In vivo growth study on two gymnosperms and four angiosperms for REB wood poles

IRG/WP 98-10246

A K Lahiry

Revealed that the highest growth rates and pole yield in two plantation sites in Bangladesh are significant with 2.06 cm/y in diameter, 0.97 m/y in height and 90% pole yield within 19y in Pinus caribaea; 1.96 cm/y, 0.91 m/y and 100% pole yield within 15y in Xylia dolabriformis; 1.88 cm/y, 0.91 m/y and 22% pole yield within 13y in Dipterocarpus turbinatus; 1.64 cm/y, 0.82 m/y and 28.75% pole within 13y in Hopea odorata; 1.33 cm/y, 0.44 m/y and 100% pole yield within 28y in Polyalthia longifolia and 1.07 cm/y, 0.45 m/y and 00% pole yield within 15y in Podocarpus neriifolia. The study indicated that with 1.8m x l.8m spaced monocultured well managed plantation might produce about 33% poles within first 10y, additional 33% within 15y and rest 33% within 20y from Pinus caribaea, Xylia dolabriformis and Dipterocarpus turbinatus. Similar pole yield would be expected from Hopea odorata with rotation of harvesting of 15, 20 and 25y and from Polyalthia longifolia, Podocarpus neriifolia of 20, 25 and 30y. Revealed that the rate of growth in diameter increases with the increase of space of plantation and rate of growth in hight increases with the decrease of space between trees.


Keywords: GROWTH RATES; POLE YIELD; DIAMETER; HEIGHT; WOOD POLES

Conference: 98-06-14/19 Maastricht, The Low Countries


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