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Gorontalo Journal of Forestry Research
Published by Universitas Gorontalo
ISSN : 26142058     EISSN : 2614204X     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Gorontalo Journal of Forestry Research (GJFR) is a media publication for academics, researchers and practitioners to publish the results of research or scientific articles. GJFR is published 2 (two) periods each year, ie every April and October.
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Articles 5 Documents
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Search results for , issue "VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH" : 5 Documents clear
POTENCY OF CARBON STORAGE AND CO2 ABSORPTION AT PT TIRTA INVESTAMA, SUBANG DISTRICT Widia Sri Utami; Rany Juliani; Zaenal Abidin; Sidik Santoso; Apriliyanti Dwi Rahayu; Nida Ankhoviyya
Gorontalo Journal of Forestry Research VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v7i1.3352

Abstract

The Biodiversity Park covering an area of ±5,800 Ha provides conservation functions in the work area of PT Tirta Investama Plant Subang and for the surrounding community which has a sloping to very steep topography. A landslide disaster occurred in the company's work area in Block II at the beginning of 2024 due to increased rainfall of 17.6 mm/hour caused by global warming. Biodiversity Park also provides the function of reducing greenhouse gas emissions by storing and absorbing CO2 by plants in the area to reduce global warming through photosynthetic activity assisted by energy from sunlight. The research method is to carry out a census inventory of mahogany plants in Block II. This research aims to determine carbon storage and CO2 uptake in mahogany plants. The research show that 412 mahogany plants can store 26,364 tonnes/ha of carbon in their stems or equivalent to an equivalent CO2 uptake of 96,755 tonnes/ha.
OPTIMASI BIAYA PRODUKSI DALAM INDUSTRI PENGOLAHAN KAYU (Studi Kasus Usaha Jepara Meubel Kayu Jati Majene) Fitri Indhasari; Muhammad Agusfartham Ramli
Gorontalo Journal of Forestry Research VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v7i1.3300

Abstract

Penelitian ini bertujuan untuk menentukan kombinasi produksi optimum dengan memperhatikan keterbatasan sumberdaya sehingga diperoleh keuntungan Usaha Jepara Meubel yang maksimum di Lingkungan Labuang Kecamatan Banggae Timur Kabuptaen Majene Sulawesi Barat. Analisisdata yang dilakukan adalah analisis biaya produksi untuk setiap jenis produk kayu jati dan analisis optimum produk. Hasil penelitian menunjukkan bahwa biaya produksi setiap meter kubik produk besarnya bervariasi antara Rp.105.000 hingga Rp.2.045.000 per meter kubik produk. Solusi optimum menunjukkan bahwa dari 20 produk kayu jati yang dianalisa, ada 3 produk utama yang dihasilkan yaitu produk X9, X13 dan X16, sementara produk yang lain yang diproduksi pada tingkat minimum. Jumlah produksi optimum adalah 10.169,81 m3 per bulan lebih tinggi dibandingkan jumlah produksi pada kondisi aktual. Pada kondisi optimum keuntungan Usaha Jepara Meubel per bulan meningkat.
APPLIKASI BIOCHAR BERBAHAN DASAR LIMBAH KAYU MERANTI (Shorea spp.) UNTUK PERTUMBUHAN MAHONI (Swietenia macrophylla) MENGGUNAKAN MEDIA TAILING EMAS MERANTI (Shorea spp.) BIOCHAR APPLICATION TO MAHONI (Swietenia macrophylla) GROWTH IN GOLD TAILING MEDIA Qori Maulani; Melya Riniarti; Duryat Duryat; Wahyu Hidayat
Gorontalo Journal of Forestry Research VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v7i1.3331

