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Dida Syamsuwida
Bogor Seed Technolog y Research Institute
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ECOLOGICAL CONDITIONS AND DISTRIBUTION OF GEMOR TREE SPECIES IN CENTRAL AND EAST KALIMANTAN Adinugroho, Wahyu C.; Sidiyasa, Kade; Rostiwati, Tati; Syamsuwida, Dida
Indonesian Journal of Forestry Research Vol 8, No 1 (2011): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

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Abstract

The aim of this study was to determine the ecological conditions and distribution of gemor bark producing tree species at Tuanan village in Kapuas District, Central Kalimantan Province and Long Daliq village in Kutai Barat, East Kalimantan Province. In order to collect adequate vegetation data, several obser vation plots were laid out by using purposive sampling. Primary and secondary data were collected from the plot areas by obser ving directly the habitat and its ecological condition of vegetation. It was revealed that the gemor tree species tended to grow well on the habitats which have a thin layer of peat (< 2 m), pH 3 – 4 and in a humid climatic condition.  Two gemor bark producing tree species were identidfied in the study areas, namely Nothaphoebe coriacea (Kosterm.) Kosterm. and  N. umbelliflora Blume. The similarity level of vegetation composition at both sites (Kapuas and Kutai Barat Districts) was low. The tree species richness in the plot areas of Tuanan in Kapuas District, Central Kalimantan (82 species, 57 genera and 28 families) was higher than that found in Long Daliq, Kutai Barat District, East Kalimantan (38 species, 26 genera and 19 families).
TEKNIK PENYIMPANAN SEMAI KAYU BAWANG ( Dysoxylum moliscimum ) MELALUI PEMBERIAN ZAT PENGHAMBAT TUMBUH DAN PENGATURAN NAUNGAN Syamsuwida, Dida; Aminah, Aam
Jurnal Penelitian Hutan Tanaman Vol 8, No 3 (2011): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Peningkatan Produktivitas Hutan

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PENENTUAN KARAKTERISTIK FISIOLOGIS BENIH KRANJI ( BERDASARKAN NILAI KADAR AIR Pongamia pinnata) Aminah, Aam; Syamsuwida, Dida
Jurnal Penelitian Hutan Tanaman Vol 10, No 1 (2013): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Peningkatan Produktivitas Hutan

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ABSTRACTPongamia pinnata is one of sources for biodiesel. This study aims to determine physiological and biochemical parameters of seed for planting and biodiesel production. Seed properties were analyzed such as moisture content, germination percentage, biochemical content (protein, starch and electrical conductivity) as well as oil contents. Initial moisture content of seeds was done by means of heat treatment in oven for 24 hours 103OC. Reduction of moisture content of seeds for germination test was conducted by means of incubation for 0, 24, 48 and 72 hours at 35OC. The results revealed the highest germination (92%) was reached at the moisture content of 46.80 % after desiccating for 48 hours. The content of protein and starch were 14.84% and 15.01% respectively and electrical conductivity was 815 millimho. Moisture content for seedling cultivation was 46.8% and for biodiesel was 51.37% with rendemen of 11.47%. The content of fat tended to decrease during desiccation.ABSTRAKKranji (Pongamia pinnata) adalah salah satu jenis tanaman yang berperan dalam menyediakan dua sumber energi yaitu biomassa kayu untuk kayu bakar dan biji mengandung minyak nabati yang dapat dimanfaatkan sebagai sumber biodiesel. Penelitian ini bertujuan untuk mengetahui parameter fisiologis dan biokimia setelah terjadinya penurunan kadar air dalam rangka penyediaan bahan tanaman dan bahan baku biodiesel. Metode yang digunakan untuk pengujian kadar air benih awal adalah pengeringan dengan oven pada suhu 1030C ± 20C selama 24 jam. Perlakuan penurunan kadar air benih dilakukan dengan metode penyimpanan dalam inkubator untuk P1 = 0 jam (kontrol); P2 =24 jam; P3 = 48 jam dan P4 = 72 jam. Parameter yang diamati meliputi kadar air, daya kecambah, kandungan biokimia benih (protein, pati dan Daya Hantar Listrik/DHL) serta rendemen minyak. Hasil penelitian menunjukkan bahwa pengeringan yang tepat untuk bibit kranji adalah 48 jam. Perlakuan ini menghasilkan benih dengan kadar air 46,39%, protein 14,84%, pati 15,01% dan DHL 815 millimho dan daya kecambah 92%. Perubahan biokimia benih kranji selama penurunan kadar air memperlihatkan adanya peningkatan protein dan daya hantar listrik seiring dengan lamanya pengeringan serta penurunan kandungan lemak dan kandungan pati. Berdasarkan perubahan fisiologis dan biokimia yang terjadi, benih kranji memiliki kecenderungan bersifat rekalsitran. Kadar air benih untuk bibit tanaman adalah 48,6% sedangkan untuk produksi biodiesel 51,37% dengan rendemen 11,47%. Kandungan minyak terus menurun selama penurunan kadar air.
DAMPAK PERUBAHAN FISIOLOGI DAN BIOKIMIA BENIH EBONI ( Diospyros celebica Bakh.) SELAMA PENYIMPANAN Yuniarti, Naning; Syamsuwida, Dida; Aminah, Aam
Jurnal Penelitian Hutan Tanaman Vol 10, No 2 (2013): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Peningkatan Produktivitas Hutan

