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All Journal Jurnal Ilmu Lingkungan Indonesian Journal of Forestry Research Jurnal Penelitian Hutan dan Konservasi Alam Jurnal Penelitian Hasil Hutan Jurnal Sains Dan Teknologi Lingkungan Jurnal Penelitian Hasil Hutan
Sona Suhartana
Pusat Penelitian dan Pengembangan Keteknikan Kehutanan dan Pengolahan Hasil Hutan JL. Gunung Batu No. 5 Bogor, 16610
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LOWEST POSSIBLE FELLING TECHNIQUE FOR INCREASING UTILIZATION OF RENGHAS (Gluta renghas L.) WOOD AT A PEAT SWAMP FOREST Suhartana, Sona; Yuniawati, Yuniawati
Indonesian Journal of Forestry Research Vol 3, No 2 (2006): 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.2006.3.2.105-113

Abstract

This study was carried out in 2005 at a peat swamp forest company in Jambi. The aim of this study was to find out a technique to increase the utilization of renghas wood in a peat swamp forest by implementing the lowest possible felling technique (LPFT) and  the conventional felling technique (CFT). Data collected in this study were: working time, log volume, waste volume, productivity, efficiency, stump height and felling cost. Two data categories were analyzed with respect to their possible differences by using a t-test.The study showed that the implementation of LPFT produced better results compared to that of CFT which was indicated by: (1) Felling productivity increased to 5.220 m3/hour, (2) Felling cost decreased Rp 341/m3, (3) Felling efficiency increased 3.2%, and (4) The average stump heights were 41.2 cm for LPFT and 67.5 cm for CFT.
ANALYSIS OF USING EFFICIENT LOGGING TOOLS AT PT. PURWA PERMAI IN CENTRAL KALIMANTAN Suhartana, Sona; Yuniawati, Yuniawati
Indonesian Journal of Forestry Research Vol 5, No 1 (2008): 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.2008.5.1.53-64

Abstract

A high log demand that often exceeds its supply capability should be overcome by using appropriate logging  tools. Numerous  kinds and types of logging  tools require  a well planning in their utilization. Number of tools which are greater or fewer than what is actually needed can be disadvantageous  for a company. In relevant to these aspects, a study was carried out at a timber estate in Central Kalimantan  in 2007. The aim of the study was to find out an efficient number  of tools used for logging  in a timber  estate. The analysis was based on the target and realization of the company’s log production. The result revealed that: (1) Optimum number of logging tools depended on production target,  i.e. 41 units  of chainsaws  for felling,  42 units  of farm tractors  for skidding,  9 units of loaders for loading and unloading, and 36 units of trucks for transportation; (2) Number  of logging tools as obtained from all activities  in the field was fewer than that from  the analysis based on production target and realization. This condition  indicated that number of logging tools used in the company was not yet efficient.
MINIMIZING RESIDUAL STAND DAMAGE AND FELLING COST USING LOWEST POSSIBLE FELLING TECHNIQUE (A case study in one logging company in West Kalimantan) Suhartana, Sona; Krisdianto, Krisdianto
Indonesian Journal of Forestry Research Vol 2, No 1 (2005): 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.2005.2.1.1-11

