Instia spp is one kind of forest plant which have a high economic value for the development of plantation forest, there fore, there is a need a high seed supply. Plant growth regulators and plant mediums are important aspects in vegetative plant propagation especially by shoot cutting. The objective of this study was to evaluate the effect of plant growth regulators and plant mediums. The study was conducted at the Centre of Plantation Forest Research and Development from Juny to December 2004. The experiment was arranged in Complete Randomize Design with 2/actorial applications. The first factor are plant growth regulators: 0, 20 ppm IBA and !AA meanwhile the second factor are plant mediums: soil+ sand ( 1:1), sand+ compass ( 1: 1) and soil + sand+ compass ( 1: 1: 1 ), with 3 replications and 10 cuttings each. The experiment result showed that Instia spp could be propagated by shoot cutting, plant growth regulators gave better effect on the growth of soot cuttings and the fresh and dry weight of cuttings than untreated with plant medium consist of a high organic matter.
ABSTRAKMerbau (Instia spp) merupakan jenis tanaman hutan yang memiliki nilai ekonomi tinggi, dalam pembangunan hutan tanaman memerlukan pengadaan bi bit dalam jumlah ban yak. Sal ah satu upaya dalam pengadaan bibit adalah dengan perbanyakan tanaman secara stek pucuk. Zat pengatur tumbuh dan media tanam merupakan aspek penting dalam perbanyakan tanaman dengan cara tersebut. Penelitian yang bertujuan untuk mengetahui pengaruh zat pengatur tumbuh dan media tanam telah dilakukan di Pusat Litbang Rutan Tanaman sejak Juni sampai Desember 2004. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap dengan menguji 2 faktor perlakuan, yaitu faktor pertama zat pengatur tumbuh IBA dan IAA dengan konsentrasi O dan 20 ppm, sedangkan faktor kedua adalah media tanam yaitu campuran tanah + pasir (1: 1), pasir + kompos (1: 1) dan tanah + pasir + kompos (1: 1: 1) dengan ulangan sebanyak 3 kali dan setiap ulangan terdiri dari 10 stek. Parameter yang diamati meliputi pertumbuhan, bobot basah dan bobot kering stek dan volume akar stek. Hasil penelitian menunjukkan bahwa merbau dapat diperbanyak secara stek pucuk dan perlakuan zat pengatur tumbuh dapat meningkatkan pertumbuhan dan bobot segar dan bobot kering stek dengan media tanaman yang mengandung bahan organik tinggi.Kata kunci : Biomasa, media tanam, merbau, stek pucuk, zat pengatur tumbuh.
Plant productivity of H. odorata is still low due to not only uncertainly of seed supply for development of plantation forest, but also these seed have recalcitrant characters. for these reason, the vegetative plant propagation by shoot cuttings is necessary to solve these constrains. The study with objective to evaluate the application of nitrogen fertilizers on the shoot yield in hedge orchard and its quality as shoot cuttings, was conducted at The Kaliurang Hedge Orchard, Yogyakarta, from July to October 2002. The experiment was arranged as Complete Randomized Design with 5 treatmen�s of nitrogen fertilizers i.e. 7.5 g N (50 g NP K), 15 g N ( 100 g NP K), 23 g ( 50 g urea), 46 gNrplant ( 100 g urea) and control ( untreated) applied to 10 rows of plant as replications and 5 plants each. The observation was done on shoot yield (number and length of shoots) in hedge orchard and the quality of shoot cuttings was conducted at the end of experiment. The result showed that the application of 50 g urea/ plant gave better effect on number and length of shoot in hedge orchard, meanwhile application of 100 g NPK/plant gave better effect on quality of shoot cuttings than control.
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