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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Jurnal Silvikultur Tropika (JST) MEDIA KONSERVASI Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Jurnal Penelitian Hutan dan Konservasi Alam Proceeding International Conference on Global Resource Conservation Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) BERITA BIOLOGI Jurnal Hutan dan Masyarakat Biosaintifika: Journal of Biology & Biology Education Jurnal Agrotek Lestari Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari JURNAL HUTAN TROPIS Jurnal Ilmu Kehutanan Jurnal Riset Multidisiplin Edukasi
Iwan Hilwan
Department Of Silviculture, Faculty Of Forestry, Bogor Agricultural University, Bogor, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Education Energy Environmental Science Health Professions Materials Science & Nanotechnology Social Sciences Other

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The Initial Study on Cocomulsa to Push Growth of Jati Seedling in Sukamakmur Village, Bogor Iwan Hilwan; Yuda Purnama
Jurnal Silvikultur Tropika Vol. 3 No. 2 (2012): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.3.2.%p

Abstract

Teak (Tectona grandis L.f.) is a tree species was almost cultivated for log produced in Java, Indonesia. The purpose this research was to identified the influence of cocomulsa application for growth of teak seedling on the field. Cocomulsa was made from coconut-fiber use latex glue. Cocomulsa can take hold of soil moisture and can defend the weeds movement. Treatments in this research that are using of stake, herbicide, and hoe. The results of this study that interaction from stake and hoe combinations was influenced significantly to growth of plant circumference and high. Based on normality test, that occur disseminating of high and circumference average value to following date normality line, in where average  of high and circumference significant toward growth of teak. The result of calculation from minitab software indicate that the growth ofe teak seedling was not significant. That is because of unless the time from this research, monitoring just done in 2 months. Whereas teak is slow growing species with level of growth is long enough, so the different from that treatments have not seen in clear. Visually, teak plants with cocomulsa was better growth than teak without cocomulsa. And nominally, cocomulsa research toward growth of teak have not seen significant because of unless time for response observation from teak plant. So, in cocomulsa influence research next time that have to use fast growing species and take long time for observation.
Species Composition and Stand Structure in Logged Over Area in Forest Concession of PT Salaki Summa Sejahtera, Province of West Sumatra Iwan Hilwan
Jurnal Silvikultur Tropika Vol. 3 No. 3 (2012): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.3.3.%p

Abstract

Production forest in Sumatra, Kalimantan, and other islands, are located in lowland tropical rain forest, where in this forest type were dominated by plant species of Dipterocarpaceae. Many tree per hectar was cut to produce major commercial timber.  This timber harvesting activity with selective cutting method (TPTI sylviculture system) can rise impact to species composition and stand structure in logged over area (LOA).  Because that condition, study on species composition and stand structure in primary forest or virgin forest and logged over area is very important to provide data and information for forest management. According vegetation analysis in 1 ha sample plot at virgin forest and logged over forest, species composition and stand structure in logged over area is not significantly different. This condition indicate that implemented of TPTI was not change to species composition and stand structure in logged over area. Species dominant and co-dominant at virgin forest and logged over forest are similar, which are species trees of Shorea (meranti) and Dipterocarpus (keruing). Stand structure at virgin forest and logged over forest are not different, they have J-reverse curve as characteristic of uneven-aged natural forest.
The Species Diversity of Ground Cover at Sengon Buto (Enterobilium cyclocarpum Griseb.) and Trembesi (Samanea saman Merr.) Plantation in PT Kitadin’s Post Mining Land, Embalut, Kutai Kartanagara, East Borneo Iwan Hilwan; Dadan Mulyana; Weda Gelar Pananjung
Jurnal Silvikultur Tropika Vol. 4 No. 1 (2013): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.4.1.%p

