Keywords :
annual ring,
cambial marking,
dendrochronology,
leaf phenology,
path analysis
บทคัดย่อ :
Teak (Tectona grandis Linn. f.), which grows naturally in the northern parts of Thailand, is widely
used to determine linkages between modern and palaeo-climates. But the knowledge about climate
inducing growth of teak planted in other sites of Thailand is still limited. This research attempted to
investigate the effect of climate on teak growing in a non-native distributed site with non-silviculture
management in Nakhon Ratchasima province, northeastern Thailand, using the techniques of
cambial marking and annual ring analysis. The results showed a strong negative correlation between
the annual ring formation and the mean temperature (Tmean) in March to August and illustrated a
weak correlation between the teak annual growth and regional climates of the Equatorial Southern
Oscillation Index (SOI) and the tropical Pacific Sea Surface Temperature (SST). Climate components
of Temperature, Precipitation, and Soil Moisture derived from the Principle Component Analysis (PCA)
directly induced teak growth through the occurrence of mature dark green leaves. The association of
climate components with the occurrence of mature dark green leaves induced increments in teak stem
diameter, both of wood and bark. Therefore, it can be concluded that teak growing at the non-native
distributed site can be used for investigating climate-growth relationship and climate reconstruction
as describe in the principle of dendrochronology.
เอกสารอ้างอิง :
Palakit, K., Lumyai, P. and Duangsathaporn, K., 2019. Influence of climate on the growth of teak (Tectona Grandis Linn. f.) at a non-native distributed site in northeastern Thailand. Chiang Mai J. Sci, 46(6), pp.1113-1128.
