Journal of Applied and Natural Science 6 (2): 484-488 (2014)
Growth status and site quality of different seed production areas of teak
(Tectona grandis L. f) in Karnataka, India.
Rajesh P. Gunaga1*, Avinash M. Kanfade2 and R. Vasudeva3
1College of Forestry, Navsari Agricultural University, Navsari (Gujarat), INDIA
2Research Coordinator, Institute of wood Science and Technology, Bangalore (Karnataka), INDIA
3College of Forestry, University of Agricultural Sciences, Sirsi Campus (Karnataka), INDIA
*Corresponding authors. E-mail: email@example.com
Abstract : In the present study 20 SPAs of teak distributed in southern, central and northern parts of Karnataka, India
are selected. Phenotypic parameters of standing trees of different SPAs were recorded. Further, seed yield was also
recorded and compared with site quality and stand growth parameters. Result showed that there was a greater
variation among SPAs for phenotypic growth characters as well as site quality. The overall growth of SPAs of
Madikeri zone (Southern region) was found to be superior with respect to tree height, clear bole height and DBH.
SPAs belonged to Dandeli (Northern region) recorded more DBH and nearly round stem. SPAs of Yallapur seed
zone showed comparatively less growth over Madikeri zone. SPA of Dandeli zone recorded the more tree volume
and top height, followed by SPA of Madikeri zone. Considering site quality of different SPAs, all the studied SPAs of
Karnataka are growing under relatively poor site conditions. Sixteen out of twenty SPAs, nearly 80% were growing in
areas with site quality classes IV and V. Interestingly, none of the studied SPAs belonged to either class I or II.
Association study showed that tree height (r=0.403) and clear bole height (r=0.412) showed positive relationship
with seed yield. Furthermore, site quality showed a weak positive relationship with seed yield (R2=0.052) among
SPAs indicating poor site quality could be a major factor for low seed yield. It is concluded that SPAs of Madikeri
and Dandeli zones performed better in growth and stem form. Therefore, it is suggested to collect quality seeds from
these seed zones.
Keywords : Fruit yield, Phenotypic traits, Seed production area, Tectona grandis.