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PEMANFAATAN SERBUK KAYU JATI (Tectona grandis L.) YANG DIRENDAM DALAM AIR DINGIN SEBAGAI MEDIA TUMBUH JAMUR TIRAM (Pleurotus comunicipae)
Get PDFoai:ojs.unhas:article/146The growth responds of Pleurotus comunicipae to the use of cold water-soaked teakwood sawdust as a growth medium was investigated. Teakwood sawdust was soaked in cold water during the time periods of 1, 3, 5 and 7 days) with ten replications. Unsoaked teakwood sawdust was also prepared and used as a control. Measurement variabels consisted of time required for a completely covering mycelial growth, number of fruitbody, and fungal mass (green and dry weight). Results showed that P. comunicipae placed on soaked teakwood sawdust medium had a better growth than control (without soaking) medium. The medium with increased soaking period produced a good growth ability of P.comunicipae. At teakwood sawdust soaked for 7 days, the average of mycelial growth to cover teakwood sawdust medium, number of fruiting bodies, green weight and dry weight at the first harvesting were 52.6 days, 8.6 units, 100.5 grams and 13.4 grams, respectively.
Keywords: teakwoods sawdust, Pleurotus comunicipae, cold water soaking, growth abilit
KUALITAS PAPAN KOMPOSIT YANG TERBUAT DARI LIMBAH KAYU SENGON DAN KARTON DAUR ULANG
Get PDFThe use of recycled carton as an alternative material for the layer of composite board may increase the board strength properties. The objective of this research was to find out the influence of face and back layer types on the quality of produced boards. Materials used in this study were wafer made from sengon wood (Paraserianthes falcataria L. Nielsen), water based polymer isocyanate adhesive, and several kinds of cartons such as duplex carton, recycled carton, and waste of corrugated board. The composite board was produced with the target density of 0.65 g/cm3 and the resin solid content of 6% based on oven dry weight of particle, face and back layers. The results are as follows : 1) Utilization of carton layers improved the dimensional stability and bending strength of board; 2) Composite board with recycled carton layer fullfilled the Japanese Industrial Standard (JIS) A-5908-1994 for wafer board type in terms of density, water content, and modulus of rupture (MOR) in lengthwise and widhtwise of board but, did not fullfill that for veneered particled board type; 3) The presence of those layer material types decreased internal bond of the board.
Keywords : composite board, face and back layer types, recyled carto
SIFAT FISIK BATANG DAN CABANG KAYU MAKADAMIA
Get PDFSince there have been a big difference between wood production and industrial need, wood diversification plays an important role in handling wood deficiencies. Wood raw material diversification could developed and increased throughout the use of whole parts of the tree including branch. The current study was aimed at understanding stem and branch physical properties (basic density, air-dry specific gravity, air-dry moisture content and shrinkage) of macadamia wood as quality indicators for efficient utilization in the future. For the purpose of the study, parts of stem and branch of the tree were taken from a macadamia tree. Test specimens of stem were cut 50 cm from the ground while that of branch were selected from the largest diameter at 10 cm distance from the main stem of the tree. All samples were tested for their physical properties according to ISO standards, 1975. Results showed that the basic density, air dry specific gravity and longitudinal shrinkage of the branchwood of macadamia were higher than those of the stem. The air-dry moisture content, radial and tangential shrinkage were low on the branchwood.