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ABSTRACTThe research was objected to determine the impact on biochemical and physiological changes of eboni (Diospyros celebica Bakh.) seeds during storage. Completely randomized design was used in this trial with two treatments, i.e storage room condition and storage periods. The results showed that physiological changes of the seeds during storage decreased their germination percentage and seed moisture content. Biochemical changes as indicated by the increase of fat and protein contents, as well as reduction of carbohydrat content following the period of drying and storage were observed. Storing the seeds in an Air-Conditioned room could keep germination percentages at 61,94% with the moisture content at 46,69% for as long as 8 weeks. Based on physiological and biochemical responses, eboni seeds could be classified as recalcitrant type.ABSTRAKEboni  (Diospyros  celebica Bakh.)  merupakan  jenis  tanaman  yang potensial  untuk dikembangkan  padapembangunan hutan tanaman. Benih bermutu tinggi diperlukan dalam program pengembangan jenis ini dan penyimpanan benih tidak dapat dihindari berkaitan dengan penyediaan benih. Penyimpanan benih eboni ditujukan untuk mempertahankan viabilitas benih agar tetap tinggi. Tujuan penelitian adalah untuk mengetahui dampak perubahan kandungan biokimia dan fisiologis benih eboni selama penyimpanan. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap pola Faktorial dengan perlakuan faktor ruang simpan  dan  periode penyimpanan.  Hasil  penelitian  menunjukkan perubahan  fisiologis benih eboni  selama penyimpanan mengakibatkan adanya penurunan nilai daya berkecambah dan kadar air benih ; perubahan biokimia benih eboni selama penyimpanan menunjukkan adanya peningkatan kandungan lemak dan protein serta penurunan kandungan karbohidrat seiring dengan lamanya pengeringan dan penyimpanan ; penyimpanan benih eboni di ruang simpan AC dapat mempertahankan viabilitas benih selama 8 minggu, dengan daya berkecambahnya hingga 61,94% dengan kadar air 46,69 %. Berdasarkan reaksi fisiologis dan biokimia yang terjadi, maka benih eboni dapat dikatagorikan sebagai benih rekalsitran.
ECOLOGICAL CONDITIONS AND DISTRIBUTION OF GEMOR TREE SPECIES IN CENTRAL AND EAST KALIMANTAN Adinugroho, Wahyu C.; Sidiyasa, Kade; Rostiwati, Tati; Syamsuwida, Dida
Indonesian Journal of Forestry Research Vol 8, No 1 (2011): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2011.8.1.50-64

Abstract

The aim of this study was to determine the ecological conditions and distribution of gemor bark producing tree species at Tuanan village in Kapuas District, Central Kalimantan Province and Long Daliq village in Kutai Barat, East Kalimantan Province. In order to collect adequate vegetation data, several obser vation plots were laid out by using purposive sampling. Primary and secondary data were collected from the plot areas by obser ving directly the habitat and its ecological condition of vegetation. It was revealed that the gemor tree species tended to grow well on the habitats which have a thin layer of peat (< 2 m), pH 3 – 4 and in a humid climatic condition.  Two gemor bark producing tree species were identidfied in the study areas, namely Nothaphoebe coriacea (Kosterm.) Kosterm. and  N. umbelliflora Blume. The similarity level of vegetation composition at both sites (Kapuas and Kutai Barat Districts) was low. The tree species richness in the plot areas of Tuanan in Kapuas District, Central Kalimantan (82 species, 57 genera and 28 families) was higher than that found in Long Daliq, Kutai Barat District, East Kalimantan (38 species, 26 genera and 19 families).
Co-Authors Aam Aminah Kade Sidiyasa Naning Yuniarti Tati Rostiwati Wahyu C. Adinugroho