Abstract

ABSTRACTTailings are the final result of mining industry activities. Tailings are in the form of sludge waste produced from mining gold, copper, silver and other minerals. Tailings can potentially damage the environment and be dangerous to human life and other creatures. One effort to restore land from tailings is bioremediation technology. Biochar is a soil amendment material that can be used for environmental remediation. Utilizing meranti wood waste as biochar can reduce waste and increase economic value. Mahogany is a type of plant that is known to have potential as a phytoremediation plant. The aim of this research is to determine the effectiveness of meranti wood biochar to improve the growth of mahogany planted in gold tailings media. This research was carried out for four months in a greenhouse. The research was designed using a Completely Randomized Design (CRD) with the treatment of gold tailings and meranti-based biochar in the growing media used. There were 12 treatments with four repetitions. The treatment given is (1) 0% tailings+0% Biochar; (2) 25% tailings+0% biochar; (3) 50% tailings +0% biochar; (4) 0% tailings+5% biochar; (5) 25% tailings + 5% biochar; (6) 50% tailings +5% biochar; (7) 0% tailings + 10% biochar; (8) 25% tailings + 10% biochar; (9) 50% tailings + 10% biochar; (10) 0% tailings + 15% biochar; (11) 25% tailings + 15% biochar; (12) 50% tailings + 15% biochar. The parameters observed were height increase, diameter increase, leaf area and root length. The research results showed that the application of biochar was able to improve the growth of mahogany planted in gold tailings media. Providing 10 and 15% biochar on media with gold tailings even resulted in better mahogany growth compared to those grown on media without tailings. This shows that meranti-based biochar has the ability to become a soil amendment for land contaminated with gold tailings.ABSTRAKTailing merupakan hasil akhir dari kegiatan industri pertambangan. Tailing berbentuk limbah lumpur yang dihasilkan dari pertambangan emas, tembaga, perak maupun mineral lainnya. Tailing dapat berpotensi merusak lingkungan dan berbahaya bagi kehidupan manusia dan makhluk lainnya. Salah satu upaya restorasi lahan dari tailing adalah dengan teknologi bioremediasi. Biochar adalah salah satu bahan pembenah tanah yang dapat digunakan untuk remediasi lingkungan. Pemanfaatan limbah kayu meranti sebagai biochar dapat mengurangi limbah dan meningkatkan nilai ekonomi. Mahoni termasuk tipe tanaman yang diketahui memiliki potensi sebagai tanaman fitoremediasi. Tujuan dari penelitian ini adalah mendapatkan efektifitas biochar kayu meranti untuk memperbaiki pertumbuhan mahoni yang ditanam pada media tailing emas. Penelitian ini dilaksanakan selama empat bulan di rsumah kaca. Penelitian didesign dengan Rancangan Acak Lengkap (RAL) dengan perlakuan pemberian tailing emas dan biochar berbahan dasar meranti pada media tumbuh yang digunakan.  Ada 12 perlakuan dengan ulangan sebanyak empat kali.   Perlakuan yang diberikan adalah (1) 0% tailing+0% Biochar; (2) 25% tailing+0% biochar; (3) 50% tailing +0% biochar; (4) 0% tailing+5% biochar; (5) 25% tailing + 5% biochar; (6) 50% tailing +5% biochar; (7) 0% tailing + 10% biochar; (8) 25% tailing + 10% biochar; (9) 50% tailing + 10% biochar; (10) 0% tailing + 15% biochar; (11) 25% tailing + 15% biochar; (12) 50% tailing + 15% biochar.  Parameter yang diamati adalah pertambahan tinggi, pertambahan diameter, luas daun dan panjang akar.  Hasil penelitian menunjukkan bahwa pemberian biochar mampu memperbaiki pertumbuhan mahoni yang ditanam pada media tailing emas.  Pemberian biochar 10 dan 15% pada media dengan tailing emas bahkan menghasilkan pertumbuhan mahoni yang lebih baik dibandingkan dengan yang ditanam pada media tanpa tailing. Hal ini menunjukkan bahwa biochar berbahan dasar meranti memiliki kemampuan untuk menjadi bahan pembenah tanah bagi lahan lahan tercemar tailing emas.  
THE IMPACT OF MINING EXCAVATIONS (VOIDS) ON THE WATER QUALITY MANAGEMENT IN THE NORTH KALIMANTAN PROVINCE Sandy Ardian; Marlon Ivanhoe Aipassa; Reva Oktaviani; Ndan Imang; Shalaho Dina Devy; Heru Ivanhoe Susilo; Rochadi Kristiningrum Kristiningrum; Edy Kristiningrum Sarwono; Dawamul Ivanhoe Arifin
Gorontalo Journal of Forestry Research VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v7i1.3304

Abstract

The presence of a coal mining business permit not only has an economic impact but can also cause environmental problems. The objectives of this research are (1) to analyze the impact of PT XXX's overflowing voids on water management and water quality, and (2) to carry out spatial analysis, mapping and estimation of coal reserves that cannot be extracted by PT YYY. The research method is a case study selected by purposive sampling at two companies in North Kalimantan Province using water quality test analysis with grab sampling and estimating the potential loss of coal reserves using the rule of gradual changes and rule of nearest point methods as well as aerial photography. The research results show that in general the water use meets Class 3, namely: Water that can be used for cultivating freshwater fish, animal husbandry, water for irrigating crops, and/or other uses that require the same water quality as that use. Apart from that, PT XXX has built an overflow water channel into the PT YYY area without management approval, thus having a negative impact on PT YYY's mining plans which are dominated by peat land. Map of PT YYY's lost coal potential of 714,688 MT with an affected area of 15.16 hectares with details of 6.4 ha being the void area included in PT YYY's IUP area, 1.86 ha being the road and buffer zone area and 6.9 ha is a potential lost area of PT YYY.
MODEL ALOMETRIK PENDUGA ABOVEGROUND BIOMASS Gigantochloa atter DI DESA ALU, KABUPATEN POLEWALI MANDAR Daud Irundu; Rahmania HM; Wahyudi Wahyudi; Ritabulan Ritabulan; Mila Alviani
Gorontalo Journal of Forestry Research VOLUME 7 NOMOR 1 TAHUN 2024 GORONTALO JOURNAL OF FORESTRY RESEARCH
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gjfr.v7i1.3362

Abstract

Biomass allometric models are needed to determine the carbon content absorbed by bamboo plants. There are still many bamboo plants that do not have a local allometric model to estimate their biomass, one of which is Gigantochloa atter bamboo. This research aims to produce an allometric model for estimating the biomass of Gigantochloa atter bamboo found in Alu Village, Polewali Mandar Regency, West Sulawesi Province. Dustructive sampling method of 30 bamboo plants, to obtain wet weight and water content, starting with measuring the diameter and total height. Water content to determine biomass. Biomass, diameter and height values were analyzed by regression to develop allometric models according to predetermined equations. Substitution of measurement values into the allometric equation and data analysis using the coefficient of determination (R2), bias, error index and Mean Square Error Prediction variable scoring method. The scoring results of six models for estimating the biomass of Gigantochloa atter bamboo plants in Alu Village, Polewali Mandar Regency were selected as the best model Y = 0.785+0.011(D2H) with the highest score values including R2 value (0.982), Bias value (0.124), IE value (25.086) and MSEP (1.435).

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