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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Agromet Jurnal Silvikultur Tropika (JST) MEDIA KONSERVASI Jurnal Penelitian Hutan dan Konservasi Alam Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Agrokreatif Jurnal Ilmiah Pengabdian kepada Masyarakat BERITA BIOLOGI Jurnal Hutan Tropika Jurnal Risalah Kebijakan Pertanian dan Lingkungan Jurnal Pusat Inovasi Masyarakat Jurnal Sylva Lestari Jurnal Ilmu Kehutanan
Istomo .
Departemen Silvikultur, Fakultas Kehutanan Dan Lingkungan, Institut Pertanian Bogor, Jalan Ulin, Kampus IPB Darmaga
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Social Sciences

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PENGARUH PEMBERIAN PUPUK ORGANIK M-DEXT TERHADAP PERTUMBUHAN TANAMAN PALAHLAR (Dipterocarpus spp.) DI WILAYAH PERUM PERHUTANI BKPH JASINGA, KPH BOGOR Istomo, Istomo; Wilarso, Sri; Hidayat, Haris Arifiyanto
Jurnal Penelitian Hutan dan Konservasi Alam Vol 7, No 1 (2010): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

Salah satu upaya yang bisa dilakukan untuk mengatasi dan mencegah punahnya jenis pohon bernilai tinggi palahlar (Dipterocarpus spp.) di Jawa Barat  adalah dengan penanaman. Dalam menunjang keberhasilanpenanaman salah satu kegiatan pemeliharaan tanaman yang penting adalah pemupukan. Tujuan penelitian adalah untuk mengkaji pengaruh pemberian pupuk organik M-dext terhadap respon pertumbuhan anakan palahlar (Dipterocarpus retusus Bl. dan D. hasseltii Bl.).  Penelitian dilakukan pada blok penanaman palahlar di wilayah BKPH Jasinga, KPH Bogor seluas 3,5 ha. Rancangan penelitian menggunakan rancangan acaklengkap dalam percobaan faktorial dengan dua perlakuan yaitu jarak tanam (5 m x 5 m dan 3 m x 3 m) dan pemberian pupuk organik M-Dext (0,0; 1,0; dan 2,5 ml/tanaman). Waktu yang diperlukan untuk mengukurrespon pertumbuhan tanaman setelah pemupukan adalah enam bulan. Hasil penelitian menunjukkan bahwa kombinasi perlakuan jarak tanam 3 m x 3 m dengan dosis pupuk satu ml/tanaman memberikan pengaruhsangat nyata terhadap pertumbuhan tinggi dan diameter untuk D. hasseltii  masing-masing sebesar 2,31 cm/bulan dan 0,06 cm/bulan dan untuk D. restusus masing-masing 2,33 cm/bulan dan 0,03 cm/bulan
KARAKTERISTIK TEMPAT TUMBUH POHON PALAHLAR GUNUNG (Dipterocarpus retusus Bl.) DI KAWASAN HUTAN LINDUNG GUNUNG CAKRABUANA, SUMEDANG, JAWA BARAT (The Site Characteristics of Palahlar Gunung (Dipterocarpus retusus Bl.) in Protected 1) Forest of Cakrabuana Mountain, Sumedang, West Java) istomo, istomo; Pradiastoro, Andita
Jurnal Penelitian Hutan dan Konservasi Alam Vol 8, No 1 (2011): Jurnal Penelitian Hutan dan Konservasi Alam
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

Palahlar gunung (Dipterocarpus retusus Bl.) adalah salah satu jenis pohon famili Dipterocarpaceae yang bernilai tinggi yang terdapat di Jawa Barat. Keberadaan jenis tersebut terancam punah dan belum diketahui pembudidayaannya, oleh karena itu dengan tujuan untuk mengkaji karakteristik tempat tumbuh palahlargunung (Dipterocarpus retusus Bl.) penelitian ini dilakukan. Penelitian dilakukan di wilayah Hutan Lindung Gunung Cakrabuana, Sumedang, Jawa Barat. Penelitian dilakukan dengan jalur pengamatan lebar 20 m, arah tegak lurus kontur dari ketinggian 1.000-1.600 m dpl sebanyak tiga jalur dengan jarak antar jalur 500 m. Hasil penelitian menunjukkan bahwa pohon palahlar gunung (Dipterocarpus retusus Bl.) dijumpai pada ketinggian 1.000 sampai 1.225 m dpl dengan kelerengan 4-100% pada tanah Latosol yang bertekstur geluh debuan sampai lempung dengan tingkat kemasaman tanah masam sampai cukup masam. Pada ketinggian 1.000-1.099 m dpl pohon palahlar gunung (Dipterocarpus retusus Bl.) sebanyak sembilan pohon. Pada ketinggian 1.100-1.199 m dpl ditemukan sebanyak 12 pohon dan pada ketinggian 1.200-1.299 m dpl ditemukan sebanyak lima pohon. Pada kelas lereng 26-50% kelimpahan palahlar gunung (Dipterocarpus retusus Bl.) paling besar yaitu sebanyak 15 pohon. Pada kelas lereng 51-75% kelimpahan palahlar gunung (Dipterocarpus retusus Bl.) sebanyak lima dan empat pohon dan kelimpahan palahlar gunung(Dipterocarpus retusus Bl.) paling kecil terdapat pada kelas lereng 76-100% yaitu sebanyak dua pohon.
