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STRUKTUR DAN PENGEMBANGAN EMBRIO SOMATIK EKSPLAN DAUN Dyera lowii Hook.f. MELALUI TEKNIK IN-VITRO : Tri Suwarni Wahyudiningsih1*, Issirep Sumardi2 JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 2 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v11i2.45

Abstract

ABSTRACT The propagation of tree plus Dyera lowii can be anticipated by micropropagation via somatic embryogenesis. The study was aimed: 1). to determine the composition of growth regulators for induction of somatic embryos from leaf explant, 2). To study of the structure and development of somatic embryo D. lowii. The first leaf of seedling was utilized as sources of explants. The base leaf explant growth roots directly on MS (Murashige & Skoog) medium with 2 mg/l Kinetin + 7.5 mg/l IBA, but indirectly via callus phase at IBA 5 mg/l. The middle leaf explant produced somatic embryo resulting yellowish-white and compact texture on MS medium with 0.2 mg/l Benzyl Adenin + 0.5 mg/l IBA. Embryogenic callus cells have formed proembryonic stage: 2-cells, 4-cells, round, globular and heart phase. Keywords: Micropropagation, explant, somatic embryo, pro-embryo, suspensor
ANALISIS FINANSIAL REHABILITASI AREAL EKS IUPHHK-HA PT KAYON TIMBER COMPANY II DI PROVINSI KALIMANTAN TENGAH : Marthinus R. Lambung, Christopheros, Johanna Maria Rotinsulu dan Gimson Luhan JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 2 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v11i2.46

Abstract

ABSTRACT Forest concession of PT Kayon Timber Company II is one of some forest concessionaries in Central Kalimantan Province that must be rehabilitated. This research was aimed to analyze the financial feasibility of Indonesian Strips Cutting and Planting (TJTI) and Clear Cutting with Artificial Regeneration (THPB) silvicultural systems in order that to rehabilitate the site. The observation results of commercial standing stock for diameter ? 20 cm namely 36.7 stems/ha and volume of 21.2 m3/ha, meanwhile the total standing stock of forest namely 67.8 stems/ha and volume of 35.36 m3/ha. Applying the TJTI and THPB silvicultural systems are suitable at the interest rate of 18%. Profitable of IRR namely 18% bigger than social bank rate. Keynotes: Financial analysis, forest concession, profitable
ANALISIS PERTUMBUHAN DAN FINANSIAL TANAMAN SUNGKAI (Peronema canescens) DI KAPUAS, KALIMANTAN TENGAH : Wahyudi JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 2 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v11i2.47

Abstract

ABSTRACT Forestry concession conduct the plantation project at the logged over areas using TPTI silvicultural system. The aim of this research was to analyze the growth and financial value of sungkai (Peronema canescens) that be planted at the logged over areas of PT Gunung Meranti at the Kapuas, Central Kalimantan Province, using TPTI silvicultural system. The research analyzed of 100 samples of sungkai and it analysed of its growth until 13 years old and estimate of financial value until 40 years old at the future with loan interest assumption 19,5% and 16%, expense increase 10%, price decrease 10% and the form factor 0,6. The living percentage of sungkai at the 13 years old namely 89,7%. Mean Annual Increment (MAI) namely 11,90 m3/ha/year, and the best financial cycle for the worker of wood company class namely 13 to 25 years. Keywords: Analyze, financial, growth, Peronema canescens
Kualitas Papan Semen Partikel Kayu Mahang Quality Cement Board Particle Wood Mahang : Gimson Luhan, H.M. Damiri, John F. Gustaf JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 1 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v21i01.49

