Planting experiments of dipterocarps in East Kalimantan (Indonesia)
1991
Priasukmana, S. (Forest Research Institute Samarinda, East Kalimantan (Indonesia))
Some planting experiments of dipterocarps species were carried out by FRI Samarinda on the area damaged by fire and on the area of industrial forest plantation or "timber estate". Enrichment planting with strip-line system was applied in the area damaged by fire while in the timber estate, mixed planting with fast growing species was used. Two years after planting, the survival rate for Shorea species was low in the area damaged by fire and a little better in the timber estate, while Dryobalanops was better than Shorea sp. These intermediate results also showed that S. polyandra, S. johorensis, S. smithiana and S. oleose grow better than the other Shorea species. In these experiments, dipterocarps which are growing under Leucaena leucocephala and under Paraserianthes falcataria grew better than under Eucalyptus and Anthocephalus chinensis. The experiment of planting dipterocarps under rubber trees showed a promising prospect in the future. The problem of mixed planting of dipterocarps with "fast growing species" and rubber trees will arise when extracting fast growing species, if the planting space was not designed properly. Therefore, FRI Samarinda is also doing experiments on planting space of fast growing species in rubber plantation.
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