PENGARUH ASAL BAHAN DAN MEDIA STEK TERHADAP KEBERHASILAN STEK PUCUK TEMBESU FAGRAEA FRAGRANS (ROXB.) Istomo, Istomo; Subiakto, Atok; Rahmadianto, Susilo
BERITA BIOLOGI Vol 13, No 3 (2014)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v13i3.671

Abstract

Fagraea fragrans known as tembesu is a tree species used for panel wood (MDF, medium density fiberboard), particle board, veneer and furniture. The aim of this experiment was to know successful growth origin of shoot cutting F. fragrans and to study the effect of combination treatment the origin of cutting material and media F. fragrans. The shoot cutting was done with KOFFCO system. The results showedthat the cutting material from seedling juvenile shoot provided 61.56% of shoot formation, 91.42% of survivorship and 76.33% root formed.In addition, origin material from seedling juvenile gave a significantly effect on root length and wet root weight, wet shoot weight, dry root weight and significant on dry shoot weight parameter. The increasing age of the parent tree, diminishing cuttings success. The cuttings media cocopeat (coir dust) with paddy husk gives very significant effect on root length parameter, significant on wet root weight and gave very significant effect on root dry wet. There is an interaction between the cuttings material with cutting media, for root length parameter,wet root weight and dry root weight.
Keragaman Struktur Tegakan Hutan Alam Sekunder (The Variability of Stand Structure of Logged-over Natural Forest) Muhdin; Endang Suhendang; Djoko Wahjono; Herry Purnomo; Istomo; Bintang C.H. Simangunsong
Jurnal Manajemen Hutan Tropika Vol. 14 No. 2 (2008)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Differences in logging intensity, forestfires and forest encroachment have caused the variability of natural forest conditions, including its horizontal and vertical stand structures. Information on stand structure variability and dynamic of secondary forests is essential for projecting the future stand structure, which can be used to develop forest management plan. This study, which used 109 permanent sample plots data established on low and dry-land logged over natural forests in Kalimantan, showed that there was an obvious variability of the stand conditions after logging in terms of the trees number per hectare and horizontal stand structures.
Pendugaan Dinamika Struktur Tegakan Hutan Alam Bekas Tebangan Muhdin; Endang Suhendang; Djoko Wahjono; Herry Purnomo; Istomo; Bintang Charles H Simangunsong
Jurnal Manajemen Hutan Tropika Vol. 17 No. 1 (2011)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Dynamics of stand structure (DST), which could indicate the growth performance of logged-over forests, may vary depending on various factors, e.g. stand density, initial stand structure, species composition, time after logging, and environmental factors (rainfall, elevation, etc.). The variations of such factors could result in the variations of DST’s components (e.g. proportion of trees upgrowth and staying). However, this study, which used 75 permanent sample plots data of lowland and dryland natural forests in Kalimantan, showed that the proportion of trees upgrowth and staying could not be predicted satisfactorily using the number of trees, stand basal area, time after logging, and elevation as independent variables in multiple linear regression models. The regression models produced unrealistic projections of stand structures. In contrast, the projection of stand structures using the DST’s components that were calculated using arithmetic mean was better than that of the regression models.
Evaluasi Pertumbuhan Tanaman Meranti (Shorea spp.) di Haurbentes BKPH Jasinga KPH Bogor Perum Perhutani Unit III Jawa Barat I Istomo; Cahyo Wibowo; Nurul Hidayati
Jurnal Manajemen Hutan Tropika Vol. 5 No. 2 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Planting trials of Shorea spp. have been conducted outside their natural distributional range. Initially it was planted in Haurbentes Experimental Garden (1940) at Jasinga, West Java. This research is intended to get information about growth of all of Shorea's variety that have been planted at 1984, 1988 and 1992 at the location, so we can select the species that suitable to be explored. From each of them, we take four sample plots. The size of the sample plot is 50 m x 50 m or about 0,25 ha. The results of the trial showed that Shorea spp. stand was flowering and giving a good seed harvest.  It was also shown that the biggest growth species is Shorea leprosula Miq., namely 30,65 cm (total height) and 19,88 m (diameter) at 13 years old. The averages of the height and diameter growth are 0,49-0,66 m and 0,48-0,64 cm per 6 month at 9 years old. The species that are suggested to be explored at the location are S. leprosula Miq., S. stenoptera Burck, S. stenoptera Burck forma and S. pinanga Scheff.
