Perbanyakan tanaman ganitri secara generatif mengalami hambatan karena terjadinya dormansi kulit sehingga benih sulit untuk berkecambah. Salah satu cara yang dapat dilakukan untuk memenuhi kebutuhan bibit adalah melalui perbanyakan secara vegetatif dengan stek pucuk. Penelitian ini bertujuan untuk mengetahui keberhasilan tumbuh stek pucuk ganitri ( ) pada aplikasi antara media dan hormon tumbuh di persemiaan. Rancangan penelitian yang digunakan adalah rancangan acak kelompok (RAK) dengan pola faktorial 4 x 4. Faktor A adalah media tumbuh yang terdiri dari : A . Pasir, A . pasir : arang sekam (1 : 1), A . pasir : sabut kelapa (1 : 1) dan A . sabut kelapa : arang sekam (1 : 1), faktor B adalah hormon /zat pengatur tumbuh (ZPT) IAAyang terdiri dari : B . 0 ppm; B . 100 ppm; B . 200 ppm dan B . 300 ppm, setiap kombinasi perlakuan diulang tiga (3) kali serta masing-masing ulangan terdiri dari 15 stek. Parameter yang diamati adalah persen hidup, keberhasilan pembentukkan tunas (jumlah dan berat kering), perakaran (jumlah, panjang dan berat kering). Hasil penelitian menunjukkan bahwa penggunaan media tumbuh pasir dan zat pengatur tumbuh IAA ppm 300 ppm (A B ) memberikan pertumbuhan terbaik dibandingkan kombinasi perlakuan yang lain. Hal tersebut ditunjukkan dengan persen hidup, jumlah tunas, jumlah akar, panjang akar berat kering akar berat kering tunas yang lebih tinggi yaitu berturut-turut 97,77%; 5,66 buah; 4,66 buah; 14,35 cm; 0,67 gram dan 1,57 gram. ABSTRACT Generative propagation of (ganitri) have barrier because of bark dormant with the result that seed is hard to be germinated. One of method to fulfill seedling requirement is vegetative propagation by shoot cutting. The objective of this research was to determine the effect of media and growth hormone on shoot cutting growth of Elaeocarpus ganitrus in nursery. A group completely randomized design 4 x 4 was used in this experiment. The main factors are growth media (A) and growth hormone IAA (B).

The objective of this research was to find out the transplanting media which is able to promote the best growth and quality of Manglieta glauca BI seedling. The experiment was conducted at the nursery of

ABSTRAK

Research on forest floor biomass and litter fall was conducted in Blanakan mangrove forest, Subang, West Java in July-December 2006. Stratified random sampling method was used with 2 plots of ± 50 m x 50 m each. Three observation spots in each plot were located purposively. Parameters observed were fresh weight, dry weight, moisture content, layer depth of organic material, and litter fall. The data then were analyzed using descriptive analysis. Result showed that the the available total biomass on Blanakan mangrove forest floor were 11.164 ton/ha and moisture content = 74.60%; the biomass consisted of humus layer = 4.37 ton/ha, fermentation-1 layer = 1.558 ton/ha, fermentation-2 layer = 0.84 ton/ha, and litter layer = 4.369 ton/ha. Litter layer was at the depth of 0-1 cm, fermentation layer was at 1-2.5 cm, and humus layer was at 2.5-3 cm. The rate of litter fall was 8.56 ton/ha/yr of fresh weight are 6.23 ton/ha/yr of dry weight. Based on mangrove species dominant at Blanakan, it was found that api-api (Avicennia marina (Forssk.) Vierh.) produced more litter than bakau (Rhizophora apiculata Blume) i.e. 6.51 ton/ha/yr and 4.95 ton/ha/yr respectively.