart Chinese Fir (Cunninghamia lanceolata) is one of the most important ecological and economic plantation species in China. However, the C. lanceolata water use strategy in response to increased temperatures and uneven temporal distribution of precipitation during the growing season is rarely reported. In a 7-year-old C. lanceolata plantation, differences in WUEi and C and N concentrations in different organs were analysed by anova, and the δ13C stable isotope, C, and N concentrations in stems determined at different tree heights. Stepwise regression and variance inflation factor were used to remove autocorrelated factors, and structural equation modelling was then used to explore relationships between WUEi and climate and biological factors. WUEi differed significantly between leaf and branch at different standardized precipitation evapotranspiration indices (SPEI). WUEi and N concentration decreased with age. The highest WUEi in branches and leaves were 92.7 and 88.4 µmol·mol-1 in 2020 (SPEI = 0.00), respectively. δ13C increased with relative tree height but N concentration and C/N ratio were not affected. Air temperatures has increased in between 2014 and 2020. WUEi and N concentration decreased with increasing branch and leaf age, but C concentration increased. SPEI significantly positively affected WUEi (P < 0.05), and WUEi was significantly negatively related to C concentration, which is consistent with the trade-off between C and water.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Plant Biol (Stuttg) Asunto de la revista: BOTANICA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Reino Unido