A review of dipterocarps - Center for International Forestry Research

Plantations 173
• Planting site: Site preparation techniques for lineplanting/underplanting/open
sites, optimal planting
stock size for line planting/underplanting.
• Planting: Deficiency symptoms, fertilisation trials;
if the fertilisation trials are observed over longer time
(e.g., into the weeding and cleaning period), it is advisable
to overlay the fertilisation trial with a tending
trial that includes a standard treatment.
• Tending: Selective weeding procedures, assessment
of weed vegetation concerning risks to the plantation
crop, investigation into control of weed growth
through shade management.
• Re-establishment by natural regeneration: Assessment
of existing dipterocarp plantations near rotation age
as to constitution, composition, canopy structure, regeneration
status, regeneration experiments in existing
older experimental dipterocarp plantations.
• Reforestation/afforestation: Investigations into site
amelioration techniques, species adaptation trials,
plantation site preparation procedures (nurse crops,
fertilisation soil improvement procedures).
• Agroforestry: Research should continue to test the
use of promising dipterocarp species as agroforestry
crop trees, e.g., Shorea macrophylla and other members
of the pinanga group, Shorea javanica, etc. Such
research would concentrate mainly on selection as well
as agri-silvicultural systems.
• Management: Stand establishment guidelines, speciessite
matching procedures, weeding guidelines, feasibility
studies on dipterocarp plantations, development
of production schemes with early financial returns,
growth analysis of the existing dipterocarp plantations.
Acknowledgements
The author wishes to express his gratitude to Dr. Aminah
Hamzah (Forest Research Institute Malaysia), Dr. J. McP
Dick (Institute of Terrestrial Ecology), Dr. D. Baskaran
(Forest Research Institute Malaysia), Dr. B. Hahn-
Schilling (Malaysian-German Project ‘Forest
Mananagement Information System Sarawak’), Dr. R.
Nussbaum (Société Générale de Surveillance), Mr. R.
Ong (Forest Research Centre, Sandakan, Sarawak), Dr.
D. Simorangkir (University of Mulawarman), Mr. Truong
Quang Tam (Institute of Tropical Biology, Vietnam) for
providing important information. Dr. S. Appanah (Forest
Research Institute Malaysia), Dr. P. Moura-Costa
(Innoprise) and Dr. S.N. Rai (Forest Survey of India)
kindly read the manuscript and their useful comments
are gratefully acknowledged.
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