KUALITAS BIBIT RAMIN (Gonystylus bancanus (Miq). Kurz) UNTUK PENANAMAN PENGAYAAN AREAL BEKAS TEBANGAN
ABSTRACT: Enrichment planting
in logged-over area needs high-quality seedlings that have high competitiveness,
when planted around or near to other plants that grow naturally. The aim of
this study is to find techniques to produce high-quality ramin seedlings. The studie
employr the following experimental methods : 1) split plot in time to study the
arbuscular mycorrhizal fungi (AMF) colonization in roots of natural
regeneration of ramin, 2) completely randomized design to study the growth of
ramin seedlings in the nursery, 3) randomized block design to study plant
growth of ramin at logged-over area. The results show that AMF colonization in
the root of ramin seedlings taken from thefield was highest at medium light
intensity. Meanwhile, the optimum light intensity to raise mycorrhizal
seedlings in the nursery is 55 % to 75 %. The AMF colonization increased height
and diameter growth, fresh and dry weights, macro-nutrients absorption,
dependency of P uptake (DPU), shoot-root ratio quality and index of ramin seedling
in the nursery. Ramin is highly dependent on AMF having a relative mycorrhizal
dependency (RMD) of more than 50 % and percent growth relative (PGR) of more
than 100 %. Rock phosphate of 50 g/polybag is sufficient to support the growth of
mycorrhizal seedlings in the nursery. The AMF colonization increases height and
diameter of ramin seedlings after being planted in the field (logged-over
area). It could be concluded that high quality ramin seedlings could be
produced by inoculation of AMF under optimum light intensity and optimum dosage
of rock phosphate.
Key words: ramin (G.
bancanus), light intensity, arbuscular mychorrhizal fungi (AMF), rock phosphate
Penulis: Abdurrani Muin
Kode Jurnal: jpkehutanandd110051
