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All Journal JURNAL PERBENIHAN TANAMAN HUTAN
Yulianti Bramasto
Forest Tree Seed Technology Research & Development Center /FTSTRDC-Research Development and Innovation Agency for Forestry and Environment
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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Germination of Tisuk (Hibiscus macrophyllus Roxb.) Seed at Several Treatments of Lighting Period, Pre-germination and Storage Dede J. Sudrajat; Yulianti Bramasto
Jurnal Perbenihan Tanaman Hutan Vol 6, No 1 (2018): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (209.801 KB) | DOI: 10.20886/bptpth.2018.6.1.49-60

Abstract

Tisuk (Hibiscus macrophyllus Roxb.) is a potential fast growing species to cultivate in a forest community and forest plantation. This species has strong seed dormancy that causing  its germination becomes obstacle in seedling procurement. The aim of this research was to determine the response of tisuk seed germination on the several lighting periods, pre-germination treatment, and storage rooms by using 4 tisuk populations (Sumedang, Ciamis, Pemalang and Malang) in Java.  Randomized completely design was used to test the optimum lighting periods, pre-germination treatments, and storage rooms for tisuk seeds. The result showed that lighting periods was the only treatment which affected significantly the seedlot from Pemalang. Seed germination testing of tisuk in laboratory was preferred to use lighting period of 8 hours light and 16 hours dark. Tisuk seed is categorized as orthodox with strong dormancy level so the seed germination capacity and speed without pre-germination treatment were very low that is  ranged between  5.5 percent ─̶ 8.3 percent and 0.62 percent-etmal─̶ 0.91percent-etmal, respectively. Pre-germination treatment by soaking the seeds in  H2SO4 for 30 minutes was able to increase germination capacity and speed for all seedlots from 4 different populations with germination capacity and speed ranges of 62.5 percent ─̶ 71.3 percent and 7.58 percent-etmal ─̶ 9.75 percent-etmal, respectively. Tisuk seed of all the  populations were  deteriorating during storage and seed with the lower moisture content had better storability. The seed germination could be maintained better in Dry Cold Storage than in a refrigerator and ambient room.
Growth and Genetic Parameters of Mindi (Melia azedarach Linn.) Progeny Test in Parungpanjang Forest Research Station, Bogor NFN Danu; Yulianti Bramasto; Dede J. Sudrajat
Jurnal Perbenihan Tanaman Hutan Vol 9, No 1 (2021): Jurnal Perbenihan Tanaman Hutan
Publisher : Forest Tree Seed Technology Research & Development Center (FTSTRDC)/ Balai Penelitian dan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/bptpth.2021.9.1.59-73

Abstract

Mindi (Melia azedarach Linn., family Meliaceae) is a multipurpose forest tree species such as for furniture, vinier and plywood, otherwise the leaves for pesticide and medicine material. Mindi mostly cultivated in a community forest, especially in West Java. This study was aimed to assess the growth performance and genetic parameter of the progeny test of mindi at Parungpanjang Forest Research Station, Bogor, West Java. The progeny test was established by using a randomized complete block design, consisting of 6 blocks and 73 families and each family consisting of 4 trees row-plot. The survival at 7 years old was 57.48%, height was 7.15 m and diameter is 8.59 cm, in average. The height and diameter growths among families showed a significantly different. The best family growth in height and diameter were Sumedang-31 and Bogor-18 families, respectively.The individual and family heritabilities for both stem diameter and  tree heght characters were stil relatively low, with the higher family heritability value than individual heritability.  The genetic correlation between total height and stem diameter of 0.57 indicates a strong correlation between the traits.
Co-Authors Dede J. Sudrajat NFN Danu