Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT <p><img src="https://e-journal.upr.ac.id/public/site/images/editorjht/JHT-DES_20171.jpg" width="120" height="170" /></p> <p><strong>Jurnal Hutan Tropika</strong> adalah jurnal yang memiliki fokus dalam bidang ilmu dan teknologi kehutanan tropika serta semua aspek yang terkait dengan bidang ini. Jurnal ini memiliki <a href="http://u.lipi.go.id/1180427939" target="_blank" rel="noopener">p- ISSN: 1693-7643</a>. Jurnal Hutan Tropika diikelola oleh jurusan Kehutanan, Fakultas Pertanian, Universitas Palangka Raya (Jurnal Hutan Tropika is a journal that focused on <em>science and technology of tropical forestry and also all aspects concerned. This journal has p-ISSN: 1693-7643. <a href="http://u.lipi.go.id/1555383188" target="_blank" rel="noopener">e-ISSN: 2656-9736</a> Journal Hutan Tropika is managed by Forestry Department, Faculty of Agricultural, Universitas Palangka Raya)</em></p> en-US jhtrop@upr.ac.id (Prof. Dr. Ir. Wahyudi, MP.,IPU) rinto.alexandro@fkip.upr.ac.id (Rinto Alexandro) Sat, 12 Sep 2020 02:19:43 +0000 OJS 3.2.0.3 http://blogs.law.harvard.edu/tech/rss 60 https://doi.org/10.36873/jht.v15i01.1709 Andy R. Mojiol¹, Audrey Eliseus¹ and Wahyudi Wahyudi² https://e-journal.upr.ac.id/index.php/JHT/article/view/1709 <p>The aim of the study was to determined and record mangrove species composition and<br>diversity at Pitas mangrove forest, Sabah. Mangroves forest occurs in waterlogged, salty<br>soils of sheltered tropical and subtropical shores. It usually found along the coastlines<br>throughout the world, usually between 25º N longitude and 25º S latitude. This study was<br>conducted in Pitas district (N 06?43’, E 117?4’) which is located at the northern tip of<br>Sabah, Malaysia. Whereas, Pitas district has an approximately 38,564 ha of the mangrove<br>area. In this study, the mangrove location covered an area ranges from Malawali island<br>(N 07?2.023', E 117?16.883'), Tobo island (N 07?01.070', E 117?19.008'), Layak-layak<br>island (N 06?56.587', E 117?14.323'), Mapan-mapan (N 06?51.608', E 117?14.861'), and<br>Jambongan island (N 06?45.016', E 117?25.816'). The random sampling method was<br>done with simple plots sizes of 20m x 20m to determine the species’ biodiversity,<br>composition and structure. As a result, 13 mangrove species have been identified in all<br>study locations namely known as Sonneratia caseolaris, Ceriops tagal, Bruguiera<br>gymnorhiza, Rhizophora mucronata, Aegiceras corniculatum, Avicennia marina,<br>Rhizophora apiculata, Sonneratia alba, Bruguiera cylindrica, Lumnitzera littorea,<br>Pemphis acidula, Scyphiphora hydrophyllacea, and Scaevola taccada. The result shows<br>that the Shannon –Wiener biodiversity index (H’) at the island and disturbed mangrove<br>areas is less diverse (H’ below than 1.5) compared to the undisturbed mainland areas<br>with (H’=1.95). Sonneratia caseolaris is the dominant mangrove species in the island<br>with the highest value of Important Value Index (IVI) with 144.77% compared to all<br>species in the study location. These areas show the importance of ecological aspects<br>within the forest ecosystem. Therefore, the protection and conservation of this mangrove<br>in this area is a necessity.<br>Keywords: Mangrove, species composition, diversity, Important Value Index (IVI),<br>island, mainland, disturbed, Pitas Sabah</p> Admin JHT Copyright (c) 2020 Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT/article/view/1709 Sat, 12 Sep 2020 00:00:00 +0000 https://doi.org/10.36873/jht.v15i01.1710 Reni Rahmawati, Patricia E Putir, M. Damiri, Yusinta Tanduh, Nursiah https://e-journal.upr.ac.id/index.php/JHT/article/view/1710 <p>Tujuan penelitian ini adalah untuk mengetahui keragaman Fungi Mikoriza Arbuskula<br>(FMA) lahan gambut konversi hutan alam menjadi perkebunan kelapa sawit di<br>Kotawaringin Timur. Penelitian dilaksanakan pada 4 (empat) lokasi di Kabupaten<br>Kotawaringin Timur, yakni: (1) Hutan rawa gambut alami di Kecamatan Kota Besi (2)<br>Lahan gambut untuk perkebunan kelapa sawit umur tanam kurang dari 4 tahun di<br>Kecamatan Parenggean; (3) Lahan gambut perkebunan kelapa sawit umur tanam 4-10<br>tahun di Kecamatan Cempaga; dan (4) Lahan gambut perkebunan kelapa sawit umur<br>tanam di atas 10 tahun di Kecamatan Mentawa Baru Ketapang. Pembuatan petak<br>pengamatan ukuran 20 m x 20 m dibuat pada setiap lokasi sesuai metode ICRAF.