Abstract

Inappropriate mining activity can rise bad impacts on environment such as decreasing of soil productivity, soil compaction, erotion and sedimentation, soil movements, decreasing of flora and fauna biodiversity, and micro climate change. Base on Government Regulation (PP) No.18/2008, post-mine area have to reclamated with purpose to recovery and return to previous condition. The objectives of research are to determine species composition and species diversity of ground cover at post-mine revegetation area of PT. Kitadin Embalut, East Kalimantan.  The result showed that at the sengon buto (Enterolobium cyclocarpun) plantation was found 22 species in 13 families, while on trembesi (Samanea saman) plantation was found 17 species in 13 families. The species dominant at both plantation were Paspalum conjugatum and Solanum torvum. The species diversity level of ground cover is medium, and species richness level is low, that is richness index at sengon buto plantation 2,56 and trembesi plantation 1,96. Species evennes of ground cover at sengon buto and trembesi plantation are high level because both of them have value E>0,6I. Species composition of ground cover at sengon buto and trembesi plantation are similar with value of IS = 82.05%. The species diversity of ground cover can be affected by shading factor and physical or chemical soil properties. Species dominant of ground covers on both plantation such as Paspalum conjugatum and Solanum torvum,  are have high tolerance level on light and good adaptation in post-mine area.
Diversity of Mesofauna and Macrofauna of Soil at Tin Post-Mined Area in Belitung Residence, Province of Bangka-Belitung Iwan Hilwan; Eko Putranti Handayani
Jurnal Silvikultur Tropika Vol. 4 No. 1 (2013): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.4.1.%p

Abstract

The existence of mesofauna and macrofauna of soil depend on availability of energy and feed resources for sustainable their life, such as organic matter and biomass which is related with carbon cycle in the soil. Availability of energy and nutrient for soilfauna, could be growth and their activities will be in good perform and give positif impact to soil fertility. The obyective this study to identify species diversity of mesofauna and macrofauna of soil and to analyse environment factors which is influence on availability of mesofauna and macrofauna of soil at several ages tin post-mined area in Belitung Residence. The benefit this research to provide information and suggestion  to monitor diversity of mesofauna and macrofauna of soil at tin post-mined area and environmental changes in physical and chemical soil properties, with the result that can determine next treatments for reclamation activity in tin post-mined area. The result showed that the age of tin post-mined area is very important  factor to influence of species diversity level of mesofauna and macrofauna of soil. This factor is direct related with development of vegetation and dynamic of physical and chemical soil properties. Sample plot in Batu Itam village with vegetation like secondary forest have highest value of richness index and heteroginity index than sample plot in Aik Merbau village and Tanjung Pendam village which is vegetation as shrub.
Diversity and Ecological Role Bryophyte in Sesaot Forest, Lombok, West Nusa Tenggara Nuroh Bawaihaty; Istomo .; Iwan Hilwan
Jurnal Silvikultur Tropika Vol. 5 No. 1 (2014): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.5.1.%p

Abstract

Diversity of mosses in Sesaot forest, Lombok, West Nusa Tenggara has 22 spesies, 12 family, and 3 classes. Diversity of mosses is the most common in the primary forest are 18 spesies, in fruit forest there are 12 spesies. And in the secondary forest are 7 species, there are 4 species contained in 3 areas, namely thuidium sp., barbella sp., calymperes sp., and lejeunea sp. Kind of mosses that mostly found is lejeunea sp., family is lejeuneaceae and classes is hepatice. And kind of mosses that lessly found is taxithelium sp., family is sematophyllaceae, and classes is music. Calyptotherium sp., family is entodontaceae, and classes is music. Plagiochila sp., family is lophoziaceae, and classes is music, and bazzania sp., family is lepidoziaceae, and classes hepatice. The condition of forest affect to the growth of mosses and its ecological roles in forest ecosystem. The mosses includes in pioneer plants, it is evidenced by many mosses that grow on fallen trees.
Growth Evaluation of Some Dipterocarp Species in Revegetation Areas of PT. Kitadin, East Kalimantan Iwan Hilwan; Yadi Setiadi; Hendriyana Rachman
Jurnal Silvikultur Tropika Vol. 4 No. 2 (2013): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.4.2.%p