Abstract

ABSTRACT Exploiting the potential and diversity of types of peat swamp forest is not known (lesser known species) both types of timber and non-timber forest products, needs to be done to anticipate the reduction in the availability of commercial timber is to alternatively manufacture of cement particle board. As an alternative building materials manufacture of particle board has good prospects, given the increasing need tehadap shelter each year. Selection of wood types mahang as many grown on peat swamp forest in Central Kalimantan and nature meet the criteria of wood as raw material for cement particle board and supported by the manufacturing process is quite easy. The study aims to determine the effect of particle size and the ratio of adhesive cement with wooden particles mahang against mechanical and physical properties of particles produced cement board, and can determine the quality of the cement particle boards that meet the requirements of building materials. Based on the terms of quality of cement board wood patikel mahang produced, including a group of cement particle board type III (> 0,6 g / cm3), medium density of 0,40 g/cm3 - 0,80 g/cm3, and including cement particle boards used for wall with a specific gravity of 0,70 to 0,90. Based on the terms of raw material utilization efficiency of wood mahang then recommended a combination treatment a1b1 (the weight ratio of the amount of cement with particles 1: 1,5 and small particle size) produces cement particle board that filled the finest wood standard. Research advanced mechanical properties of cement particle board of wood to meet the internal bond (kg/cm2) and a strong grasp of the screw (kg). Keywords: wood particle mahang, cement, physics and mechanical properties of cement particle board
STUDI FLUKS KARBON DIOKSIDA PADA BERBAGAI TIPE PENGGUNAAN DI LAHAN GAMBUT PASANG SURUT DAN PEDALAMAN : Yosep1), Y.Sulistianto2), Adi Jaya2) 1)Fakultas Pertanian Universitas Palangka Raya JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 1 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v21i01.50

Abstract

ABSTRACK The aim of this study to known influence land use change in low tide and ombrotrophic peatland on forest land, ex-burns land, rubber tree land, and maize land and to known amount of microbial populations there. Data was recorded automatically by some equipments are chamber, Infrared CO2 analyzer (Fuji ZFP9GC11), injection 200 cc, Soda Lime, Vacuum plastic, Vacuum oven, termometer, FDR ML 2 Theta Probe Delta Y Device Co, Sensor water table, Lux meter, meter, camera, and paper label. Observation method was carried out at the village Kalampangan (ombrotrophic peatland) , district of Sebangau, Palangka Raya city, and at the village Purwodadi (low tide peatland), district of Maliku, Pulang Pisau Regency, starting from May up to July 2014. Observation variables consist of CO2 fluxes, fluctuations of groundwater levels, soil temperature, soil humidity and microbial populations. The results show that overall carbon dioxide fluxes higher in low tide peatland, with the highest fluxes in burnt areas, 430.24 mg C m-2 h-1, whereas in Ombrotrophic peatland, the highest on 292 forested land, 92 mg C m-2h-1. In Ombrotrophic peatland, relation between fluxes of carbon dioxide and the soil temperature is significant in the burnt areas with a value of R = 0.856 with a quadratic pattern, with the average temperature of 28.89 ° C. Fluxes of carbon dioxide significantly effected by soil moisture that is at a rubber plantation with a value of R = 0.640 with quadraticpatterned, average soil moisture of 0.61 m3/m-3. Fluxes of carbon dioxide to the groundwater depth is significant on a rubber plantation with a value of R = 0.872 with a quadratic pattern, and depth of groundwater on average of 83.74 cm. The populatuin of microorganisms, in forest land 137 sel/ml, rubber plantations 154 sel/ml, cornfields 157 sel/ml and ex-burnt is 80 sel/ml. In Low Tide peatland, fluxes of carbon dioxide to the soil temperature is significant in forest land with the value of R = 0.545 with cubic pattern, and the average temperature of 27,39 oC. Soil moisture has the siginificant effect to fluxes of carbon dioxide that is in the burnt areas with a value of R = 0.617 with patterned quadratic, and average soil moisture of 0.50 m3/m-3. The ground water depth has a siginificant effect to fluxes of carbon dioxide in a cornfield with a value of R = 0.743 with a quadratic pattern, and the depth of soil water on average of 68.98 cm. Population of soil microorganisms, in forest land 73 sel/ml, rubber plantations 36 sel/ml, cornfields 51 sel/ml and ex-burnt 18 sel/ml. Soil temperature, soil moisture, groundwater depth and microoganisms effect on carbon dioxide fluxes. Key words: Carbon dioxide, fluxes, microorganisms, peatland
Tabel Volume Pohon “Berkhout” pada Hutan Alam Tanah Kering di Wilayah Kapuas Hulu, Provinsi Kalimantan Tengah (The Local Table of Volume on the Dry Land Natural Forest at the Upper Stream Kapuas, Central Kalimantan Province) : Wahyudi JHT, Admin
Jurnal Hutan Tropika Vol 11 Nomor 1 Tahun 2016
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v21i01.52

