PERLAKUAN BENIH, PENCANGKOKAN DAN STEK PUCUK Eusideroxylon zwageri T.et.B. (Seed Treatment, Air Layering and Stem Cutting of Eusideroxylon zwageri T.et.B.)

• Main Author: , Fx. Dwisutanto
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Fak. Kehutanan UGM 2000
• Online Access: https://repository.ugm.ac.id/94742/; http://repository.ugm.ac.id/digitasi/index.php?module=cari_hasil_full&idbuku=2541
• Institution: Universitas Gadjah Mada

<p>Dlin or kayu besi (Eusideroxylon zwageri T.etB) is an important timber species in East Kalimantan.<br /> However, there are problems in the regeneration of this species. Mechanical method for seed scarification<br /> by cutting at the seed end where radicle emerges provided the best germination percentage (100 %)<br /> compareCi with untreated seed (75 %), while sulphuric acid (H2S04) had very detrimental effect on<br /> germination (0 %).<br /> Air layering method could be utilized to propagate genetically superior individuals and to increase<br /> forest production. The use of IBA I % gave higher success rate compared with without hormone<br /> treatment, even though statistically not significant. Branch diameter larger than 3 em resulted in complete<br /> failure of the branch to root. With regard to stem cutting the application of Rootone F at rates of 500 -<br /> 1000 ppm gave the highest rooting ability (80 - 84 %), while no hormone treatment only resulted in 69<br /> % of the shoot to have roots.</p>