Abstract

The implementation of felling technique in logging companies is not yet carried out efficiently and appropriately. Study on the lowest possible felling technique (LPFf) is considered  to be important to  reduce residual  stand damage and felling cost. This study was carried out in a logging company in West Kalimantan in 2004. The aim of this study was to  determine the effect of LPFT on residual stand damage and felling cost. Data collected in this research include: residual stand damage, working time, timber  volume, productivity,  efficiency,  stump   height  and  felling cost.  Two categories  data were analyzed with  respect  to  their  possible  differences  using  T-test.    The  result  showed  that  the implementation   of  LPFT  was more advantage impact compared  to   that of  conventional felling technique, which is  indicated by the following factors:  (1)  Trees damage decreased 2.96%;  (2) Poles damage decreased 4.75%;  (3) Felling productivity decreased 17.16%; (4) Felling efficiency  increased approximately  3.2%;  (5) Felling cost increased about Rp 327.07 /  m; and (6) in average stump height was 40.60 cm lower.
BIOMASA HUTAN RAWA GAMBUT TROPIKA PADA BERBAGAI KONDISI PENUTUPAN LAHAN Jaya, Adi; Siregar, Ulfah J.; Daryono, Herman; Suhartana, Sona
Jurnal Penelitian Hutan dan Konservasi Alam Vol 4, No 4 (2007): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRAK Lahan gambut tropika memiliki fungsi sangat penting yang terkait dengan masalah konservasi, terutama fungsi simpanan dan rosot karbon, yang mempengaruhi perubahan iklim global. Namun, lahan gambut mengalami berbagai  tekanan  dari  penggunaan lahan  yang  beragam termasuk pembangunan kehutanan, drainase  pertanian,  energi,  dan  hortikultura.  Tujuan  penelitian  ini  yaitu  untuk  mendapatkan  informasi biomasa hutan gawa gambut tropika terutama di Kalimantan Tengah pada berbagai kondisi penutupan lahan. Penelitian pada biomasa rawa gambut dilaksanakan pada beberapa jenis penutupan lahan yaitu hutan rawa gambut primer, hutan bekas tebangan, dan kawasan bekas terbakar. Metode destruktif diterapkan pada tiga petakan berukuran 10 x 10 m2. Contoh masing-masing bagian vegetasi seperti batang, cabang, ranting, dan daun diambil untuk analisis kadar air. Hasil penelitian menunjukkan bahwa ada suatu perbedaan biomasa di atas permukaan tanah yang nyata antara hutan rawa gambut yang relatif masih baik, hutan bekas tebangan, dan kawasan terbakar. Rata-rata jumlah biomasa adalah antara 400-900 ton/ha untuk hutan rawa gambut yang relatif masih baik, 240-400 ton/ha untuk hutan bekas tebangan,  210-460 ton/ha untuk kawasan bekas kebakaran tahun 1997, dan antara 15 hingga 21 ton/ha untuk kawasan yang dua kali mengalami kebakaran.
STUDI KOMPARASI APLIKASI PENEBANGAN RAMAH LINGKUNGAN DI RIAU DAN JAMBI Suhartana, Sona; Yuniawati, Yuniawati
Jurnal Penelitian Hasil Hutan Vol 28, No 2 (2010): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2717.259 KB) | DOI: 10.20886/jphh.2010.28.2.119-129

Abstract

Teknik penebangan ramah lingkungan (RIL) ditengarai dapat meningkatkan produktivitas dan menekan biaya produksi. Penelitian dilaksanakan pada tahun 2009 di dua perusahaan hutan di Riau dan Jambi, yang bertujuan untuk mengetahui pengaruh penerapan teknik penebangan RIL terhadap produktivitas, biaya produksi dan efisiensi pemanfaatan kayu. Data yang dikumpulkan berupa volume kayu, waktu tebang dan biaya yang dikeluarkan dari teknik penebangan RIL dan teknik setempat dengan ulangan masing-masing 15 pohon. Analisis data dilakukan dengan uji-t. Hasil penelitian menunjukkan bahwa penerapan teknik penebangan RIL di hutan tanaman rawa gambut dapat: 1) meningkatkan produktivitas sebesar 0,328 m3/jam (Riau) dan 0,982 m3/jam (Jambi); 2) menekan biaya produksi sebesar Rp 1.767,1,-/m3(Jambi) dan Rp 518,6,-/m3(Riau); 3) meningkatkan efisiensi pemanfaatan kayu sebesar 7,9% yang setara dengan Rp 25.438.000.000,-/tahun (Jambi) dan 5,6% yang setara dengan Rp 15.680.000.000,-/th (Riau). Berdasarkan ketiga aspek ini, ternyata aplikasi RIL di Jambi lebih baik dari pada di Riau.
THE EFFECTS OF CONTROLLED SKIDDING TECHNIQUE ON RESIDUAL STAND DAMAGE AND GROUND EXPOSURE IN SWAMP FOREST LOGGING Suhartana, Sona
Indonesian Journal of Forestry Research Vol 1, No 1 (2004): 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.2004.1.1.1-6