Abstract

The existence of dipterocarp species is very important especially in lowland tropical rain forest. Dipterocarp species has high economical and ecological values. Borneo is one of the region dipterocarp species. Logging has resulted in the decrease of dipterocarp species, moreover, mining industry has worsen this condition. According to IUCN (International Union for Conservation of Nature), that these kinds of plants have been categorized endangered. PT Kiadin in collaboration with Research Center of Dipterocarp Samarinda performed planting trials of various dipterocarp. The experiment was carried out in 2009 in the area of pre-conditioned post-mining area. The planting was done in five locations that had previously been planted with pioneer tree species in which each location had different types of shading. In order to know which dipterocarp species that is the most superior and in which locations these species existed, the growth of several types of dipterocarp in post-mining landscapes of PT. Kitadin was evaluated. This study aimed to identify which types of dipterocarp species that grew the best in various locations of revegetation of PT. Kitadin. Based on the research done, there was a tendency that five dipterocarp species grow well in the shade of waru. However, precentage of these five dipterocarp species life was mostly under the shade of trembesi. Parashorea smythiesii species had greater average height, diameter, and survival rates than those of other species. Thus, this species is a potential species that could be used too planting in the ex mine siter of PT. Kitadin.Key words: dipterocarp, growth evaluation, revegetation
The Physical and Cehmical Soil Properties on Heath Forest and Ex-Tin Mined Land in East Belitung District SIFAT FISIKA DAN KIMIA TANAH DI HUTAN KERANGAS DAN LAHAN PASCA TAMBANG TIMAH KABUPATEN BELITUNG TIMUR Dina Oktavia; Yadi Setiadi; Iwan Hilwan
Jurnal Silvikultur Tropika Vol. 5 No. 3 (2014): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.5.3.%p

Abstract

The degradation of heath forest that caused by tin mining activity effected some environmental problems such as erotion, sedimentation and lose biodiversity. Restoration is become a way to recocover the ecosystem functions. Information about soil physical and chemical properties is needed for land restoration. Soil samples were collected by cluster sampling method in heath forest and two ages succession of ex-tin mineland (less than a hundred years and more than a hundred years). Study results showed that the soils generally were low Cation Exchange Capacity (CEC), organic matter, total nitrogen, available P, macro nutrient and clay content in soil texture. However in ex-tin mineland more than a hundred years, there is a trend of increasing of clay content also some soil parameters. Natural succession supported soil development even it take a very long of time. Restoration on these soil conditions should augmented the organic matter to repare the texture and make up the CEC by applying Legume Cover Crop (LCC) and Seed Soil Augmentation (SSA) technique.Keywords : heath forest, restoration, soil properties, SSA, tin mining.
Potential Carbon Stock in Revegetation Stand of Post-Mining Land at PT Jorong Barutama Greston, South Kalimantan POTENSI SIMPANAN KARBON PADA TEGAKAN REVEGETASI LAHAN PASCA TAMBANG DI PT JORONG BARUTAMA GRESTON, KALIMANTAN SELATAN Iwan Hilwan; Ade Siti Nurjannah
Jurnal Silvikultur Tropika Vol. 5 No. 3 (2014): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.5.3.%p

Abstract

Mining activities can generate the lost of vegetation that cause absorption of CO2 decrease. Reclamation and revegetation activities were expected could increase the absorption of CO2. The aims of this research are to presume and to compare carbon stock in revegetation stand of post-mining land in 2008, 2009, and 2010 cultivation at PT Jorong Barutama Greston. The estimation of carbon stock in Acacia mangium and Paraserianthes falcataria were conducted with allometric model while destructive sampling was used for litter and understorey. Total carbon stock of revegetation stand in 2008, 2009, and 2010 were 41.09, 27.43, and 22.90 ton/ha. The analysis value of vegetation showed that total species of understorey in 2008, 2009, and 2010 were 20, 19, and 26 specieses. The value of Pearson correlation test showed that understorey diversity state had not a significant effect for its carbon stock.Keywords: Acacia mangium, carbon stock, Paraserianthes falcataria, revegetation stand
Biophysical Characteristic in Various Conditions of Heath Forest in East Belitung Residence, Province of Bangka Belitung Islands KARAKTERISTIK BIOFISIK PADA BERBAGAI KONDISI HUTAN KERANGAS DI KABUPATEN BELITUNG TIMUR, PROVINSI KEPULAUAN BANGKA BELITUNG Iwan Hilwan
Jurnal Silvikultur Tropika Vol. 6 No. 1 (2015): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.6.1.%p