<br>Pengambilan sampel tanah dan akar secara komposit 5 (lima) titik pengambilan sampel<br>tanah pada kedalaman 20 cm di masing-masing lokasi sekaligus sebagai ulangan. Berat<br>tanah sampel setiap titik sebanyak 500 gr, sehingga total sampel tanah tiap petak<br>pengamatan adalah 2.500 gr. Sampel tanah tiap titik dalamsatu petak dicampur dalam<br>satu tempat hingga homogen untuk mewakili satu petak amatan, selanjutnya diambil 100<br>g per titik. Analisis data dilakukan dengan metode deskriptif dan dibantu gambar, grafik,<br>dan tabel. Hasil penelitian menunjukkan struktur infeksi yang membentuk struktur FMA<br>berupa hifa dan vesikel, sedangkan struktur FMA berupa arbuskula tidak dijumpai.<br>Kepadatan spora (100 g tanah gambut) tertinggi terjadi pada lahan gambut untuk<br>perkebunan kelapa sawit dengan usia tanam kurang dari 4 tahun (320,40), kelapa sawit<br>usia antara 4-10 tahun (276,20), dan disusul tanaman kelapasawit usia di atas 10 tahun<br>(211,20). Kepadatan spora terendah pada hutan gambut alami (152,20). Hasil identifikasi<br>spora FMA menemukan 12 (dua belas) spesies spora FMA genus Glomus sp. Spora<br>FMA genus Glomus sp merupakan satu-satunya jenis spora FMA, baik pada hutan<br>gambut alami maupun lahan gambut untuk perkebunan kelapa sawit dengan berbagai<br>usia tanam. Rata-rata kelimpahan Spora FMA Genus Glomus sp (100 g tanah gambut)<br>tertinggi pada lahan gambut untuk perkebunan kelapa sawit usia tanam kurang 4 tahun<br>(112,80), disusul kelapa sawit usia tanam antara 4-10 tahun (104,10), dan hutan gambut<br>alami (64,20). Rata-rata terendah pada lahan gambut untuk perkebunan kelapa sawit usia<br>tanam di atas 10 tahun (47,40). Rata-rata kelimpahan relatif Spora FMA Genus Glomus sp (100 g tanah gambut) tertinggi pada hutan gambut alami (42,64%), kemudian lahan gambut untuk perkebunan kelapa sawit usia tanam antara 4-10 tahun (37,69%), kelapa sawit usia tanam kurang 4 tahun (35,34%). Rata-rata terendah pada lahan gambut untuk<br>perkebunan kelapa sawit usia tanam di atas 10 tahun (22,48%).<br>Kata kunci : mikoriza, lahan gambut, kelapa sawit, identifikasi, struktur, kelimpahan</p> Admin JHT Copyright (c) 2020 Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT/article/view/1710 Sat, 12 Sep 2020 00:00:00 +0000 https://doi.org/10.36873/jht.v15i01.1711 Putra Agustinus Simarmata1 , Jumri Dulamin2 , M. Damiri2 https://e-journal.upr.ac.id/index.php/JHT/article/view/1711 <p>This study is to analyze the magnitude of forestry subsector trends on the economy,<br>especially on Gross Regional Domestic Revenue, Job Opportunities and Pulang Pisau<br>Total Value. This study uses secondary data and is analyzed by Straight Line Equations.<br>Research results obtained: 1. The contribution of the forestry sub-sector to the Pulang<br>Pisau Regency economy began to decline in 2010-2018. Where the highest contribution<br>was in 2010 which was 2.27% with a value of Rp 43,927.30 while the lowest contribution<br>value was in 2018 which was 1,44% with a value of Rp 70.494,50 with an average<br>growth of -5.45%. 2. The participation rate of Pulang Pisau Regency's employment<br>opportunities from 2010-2018 tends to decrease. For the highest contribution, there were<br>73,12% in 2010, while the lowest contribution was in 2017 with a value of 46% with an<br>average growth of 4,78%. 