Abstract

The  case study was  carried  out at a swamp forest company  in Riau in 2001.   The  aim of the study  was to determine  the effect of controlled skidding technique  to residual  stand damage and ground  exposure. Data  collected  includes:  felled trees, poles,   trees with  the diameter 20 cm up, damaged poles, damaged  trees and ground  exposure.  The data was  analyzed with t-test.  The study showed  the following results:The  average of  residual stand  damage caused by controlled  skidding technique  was  29.05% for poles and 19.8%  for trees. The average of residual stand damage caused by conventional skidding technique  was 34.2% for poles and  24.9%   for trees.  The difference  of  5.1%   (poles) and 5.1 % (trees) were significant  at 95%.The  average of ground  exposure  caused by controlled  skidding  technique  and conventionalskidding technique was respectively   16.06% and 18.4%.  The difference of 2.34%  was significant at 95%.
PENINGKATAN PRODUKTIVITAS PEMANENAN KAYU MELALUI TEKNIK PEMANENAN KAYU RAMAH LINGKUNGAN: KASUS DI SATU PERUSAHAAN HUTAN RAWA GAMBUT DI KALIMANTAN BARAT Suhartana, Sona; Yuniawati, Yuniawati
Jurnal Penelitian Hasil Hutan Vol 29, No 4 (2011): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jphh.2011.29.4.369-384

Abstract

Penerapan teknik pemanenan yang ramah lingkungan (RIL) di lahan gambut diharapkan dapat mencapai hasil optimal dan lestari. Penelitian dilaksanakan di PT. Kalimantan Subur Permai, Kalimantan Barat pada bulan Juli - Oktober 2010. Areal ini merupakan hutan alam rawa gambut untuk pembukaan lahan HTI (tebang pemanfaatan penyiapan lahan) dengan jenis kayu merupakan rimba campuran (tebang pemanfaatan penyiapan lahan). Tujuan penelitian ini adalah untuk mengetahui besarnya peningkatan produktivitas, penurunan biaya produksi, subsidensi dan fluktuasi tinggi muka air dari penerapan teknik pemanenan RIL di hutan rawa gambut. Hasil penelitian menunjukkan bahwa apabila RIL diterapkan pada kegiatan penebangan, penyaradan, muat-bongkar dan pengangkutan, 1.Dapat meningkatkan produktivitas masing-masing sebesar 0,946 m /jam, 2,449 m /jam, 1,96 m /jam, 1,871 m /jam, dan 2,158 m /jam; 2. Dapat mengurangi biaya produksi masing-masing sebesar Rp 992,1/m , Rp 3.088,6/m , Rp 127,9/m , Rp 99,7/m , dan Rp 158,6/m .km; 3. Apabila menerapkan teknik RIL dapat meningkatkan efisiensi pemanfaatan kayu sebesar 6% yang setara dengan tambahan keuntungan Rp 74.400.000/tahun. Dengan demikian terbuka peluang bagi perusahaan untuk serius menerapkan teknik penebangan RIL; 4. Rata-rata subsidensi adalah 0,375 cm/tahun lebih kecil daripada PP Nomor 150 Tahun 2000; dan 5. Rata-rata tinggi muka air di petak tebang dan di kanal adalah 61,75 cm dan 52,25 cm.
MONITORING A CONDITION OF RECOVERY OF RESIDUAL STAND AND LOGGED OVER AREA AFTER 5 YEARS RIL IMPLEMENTATION: A CASE STUDY AT A FOREST COMPANY IN CENTRAL KALIMANTAN Sukanda, Sukanda; Yuniawati, Yuniawati; Suhartana, Sona
Indonesian Journal of Forestry Research Vol 4, No 1 (2007): 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.2007.4.1.45-51