Kandungan Fosfor dan Kalsium pada Tanah dan Biomassa Hutan Rawa Gambut (Studi Kasus di Wilayah HPH PT. Diamond Raya Timber, Bagan Siapi-api, Provinsi Riau) I Istomo
Jurnal Manajemen Hutan Tropika Vol. 12 No. 3 (2006)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Research on the biomassa, distribution and content of P and Ca nutrients in the soil and biomass was conducted in a primary forest with peat thickness ranging between 2.5 to 6.5 m in the forest concession area (HPH) of PT. Diamond Raya Timber, Bagan Siapi-api, the Riau Province. The objective of the research was to obtain data on the content of P and Ca in the vegetation and peat soil layers at several levels of peat thickness. Research results showed that although vegetation biomass constituted only 6 % of the total biomass of vegetation and peat soil, contain of P nutrient as much as 37 % and Ca 28 % out of the total P or Ca nutrients occurring in vegetation and peat soil. Increasing of peat thickness because the total content of nutrients in the peat soil also increased, although the average content of nutrient per depth interval of 50 cm decreased. Increasing of peat thickness alse increased the content of P or Ca for tree stage vegetation, on the other hand, the content of P or Ca in herbs and shurbs, decreased. This phenomenon shows that on peat thickness more than 3 m only higher vegetation (trees vegetation) could survive properly. Contetnt of P or Ca nutrients occuring at above ground tree stage vegetation reach 64 % and 74 %. While for tree stage vegetation, the biggest nutrient content occurred in branches, nas follows 44 % foer P and 40 % for Ca. Pioneer trees species and lesser known timber in fact had the highest P and Ca elernent concentration. For the highest Ca elements were in timah-timah (Ilex bogoriensis- 14,02 g kg-1), milas (Parastemon urophyllum,13,72 kg-1) and suntai (Palaquium dasyphyllum; 13,13 g kg-1). While for P element of beringin (Ficus benyamina;20,1 g kg-1), punak (Tetramerista glabra; 1,91 g kg-1) and terentang (Camnosperma macrophylla; 1,59 g kg-1).
Evaluasi Pertumbuhan dan Keragaman Genetik Tanaman Palahlar Gunung (Dipterocarpus retusus blume.) dan Palahlar (Dipterocarpus hasseltii blume.) Berdasarkan Penanda RAPD Detty Sumiyati; Fifi Gus Dwiyati; I Istomo; Iskandar Zulkarnaen Siregar
Jurnal Manajemen Hutan Tropika Vol. 15 No. 3 (2009)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Dipterocarpus hasseltii (palahlar) and Dipterocarpus retusus (mountain palahlar) are plant species of Dipterocarpaceae family that originate from West Java which population is getting rare. Information about growth development and genetic variation of palahlar is important to support culturing program and its genetic conservation. One of the techniques to study palahlar growth is through observation of the plant height and stem diameter increment. DNA analysis is use to gain information of palahlar genetic diversity. One of the DNA based molecular marker widely used as plant genetic marker is RAPD. There were 2 primary that resulting the best amplifying quality in genetic diversity analysis that was OPO-13 dan OPY 20. Analysis result with POPGENE 32 was resulting average genetic diversity between classes as much as 0.1869. The biggest genetic diversity for palahlar was on the medium growth class  as much as 0.2498 dan for mountain palahlar was in small growth class as much as 0.2240. Cluster analysis shows that there were 2 big groups that were medium-high growth class group   and small growth class group. Dendrogram shows that there were 2 species in one group, that was palahlar and mountain palahlar that was in one group of small growth class. The closed genetic distance existed between medium growth class group of palahlar and high growth class group (0.0383), while the far distance is between palahlar of small growth class group  with mountain palahlar of mediaum growth class group as much as 0.1826.
