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- Title
鬼箭锦鸡儿叶片和土壤碳稳定同位素特征及其影响因素.
- Authors
艾喆; 徐婷婷; 李媛媛; 马飞
- Abstract
In order to explore the relationship of plant carbon (C) cycling with its habitat in the high?altitude regions, a leguminous shrub, Caragana jubata, that mainly distributed in those areas was studied. We collected leaf and soil samples of C. jubata from 35 sites along an east-west transect across the alpine regions of China. We measured leaf carbon stable isotope (δ13C), soil δ13C, and the difference between leaf and soil δ13 C (Δδ13 C) of each sampling site. We further analyzed the effects of climatic factors, leaf and soil elements on leaf δ13C, soil δ13C and Δδ13C. Results showed that leaf δ13C ranged from -30.9‰ to -27.1‰, with a mean value of -28.4‰, soil δ13 C ranged from -26.2‰ to -23.2‰, with a mean value of -25.3‰, and Δδ13C ranged from 2.0‰ to 7.7‰, with a mean value of 3.1‰. δ13C values of leaf was significantly lower than that of soil. Soil δ13C initially decreased and subsequently increased with increasing leaf δ13C. Leaf δ13C was negatively correlated with growing season temperature and leaf C content. Soil δ13C was negatively correlated with relative humidity and mean temperature of the warmest month, and was positively correlated with soil carbon:nitrogen (C:N). Soil δ13C firstly decreased and subsequently increased with soil C content. Δδ13C was positively correlated with leaf C content, soil C content, and soil C: N. Climatic factors directly affected leaf δ13C and Δδ13C, and indirectly affected leaf δ13C, soil δ13C and Δδ13C through their effects on leaf and soil elements. The C cycle of C. jubata was affected by climatic factors, leaf and soil elements in the alpine regions.
- Subjects
CHINA; ALPINE regions; LEAF temperature; STABLE isotopes; CARBON isotopes; GROWING season
- Publication
Yingyong Shengtai Xuebao, 2021, Vol 32, Issue 5, p1744
- ISSN
1001-9332
- Publication type
Article
- DOI
10.13287/j.1001-9332.202105.004