Abstract

The aim of this study were to identify and evaluate a condition in logged over area (LOA) after 5 years of reduced impact logging (RIL) implementation, and to asses how far recovery of former skidding road, damages in felled and yarded over area, and environmental condition had taken place. Results of this study was expected to provide inputs and to improve the RIL implementation guidance for sending   sustainable forest management. The results revealed that: (1)The covers of skidding road reached consecutively 2,641 m2  area (in block I), and 3,147 m2  area (in block II), as both marked by the growing of  bushes with coverage portions i.e. 84% and 80%, respectively; (2) The bush that grew on the former skidding road was regarded as pioneer vegetation; (3) The effect of cross drain on skidding road after logging was able to decrease erosion, and increase the recovery of the road condition; and (4) The healthy residual stand after 5 years logging by RIL showed that small diameter felled trees have resulted bigger residual stand damaged then big diameter or the percentage of healthy trees would be small.
TWO FELLING TECHNIQUES AND FELLER POSTURES FOR INCREASING THE UTILIZATION OF GMELINA WOOD (A case study at two timber estates in East Kalimantan) Suhartana, Sona; Yuniawati, Yuniawati
Indonesian Journal of Forestry Research Vol 3, No 1 (2006): 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.2006.3.1.31-40

Abstract

Fellingis an early step in timber utilization process. Efficiencyand effectivity of felling technique, tool type and feller posture will affect the whole timber utilization efficiency. This study was carried out at two timber estates in East Kalimantan and intended to see the effect of two felling techniques and feller postures on felling productivity, fellingcost, as well as timber utilization efficiency.Primary  data collected in this research  included :  felling time, volume  of  felled timber, productivity, felling efficiency, stump height and felling cost. The data was analyzed using split-plot design with factorial pattern.The result showed that the implementation of lowest possible felling technique (LPFI) increased log production from 14.4  to 17.7%. The lowest stump height left was of  the one using LPFf  with particular bowed posture in PT. Sumalindo Lestari Jaya I (SLJ I) (4.82 cm).
TINGKAT PEMAHAMAN KESELAMATAN DAN KESEHATAN KERJA PADA KEGIATAN PEMANENAN KAYU JATI DI KPH CIANJUR Suhartana, Sona; Yuniawati, Yuniawati
Jurnal Penelitian Hasil Hutan Vol 29, No 1 (2011): Jurnal Penelitian Hasil Hutan
Publisher : Pusat Penelitian dan Pengembangan Hasil Hutan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2284.962 KB) | DOI: 10.20886/jphh.2011.29.1.46-56

Abstract

Pemanenan kayu merupakan pekerjaan yang beresiko kecelakaan kerja tinggi. Kondisi areal hutan yang sulit, ketidakseimbangan antara alat yang digunakan dengan kondisi lapangan dan keterampilan pekerja dapat menyebabkan kecelakaan kerja. Penelitian dilaksanakan di KPH Cianjur, Perum Perhutani Unit III Jawa Barat pada bulan Oktober 2010. Tujuan penelitian adalah untuk mengetahui tingkat pemahaman pekerja pemanenan tentang Keselamatan dan Kesehatan Kerja (K3) di KPH Cianjur. Penelitian dilakukan melalui wawancara kepada sejumlah pekerja di lapangan. Hasil wawancara kemudian dianalisis menggunakan skala Likert. Hasil penelitian menunjukkan bahwa rata-rata pemahaman pekerja terhadap K3 di KPH Cianjur memiliki skor baik; Pemahaman pekerja terhadap K3 belum mendapat dukungan penyediaan kelengkapan pakaian kerja, jalan angkutan dan kondisi kendaraan angkut dari pihak perusahaan; dan Pemahaman terhadap K3 selayaknya tidak hanya ditujukan kepada pekerja tetapi juga kepada pihak perusahaan.
Co-Authors - Rahmat - Yuniawati Adi Jaya, Adi Dulsalam Dulsalam Herman Daryono Krisdianto Sugiyanto Maman Mansyur Idris Sukadaryati Sukadaryati Sukanda Sukanda, Sukanda Ulfah Juniarti Siregar Yunia Wati, Yunia Yuniawati Yuniawati Yuniwati Y