Abstract

Heath forest is one of forest ecosystem types in Indoensia as protected area and has specific condition and ecological functions. Quartz sands are main component of soil in heat forest floor which is very fragile for any disturbance. The damaged heath forest after quartz sand mined was very difficult to previous condition, therefore study of biophysical characteristics in primary and secondary heat forest are very important to conduct forest rehabilitation. The research result showed primer heath forest has higher plant diversity than secondary heath forest post mined 5 years and 15 years ago. Soil texture mostly sandy and soil chemistry is very acid (pH 3.6-5.3) with low fertility. Gelam (Melaleuca leucadendron) is a main pioneer plant species which can be used in revegetation program on post quartz mine land at Belitung Timur Residence.Key words: Acid soil, heath forest, Melaleuca leucadendron, quartz mining, revegetation
The Diversity of Undergrowth Species in The Eastern Part of Gunung Papandayan, Garut, West Java KEANEKARAGAMAN JENIS TUMBUHAN BAWAH DI GUNUNG PAPANDAYAN BAGIAN TIMUR, GARUT, JAWA BARAT Iwan Hilwan; Idealisa Masyrafina
Jurnal Silvikultur Tropika Vol. 6 No. 2 (2015): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.6.2.%p

Abstract

Gunung Papandayan has the potential of various types of fauna and flora that has become the unity in its natural environment. The objectives of this research was to determine the composition, diversity and potential of undergrowth that are found in the eastern part of Gunung Papandayan. The total of undergrowth species on Gunung Papandayan approximately 101 species of 34 families. The level of undergrowth diversity on five sites vary with a value of highest H’ at Supabeureum (3.36), while Tegal Mariuk has the smallest value of H’ (2.40). The low level of vegetation dominance indicated that undergrowth in five sites spreadon a lot of species. Undergrowth vegetation communities in five sites are differs with IS score was < 75 %. Undergrowth species which are found on Gunung Papandayan has potential as food, medicinal plants, ornamental plants, and livestock feed.Keywords: analysis of vegetation, diversity, Gunung Papandayan, undergrowth
Co-Authors Ade Siti Nurjannah Aldi Perdana Wiraatmadja Andesmora, Evan Vria Andry Indrawan Anggoro, Prima Anggraeni Antika, Tiara Ardiyansyah Purnama Arin Annisa Fathia Assajad, Zacky Nurrohman Azzahra, Nabilah Putri Fatimah Basuki Wasis Cahyo Wibowo Citra Rahmatia Dadan Mulyana Dhafin Maulidiyan Dian Ariyanti Dimas Prasaja, Dimas Dina Oktavia Dwi Mairida Eddy Nurtjahya Efita Karunia Harita Eko Putranti Handayani Erfanda Irawan Ewi Irfani Faadhila, Intan Hanifa Ghvirly Ramadhani Hariadi Saputra Haryantini, Baiq Azizah Hendriyana Rachman Henti Hendalastuti Rachmat IBNUL QAYIM Idealisa Masyrafina Ihsan Noor Irdika Mansur Istomo . Jenny Rumondang Johan Ariando Rajagukguk Kurniawati - Kurniawati Kurniawati, Kurniawati - Laijanan, Theresia Avilla Madja, Muhammad Daffa Nurhadi Suryadi MARIA BINTANG Maulidil Fajri Meida Rosani Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono Muhadiono, Muhadiono Mulyanto, Naufal Rafa Noor Faiqoh Mardatin Noor Farikhah Haneda Nur Mufarhatun Nurheni Wijayanto Nuroh Bawaihaty Rana Rio Andhika, Rana Rio Ria Astuti Rifaldo, Akhmad Sabila, Siska Aisyah Sethyo Vieni Sari Siahaan, Lasriama Siddiq Nurkholis Siti Nahla Supriyanto Teddy Rusolono Utami, Desty Sasana Putri Weda Gelar Pananjung Yadi Setiadi Yadi Setiadi YANTO SANTOSA Yentiana, Retno Ayu Yuda Purnama Yudi Setiawan Yustika Fadilah Siregar Zahrani, Alifia Sasky