Widiyatno W.,Gadjah Mada University |
Soekotjo S.,Gadjah Mada University |
Naiem M.,Gadjah Mada University |
Purnomo S.,PT Sari Bumi Kusuma |
Setiyanto P.E.,PT Sari Bumi Kusuma
Journal of Tropical Forest Science | Year: 2014
The objective of the present study was to evaluate the growth of selected species of dipterocarps as reforestation potential. The trial was conducted using 23 potential species of dipterocarps and random complete block design, with four blocks used as replication. Diameter at breast height (dbh), height and survival rate were measured at 6.5 years. There was significant difference in dbh. The best two species were Shorea platyclados and S. leprosula where dbh values were 16.6 and 14.3 cm respectively. The species with the lowest dbh was Dipterocarpus caudiferus, 5.7 cm. Height growth was also significantly different. The two tallest species were S. platyclados and S. leprosula (8.6 and 8.3 m respectively). The species with the lowest height was D. caudiferus (4.4 m). Seven species showed high survival rates (71 to 85%), nine species moderate (50 to 70%) and seven species low (38 to 48%). © Forest Research Institute Malaysia.
Ruslandi,University of Florida |
Jatmoko,PT Sari Bumi Kusuma |
Japrianto,PT Sari Bumi Kusuma |
Purnomosidi,PT Sari Bumi Kusuma |
And 5 more authors.
Journal of Tropical Forest Science | Year: 2015
In logged-over stands in Central Kalimantan, Indonesia, in which Shorea leprosula seedlings were planted along cleared lines 14-15 years before this study, buttress heights and total surface areas were measured on naturally-regenerated and planted trees 20-40 cm diameter at 1.3 m height. Maximum buttress heights were 0.14 m (41%) higher on naturally-regenerated trees. Contrary to our expectations, the tallest buttresses were not concentrated on the uphill sides of tree bases nor on the opposite side of the trunk from the longest crown radius but crowns did extend farthest downslope. These findings suggest some minor adjustments to timber yield projections if the buttressed portions of the lowermost logs are not harvested. © Forest Research Institute Malaysia.