Keywords : Wood Physical Properties, Branchwood , Macadamia Woo
CHALLENGES FOR CONSERVATION OF SULAWESI CRESTED BLACK MACAQUE (Macaca nigra)
Get PDFMacaca nigra (kera jambul hitam) adalah salah satu satwa endemik di Pulau Sulawesi yang populasinya di alam semakin berkurang. Menurunnya populasi satwa ini utamanya disebabkan oleh meningkatnya populasi penduduk yang secara tidak langsung mempengaruhi tingkat perburuan satwa ini, yang umumnya dikonsumsi sebagai makanan tradisional masyarakat setempat. Perburuan ini dilakukan semata-mata hanya untuk tujuan komersial. Akses jalan Trans-Sulawesi yang semakin baik juga telah membuka peluang yang lebih besar bagi para pemburu dan pedagang dalam melakukan perdagangan satwa liar. Selain itu, status kawasan, lemahnya penegakan hukum, minimnya sumberdaya manusia pengelola kawasan, dan lemahnya manajemen kawasan serta aktivitas wisata yang tidak bertanggung jawab juga turut berperan dalam menurunnya populasi kera jambul hitam. Tulisan ini mencoba untuk mengetengahkan isu-isu yang mempengaruhi populasi M. nigra di alam dan mengidentifikasi tantangan-tantangan yang harus dihadapi dalam konservasi satwa ini. Rekomendasi untuk mempertahankan populasi dan melestarikan satwa ini juga dibahas dalam tulisan ini.
Key words: wild meat, wildlife trade, wildlife tourism, north sulawesi
Reference
SIMULASI PEMANFAATAN LAHAN BERDASARKAN PENDUGAAN EROSI TANAH: STUDI KASUS SUB DAS MOWEWE DI DAS KONAWEHA SULAWESI TENGGARA
Get PDFSub watershed of Mowewe has been considered as important regions in South East Sulawesi because it takes a great responsibility as a water supplier in Konaweha watershed. Konaweha watershed is a source of irrigation and domestic water for Kolaka Regency, Konawe Regency, South Konawe Regency and Kendari Municipality which have been recently in a critical condition. For this reason, it should be well managed. This study was implemented with the aim of establishing model of land use in Mowewe sub watershed that can preserve the land and water resources. The method employs a system analysis with simulation technique by using the Universal Soil Loss Equation (USLE) model based on Geographical Information Systems (GIS). The result of the research revealed that the predicting soil erosion is 68,58 ton/ha/year, more than the Tolerable Soil Loss (TSL) value of 21,52 ton/ha/year. Therefore, restructuring of land use pattern should be done to improve the condition of the area to achieve a sustainability.
Keywords : Watershed, land use, soil erosion, GI
DISPERSAL PATTERN OF JUVENILES OF EMERGENT, CANOPY AND SHADE-TOLERANT TREE SPECIES ON FLOOD-PLANE FOREST AREA AT BERAU, EAST KALIMANTAN
Get PDFPola penyebaran anakan jenis pohon emergent (Shorea sp.), kanopi (Maduca malaccensis) dan toleran naungan (Aglaia tomentosa) telah diamati pada hutan dataran rendah luapan banjir di Berau, Kalimantan Timur. Hasil penelitian menunjukkan bahwa, penyebaran anakan ketiga jenis pohon tersebut sangat dipengaruhi oleh agen dispersal buah. Anakan Shorea sp., yang mana memiliki buah tipe samara, sebagian besar tersebar pada bagian Utara-Barat pohon induknya, mengikuti arah angin yang menerbangkan buahnya. Anakan dua jenis lainnya, yang mana buahnya yang bertipe berry sangat disukai oleh binatang mamalia, menyebar secara lebih merata. Struktur populasi anakan ketiga jenis tersebut menunjukkan kecenderungan yang berbeda. Shorea sp. menunjukkan struktur populasi berbentuk huruf J terbalik yang sangat tajam, sedangkan struktur populasi anakan dua jenis lainnya cenderung berbentuk garis horizontal. Perbedaan struktur populasi tersebut terkait dengan toleransi jenis-jenis tersebut terhadap naungan. Buah Shorea sp. yang jumlahnya melimpah segera berkecambah setelah jatuh, namun pertumbuhan anakan selanjutnya tertahan oleh naungan kanopy hutan yang sangat rapat.
Key words : Dispersal, Juvenil, Emergent, Canopy, Shade-toleran
KARAKTERISTIK ANATOMI, FISIK MEKANIK, PENGERINGAN DAN KETERAWETAN KAYU KEMIRI (Aleurites moluccana Willd.)
