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Sun, Bingyin
- Response of Radial Growth of Pinus armandii to Climate Change in the Qinling Mountains
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Authors
Affiliations
1 College of Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, CN
2 Yangling Vocational and Technical College, Yangling, Shaanxi, 712100, CN
1 College of Sciences, Northwest A&F University, Yangling, Shaanxi, 712100, CN
2 Yangling Vocational and Technical College, Yangling, Shaanxi, 712100, CN
Source
Nature Environment and Pollution Technology, Vol 15, No 3 (2016), Pagination: 903-909Abstract
At present, there is limited research on the effect of climate change on the growth of trees in the Qinling Mountains, and the effect of altitude has rarely been considered. In order to accurately grasp the impact of climatic factors on the natural forest in this region, the effect of water and temperature conditions on the radial growth of Pinus armandii was studied according to dendroclimatology principles. Response function and multivariate regression methods were applied to study the response of the tree-rings, including earlywood width and latewood width, of P. armandii at three elevations (1600-1800, 1800-2000, 2000-2200 m) to climate change in this region. The results showed that the radial growth of P. armandii at the three elevations contained rich climatic information. The tree-ring widths at the three elevations were significantly negatively correlated with September temperature of the previous year and May temperature of the current year (P < 0.05) and were also negatively correlated with August precipitation of the previous year and May precipitation of the current year. The late-wood width of P. armandii at 1600-1800 m and 1800-2000 m was less sensitive to temperature and precipitation than that of the earlywood. The latewood width of P. armandii at 2000-2200 m was significantly negatively correlated with December temperature of the previous year and May temperature of the current year (P < 0.01), and was significantly and positively correlated with August precipitation of the previous year (P < 0.05). Characteristic analysis of the special years showed that large quantities of precipitation in September and October of the previous year were more likely to result in the formation of a very wide tree-ring. High spring and summer temperatures and less precipitation from April to June more likely resulted in the formation of extremely narrow tree-rings. Therefore, high precipitation in autumn of the previous year was conducive to the growth of P. armandii, whereas high temperature and drought in spring and summer inhibited the growth of P. armandii.Keywords
Qinling Mountains, Pinus armandii, Tree-Ring Width, Climate Change.Full Text
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