3. The Total Value of Forestry Subsector Exports in 2015-<br>2019 increased from year to year from the analysis of the total value of total forestry<br>exports in 2015-2019, the highest value was in 2018, namely USD 6,473,834.63 while<br>the lowest was in 2015, which was USD 58,679 60<br>Keywords: Gross Regional Domestic Revenue, Labor, Total Export Value</p> Admin JHT Copyright (c) 2020 Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT/article/view/1711 Sat, 12 Sep 2020 00:00:00 +0000 https://doi.org/10.36873/jht.v15i01.1712 Grace Siska, Lies Indrayanti https://e-journal.upr.ac.id/index.php/JHT/article/view/1712 <p>Kayu kawui adalah salah satu lesser known species yang belum banyak diketahui sifat-sifat<br>kayunya. Tujuan penelitian ini adalah untuk mengetahui sifat fisika dan mekanika kayu<br>kawui. Bahan penelitian dua pohon kawui berdiameter 28,34 cm dan 34,74 cm diambil dari<br>hutan alam. Bahan dipotong menjadi tiga bagian yaitu pangkal, tengah dan ujung,<br>pengujian mengikuti standar DIN. Penelitian menggunakan Rancangan Acak Lengkap<br>dengan satu faktor yaitu letak pada batang dengan tiga aras yaitu pangkal-tengah dan ujung,<br>seluruhnya dilakukan tiga ulangan. Hasil penelitian kadar air basah dan kering udara pohon<br>kesatu lebih besar dari pohon kedua. Berat jenis kering udara dan kering tanur keduanya<br>sama besar. Modulus elastis, modulus patah, keteguhan geser sejajar serat, keteguhan tekan<br>sejajar serat, keteguhan pukul pohon kesatu lebih kecil dari pohon kedua. Kekerasan<br>terendah sampai tertinggi adalah pada bidang tangensial, bidang radial dan bidang<br>transversal. Perlakuan arah aksial kadar air dan berat jenis tidak berpengaruh nyata, uji<br>keteguhan geser sejajar serat, kekerasan bidang tangensial, radial serta keteguhan lengkung<br>statis berpengaruh nyata. Hasil uji Beda Nyata Jujur perlakuan terbaik untuk keteguhan<br>geser sejajar serat pada bagian tengah, kekerasan bidang radial pada pangkal, kekerasan<br>bidang tangensial dan keteguhan lengkung statis pada bagian ujung. Berat Jenis kayu kawui<br>masuk kelas kuat III, MoE masuk dalam kelas kuat II-IV, MoR dan keteguhan tekan sejajar<br>serat masuk kelas kuat II. Kayu kawui cocok untuk penggunaan bahan bangunan, plywood,<br>meubel, lantai, dinding, bantalan, kusen-kusen dan kapal.<br>Kata kunci: Kawui, sifat fisika, sifat mekanika, kelas kuat II dan III.</p> Admin JHT Copyright (c) 2020 Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT/article/view/1712 Sat, 12 Sep 2020 00:00:00 +0000 https://doi.org/10.36873/jht.v15i01.1713 Bela Safitri1 , Wahyudi Wahyudi2 , Christopheros2 https://e-journal.upr.ac.id/index.php/JHT/article/view/1713 <p>Sengon (Paraserianthes falcataria (L) Nielsen) is one of some exotic plants, so that it is<br>suitable for planting on mounds of peat-swamp land in support of revegetation and<br>reforestation, and also to develop plantation forest. This plant have the short rotation,<br>high economic and ecologically value. The aims of research was to know the diameter<br>distribution of sengon to detect normal growth as well as they were planted on the<br>mounds of peat-swamp land and on the traditionaly peat swamp land that flooding<br>periodically. Data were analized using polynomial equations to form the distribution<br>graphs. Based on result, at the 4.5 years old of sengon planted on the the mounds of<br>peat-swamp land and on the traditionaly peat swamp land indicated the normal graph and<br>abnormal graph respectively. Sengon that planted on the mounds of peat swamp land<br>formed the polynomial equation Y= -35,4 + 47,043X – 6,7857 X2 with coefficient of<br>determination (R2<br>) namely 90.41%, meanwhile Sengon that planted on the traditionaly<br>peat swamp land formed the polynomial equation Y= -10 + 53,643X – 17,571 X2<br>+ 1,5<br>X<br>3 with coefficient of determination (R2<br>) namely (R2<br>) namely 85.99%. Therefore,<br>sengon that planted on the mounds of peat swamp land growth better than sengon that<br>planted on the traditionaly of peat swamp land<br>Keywords: Growth, polynomial, sengon, peat swamp land</p> Admin JHT Copyright (c) 2020 Jurnal Hutan Tropika https://e-journal.upr.ac.id/index.php/JHT/article/view/1713 Sat, 12 Sep 2020 00:00:00 +0000