Estimation of Total Carbon Stocks in Soil and Vegetation of Tropical Peat Forest in Indonesia Ujang Suwarna; Elias; Istomo
Jurnal Manajemen Hutan Tropika Vol. 18 No. 2 (2012)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The study was conducted in the forest concession area of PT. Diamond Raya Timber, Riau Province, Indonesia. Measurement and calculation carbon stocks in soil and vegetation of tropical peat forest should be done accurately to anticipate carbon trading. The objective of the study is to estimate carbon stocks in soil and vegetation in 4 forest conditions. The study found that biomass and carbon stocks in the soil was 8 times higher than in the vegetation in primary forest condition, and 10 times in logged over forest and secondary forest condition. Carbon stocks in vegetation and soil were 189.45 ton C ha-1 and 1537.37 ton C ha-1 in primary forest, 161.76 ton C ha-1, and 1713.77 ton C ha-1 in logged over area, 139.05 ton C ha-1 and 1486.39 ton C ha-1 in secondary forest, and 43.09 ton C ha-1 and 1205.59 ton C ha-1 in degraded forest. Allocation of carbon stocks in the standing trees in primary forest, logged over area, secondary forest, and degraded forest were 70, 60, 62, and 7% respectively.
Pendugaan biomassa dan potensi karbon terikat di atas permukaan tanah pada hutan rawa gambut bekas terbakar di Sumatera Selatan Nong Ayu Eka Widyasari; Bambang Hero Saharjo; . Solichin; . Istomo
Jurnal Ilmu Pertanian Indonesia Vol. 15 No. 1 (2010): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Forest has an important role to absorb C02 which is used during photosynthesis to produce 02 and energy. Carbon was stored dominantly in biomass. When peat forest burnt, a lot of carbon emissions are acumulated in the atmosphere, which stimulate global warming. This study aims to estimate biomass and fix carbon contain in ex-burned merang peat forest and make models between biomass and fix carbon of various tree component (stems, branches, twigs and leaves) and also to calculate fix carbon and biomass stock in burned merang peat forest. The results show that biomass and fix carbon in burned merang peat forest can be estimated using allometric equation models: Wtotal = 0.153108 D2,40 and Ctotal = 0,0302 D2,35•  Fix carbon stock in the trees very related to biomass and it can be calculated using formula Ctotal = 0.188799 W0,980•  Stems store largest proportion of biomass in a single tree. They contribute to approximately 68.09 - 82.28% of total tree biomass. Leaves, twigs and brunch each contribute to 4.17 -  14.44%;  6.16 - 10.32%  and  7.15 -  7.45 respectively.  Fix carbon of trees can be estimated using biomass formula. It shows that each tree shares 16.49 - 17.70°/o of carbon from total biomass in average. Total biomass and fix carbon on the above ground of burned Merang peat forest are 151,650.48 kg/ha and  29,105.19 kg/ha respectively.
Co-Authors . Solichin Abdul Aziz Adisti Permatasari Putri Hartoyo Agus Hikmat Aji Nuralam Dwisutono Aji Nuralam Dwisutono Alvi Nadia Putri Andita Pradiastoro Andita Pradiastoro, Andita Ari Fardian Ariyani Pramudita Utami Atok Subiakto Atok Subiakto Atok Subiakto Azizah, Ummiati Bambang Hero Saharjo Basuki Wasis Berliyana, Cincy Bintang C. H. Simangunsong Cahyo Wibowo Detty Sumiyati Didik Suharjito Djoko Wahjono Edhi Sandra Elsa Widyastuti Endang Suhendang Erianto Indra Putra Eva Prihatiningtyas Fauzi Kiswantara Ferliana, Erika Fifi Gus Dwiyati Hamzah Hamzah Haris Arifiyanto Hidayat Haris Arifiyanto Hidayat, Haris Arifiyanto Herry Purnomo Hesti Lestari Tata Ida Sufaidah ISKANDAR ZULKARNAEN SIREGAR Iwan Hilwan Karlina Fitri Kartika Khairia Nafia Khalid Hafazallah Lailan Syaufina Leti Sundawati Lilis Setyawati Lisdayanti Lisdayanti Ma'shum Afnani Mega Damayanti Meyrista Sekar Agta Putri, Nindhy Mia Afriyani Mufti Abdillah Mufti Abdillah Muhdin Niechi Valentino Nisa Armila Nong Ayu Eka Widyasari Nur Eliya Farida Nurheni Wijayanto Nuroh Bawaihaty Nurul Hidayati Permatasari Putri Hartoyo, Adisti Prijanto Pamoengkas Prima Martha Dena Putri Novita Sari Rachmat, Henti Hendalastuti Rahaju, Sri Rahmadianto, Susilo Ramdhani Fitriansyah, Muhammad Rendra Piscestria Nugraha Rhomi Ardiansyah Rizki Mardhatillah Sandy Ghifary Sri Rahaju Sri Wilarso Sri Wilarso Sri Wilarso Budi Susanti, Cindhy Susilo Rahmadianto Syafda Roswandi Tarma Purwanegara Ujang Suwarna Vianti Vianti Wahyu Hartarto Yadi Setiadi Yuli Sunarti Yuniar Safitri