Get PDFThe aim of this research was to determine the anatomy, physical and mechanical properties, drying characteristics and treatability of kemiri wood. The observed paramaters were macroscophic and microscophic characteritics, moisture content, specific grafity, shrinkage, strength properties, drying quality, and the retention and penetration of wood preservative. Tests were run according to IAWA List, SNI and JIS. The heartwood colour is white to yellowish white and it is not clearly demarcated to the sapwood. Wood texture is rather coarse, stright grain, rather rough and rather glossy surface. The vessels are oval, diffuse porous, simple perforation plates. Parenchyma type is incomplete borders to the vessels and short tangential lines. Rays heterocellular are uniseriate and biseriate. Its fiber length is medium long size. Kemiri wood is classifed to strength class IV-III. Retention and penetration of wood preservative after 5 days in cold water treatment was met to SNI standard. The air drying test indicated the need of 8 days to achieve of the moisture content 12,29%. Wood defects due to the air drying test can be occured in the forms of check, bowing, discolouration and blue stain.
Keywords: Wood anatomy, physical, mechanical, drying, treatability, Aleurites mollucana
Reference
SIFAT FISIK DAN MEKANIK KOMPOSIT KAYU SEMEN-SERBUK GERGAJI
Get PDFThis research aims to find out the effect of cement-saw dust ratio levels on the physical and mechanical properties of produced composites. The physical properties (density, water content, water absorption after the immersion of one hour and 24 hours, and thickness swelling after the immersion of one hour and 24 hours) and mechanical properties (MOE and MOR) were observed according to ISO standards. The results showed that the use of the cement to sawdust ratio of 3 : 1 in producing wood composite with the target density of 1200 kg/m3 resulted in the lowest water absorption and the highest MOE and MOR. The swelling value and MOR of the produced boards were not acceptable, but their water content, water absorption, and MOE parameters were acceptable according to ISO 8335 1997.
Key Words : Physical and mechanical properties, cement wood composite, sawdus
UJI EFEKTIVITAS EMPAT VARIASI PROPOLIS TRAP TERHADAP PRODUKSI PROPOLIS LEBAH MADU Apis mellifera L.
Get PDFThe propolis produced by honeybees as it is used a material for cosmetic and health industry fiberglass-constructed has high economy value. However, the effective methode for the propolis production has not been found. The objective of this research was to find out the effectiveness of four propolis traps variations on the propolis production of Apis mellifera honeybees. Materials used in this research were sixteen colony of Apis mellifera honeybees and propolis traps. The propolis production and the formed surface area on traps were collected from four trap treatments with four replications. The obtained data were analyzed by using Completely Random Design Analysis and Tukey Test. The most effective of propolis traps was that made of fiberglasses with hole direction same as frame direction (the average production of 2.03 g). The largest of propolis surface area was produced by propolis trap with hole direction same as frame direction (28.29 cm2). No corellation between the large of propolis survace (cm2) and propolis production (g) was observed.
Keywords: honeybees, propolis traps, propolis production
POTENSI DAN PERMUDAAN TEGAKAN ALAM EBONI (Diospyros celebica Bakh.) DI AREAL HPH PT. INHUTANI I MAMUJU
Get PDFThe intensive use of Eboni has caused a decrease of its natural population which has also contributed to the future loss of genetic potencies. Preservation efforts could only be conducted if the actual potencies of the stand and its environmental conditions were recognized. A study on stand and regeneration potencies as well as its soil characteristics is needed as a basic in management aplication for the increase of genetic potencies. This study used a systematic sampling survey method and laboratory analysis. The study aims to identify tree potencies and regeneration of Eboni Makassar as well as its soil characteristics under the stand. The results are expected to provide a description on Eboni Makassar potencies and its management efforts. It was found from the study that the potency of Eboni was 5.013 m3/ha with minimum and maximum estimated volumes of 3.163 m3/ha and 6.863 m3/ha, respectively. Eboni was naturally regenerated better in >40% slope category.
Keywords: Eboni, Potencies and Regeneration, Various Slop