Abstract

ABSTRACT The local table of volume is needed to determine volume of stands just based on their diameters in the certain of region. The research was aimed to create the local table of volume based on three groups of trees, namely Shorea groups, Dipterocarp non Shorea groups, and non Dipterocarp groups. Location of research was in Sub-District of Kapuas Hulu and Mandau Talawang, District of Kapuas, Central Kalimantan Province. Research method using tabel of volume equations in the form of Berkhout model that in order of regression equations. Research result showed that table of volume to Shorea groups, Dipterocarp non Shorea groups, and non Dipterocarp groups on the those two sub-districts are V = 0.00012D2.549, V = 0.000172D2.4319, and V = 0.00009D2.6292 respectively. According to the F test and R2 value, the local tables of volume are suitable used to predict the volume of the stands in the sites and their surrounding. Keywords: Dipterocarp, regression, shorea, table of volume.
KARAKTERISTIK SPEKTRAL ELEKTROMAGNETIK SPECIES DOMINAN PADA HUTAN RAWA GAMBUT KALIMANTAN TENGAH (Electromagnetic Spectral Characteristics of Dominant Species at the Peat-Swamp Forest at Central Kalimantan): Hendrik Segah1*, Freddy Wijaya1, Laju Gandharum2 dan Hiroshi Tani3 JHT, Admin
Jurnal Hutan Tropika Volume 9 Nomor 2 Tahun 2015
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v10i02.53

Abstract

ABSTRACTThis paper reports the results of the spectral library from dominant trees in peat-forest in Central Kalimantan, Indonesia supported under JST-JICA Project: “Wild Fire and Carbon Management in Peat Forest in Indonesia”. Spectral libraries are commonly established as a means to archive representative signatures of natural materials. Such signatures can then be used to train feature extraction and classification algorithms applied to remote sensing data imagery. Spectral analyses were performed to the 33 dominant species in peat-forest in Central Kalimantan, Indonesia obtained during the field survey measurement (in-situ measurements) and airborne campaign by HYMAP sensor in 2011-2014. We found, each vegetation type has unique spectral signature or characteristics. The shapes of reflectance spectra can be used for identification of vegetation types combine with remote sensing data (airborne and satellite images). Keywords: Spectral library/signature, Peat-Forest, Spectroradiometer, Vegetation and Kalimantan
PEMANFAATAN IJUK DAN LIMBAH PARTIKEL KAYU ALAU SEBAGAI BAHAN BAKU PAPAN PARTIKEL (Utilization of Palm Fibers and Wood Particle Waste of Alau as Particle Board Materials): Grace Sisca, Sarinah, Gimson Luhan JHT, Admin
Jurnal Hutan Tropika Volume 9 Nomor 2 Tahun 2015
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v10i02.54

