Germination method for winged fruits: Kapur tree (Dryobalanops lanceolata)

Abstract

Dodo. 2016. Germination method for winged fruits: Kapur tree (Dryobalanops lanceolata). Pros Sem Nas Masy Biodiv Indon 2: 214-218. Dryobalanops lanceolata Burck is an endemic species to Borneo that can be used as commercial timber, cosmetics and medicines, but its existence has been threatened in the wild. Propagation of seedlings can be saved from extinction because the seedlings of D. lanceolata can be returned to their natural habitat. The germination of D. lanceolata winged fruits are considered less efficient because the wings meet the container, besides the river sand perceived as less appropriate for less binding water needed in the germination. The study aims to determine the proper method for germination of D. lanceolata winged fruit. Experiments using completely randomized design with two factors: the condition of the fruits (whole fruit, wingless fruit, and without calyx) and the type of growing medias (top soil, river sand, rice husk and Bioposka compost). Each experimental unit contains 10 fruits of D. lanceolata with three replications. The results showed that the average of germination rate was 77.5%, the speed of germination was 1.47 fruits/day, and the first day of germination on 4th day. The germination rate on wingless fruit (87.5%) is better and not significantly different from the whole fruit (85%) but significantly different from the fruit without calyx (60%). Germination of fruit on rice husk (86.7%) is better and not significantly different with top soil (83%) and compost (80%) but significantly different with river sand (60%). Best germination rate (100%) is indicated by a combination treatment of the whole fruit with top soil media. Proper germination methods specific to D. lanceolata winged fruit is a whole fruit or wingless fruit in top soil, rice husk, or compost media.