Abstract

ABSTRACTParticle board is the multiuse materials that could be used as substitute materials of the solid wood as to review light in weight construction, furniture raw material, etc. Wood particle waste of alau is produced by saw mill or wood furniture as the waste, whereas the palm fibers is produced from non forestry plants of palm that grow well at the peat-swamp lands. This research was aimed to analyze the mixed of palm fibers and wood particle waste of alau to produce the particle board materials. Some combination of treatments were tested to produce the valuable particle board. The research results showed that the exact combination between palm fibers and wood particle waste of alau produced the valuable particle board materials with up to standars of JIS A 5908:2003 for review physical properties. The highest density of particle board and its stability dimension were attained at the moment of the composition between palm fibers and wood particle waste of alau namely 25:75 with glue content namely 40% . Keywords: palm fibers, particle board, physical properties,waste of alau
SKRINING ENZIM DARI SAMPEL DAUN JELUTUNG RAWA (Dyera lowii Hook f.) UNTUK ANALISIS ISOZIM SEBAGAI STUDI AWAL KERAGAMAN GENETIK (Screening Enzyme from Leaf of Dyera lowii Hook f. to Isozyme Analysis. The First Study of Genetics Variety) : Tri Suwarni Wahyudiningsih JHT, Admin
Jurnal Hutan Tropika Volume 9 Nomor 2 Tahun 2015
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v10i02.55

Abstract

ABSTRACT Jelutung rawa (Dyera lowii Hook f.) is the commercial and endemic species of peat-swamp forest with sensitive status, therefore the research to analyze its genetics variety is very important. The research was aimed to analyze the seven of enzyme in the leaf of D. lowii that well-marked by the emergence of polymorphic tape pattern consistently. The research was conducted at November to December 2012 in the tree improvement laboratory of Gadjah Mada University. Leaf of D. lowii samples were gotten from D. lowii plantation at the Cilik Riwut Street, nine km from Palangka Raya City. There are seven enzyme system to screening, namely Shikimate Dehydrogenase (SHD; EC 1.1.1.25), NAD(P)H-Diaphorase (DIA; EC 1.6.2.2), Glutamate Oxaloacetate Transaminase (GOT: EC 1.11.1.7), Acid Phosphatase (ACP; EC 3.1.3.2), 6-Phosphogluconate Dehydrogenase (6-PG; EC 1.1.1.44), Esterase (EST; EC 3.1.1), dan Peroxidase (POD; EC 1.11.1.7). Stages of research were preparation, leaf extraction, supernatant, electroforesis “Wendel & Weeden”, colouring, fixation, and gel dehydration. Isozyme was detected using Rf (Relative value from Bromophenol Blue) to make the zymogram. Polymorphic tape pattern consistently was resulted by enzymes of DIA, POD, ACP, EST, and GOT, whereas polymorphic tape pattern inconsistently was resulted by enzymes SHD and 6-PG. Furthermore, the polymorphic tape pattern consistently could to analyze genetics variety. The first study of genetics variety showed that there are four locus at the leaf of D.lowii, namely Est-1, Est-2, Est-3, and Got-1 in the 14 of alel. Keywords: Dyera lowii, enzyme, isozyme analysis, polymorphic
KAJIAN PULPING SODA BEBAHAN BAKU PELEPAH PISANG (Musa paradisiaca) (A Study on Pulping Chemical Methods Based of Banana Leaves (Musa paradisiaca): Miati1), Renhart Jemi 2) , Endra Cipta 3) JHT, Admin
Jurnal Hutan Tropika Volume 9 Nomor 2 Tahun 2015
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v10i02.56

Abstract

ABSTRACTStem of the banana bunch could to be used as basic material to the making of pulp in order to substitute the basic material of wood. This research was aimed to know the cooker solution concentration of NaOH to produce the best pulp rendement. The research using soda process with NaOH as the cooker solution in the three variation of concentration, i.e. 5%, 10%, and 15%. Research result showed that NaOH with concentration of 5% produce the best pulp rendement, namely 85.58%, they were comprised 39.98% of pulp rendement filtrate and 44.6% of uncooked rendement. Keywords: Concentration of NaOH, pulping soda, stem of banana
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