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KONTRIBUSI SEKTOR KEHUTANAN TERHADAP PEREKONOMIAN WILAYAH: KASUS PROVINSI LAMPUNG Sanudin Sanudin; San Afri Awang; Ronggo Sadono; Dan Ris Hadi Purwanto
Bumi Lestari Journal of Environment Vol 15 No 1 (2015)
Publisher : Environmental Research Center (PPLH) of Udayana University

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

Abstract

One of economy growth indicator is Gross Regional Domestic Product (GRDP).  Theresearch was aimed to know contribution of forestry sector to regional economy in LampungProvince.  Data used were GRDP and Gross Domestic Product (GDP) on 2000 constantmarket prices during 2004 to 2013 period.  Location Quotient (LQ), Multiplier Effect, andShift Share Analysis (SSA) were used in this research.  The results showed that in the period2004-2013, forestry sector is not a basic sector in Lampung Province with LQ value 0.18.Multiplier effect value of forestry sector is 94.92 which means that every additional incomeof Rp Y in the forestry sector will result in added revenue of 94.92 x Rp Y in agriculturesector.  Forestry sector GRDP contributed for 0.38 percent to regional economy of LampungProvince. National growth component of forestry sector in Lampung Province gives a positiveeffect to national growth.  Industrial mix component of forestry sector in Lampung Provinceis slower than national average.  Local share component has a positive value which meansthat the forestry sector in Lampung Province is competitive.
KEANEKARAGAMAN JENIS TUMBUHAN BERKAYU PADA PLOT MONITORING TAMAN WISATA ALAM GUNUNG MEJA MANOKWARI Novita Panambe; Ronggo Sadono; Djoko Marsono
JURNAL KEHUTANAN PAPUASIA Vol 1 No 2 (2015): Jurnal Kehutanan Papuasia
Publisher : Fakultas Kehutanan UNIPA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46703/jurnalpapuasia.Vol1.Iss2.37

Abstract

Taman Wisata Alam (TWA) Gunung Meja Manokwari memiliki keanekaragaman spesies tumbuhan berkayu yang tinggi dengan keunikan spesies yang berbeda dengan spesies di daerah lainnya. Tujuan penelitian adalah untuk mengetahui keanekaragaman jenis tumbuhan berkayu pada plot monitoring biodiversitas flora TWA Gunung Meja. Penelitian ini dilakukan di plot monitoring biodiversitas flora TWA Gunung Meja seluas 25 ha pada plot yang dibuat tahun 2005, 2006 dan 2008. Metode yang digunakan adalah metode deskriptif dengan teknik observasi. Hasil penelitian pada plot monitoring biodiversitas flora menunjukan bahwa tumbuhan berkayu terdiri dari 134 jenis dan 39 famili untuk tingkat semai, 162 jenis dan 47 famili tingkat pancang, 169 jenis dan 38 famili tingkat tiang, 148 jenis dan 34 famili tingkat pohon. Dominansi jenis pada fase semai adalah Pometia coreacea, fase pancang jenis Aglaia odorata, fase tiang jenis Medusanthera laxiflora dan fase pohon jenis Pometia coreacea. Indeks keanekaragaman jenis pada setiap fase pertumbuhan tinggi, yaitu fase semai 3,8064, fase pancang 4,4828, fase tiang 4,3044 dan fase pohon 4,2270.
Karakteristik Biofisik Ruang Terbuka Hijau Pada Hutan Kota Samarinda, Provinsi Kalimantan Timur Sri Endayani; Ronggo Sadono; Ambar Kusumandari; Hartono Hartono
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol. 9 No. 4 (2019): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan
Publisher : Graduate School Bogor Agricultural University (SPs IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.9.4.977-985

Abstract

Population growth and economic activity always require space. Physical, social and economic composition always changes due to spatial land use. Changes in spatial land use that do not take into account the biophysical balance will result in natural disasters. Urban problems in the use of space result in the disturbance of the harmony between human and the nature. The economy is improving, but the nature is suffering from damages. Green open space is the right solution. This research’s objective is to determine the biophysical characteristics (soil characteristics, stand potential, slope and rainfall) of the urban forests in Samarinda. The results show the class of clay texture, acid soil pH, low organic matter and gray brown color. The urban forests in Samarinda are dominated by species of Jati (Tectona grandis), Jati Putih (Mangifera indica), Mahoni (Swietenia macrophylla), Jambu (Anacardium occidentale), Jambu Batu (Psidium guajava), Kayu Jawa (Lannea grandis), Gmelina arborea, Angsana (Pittocarpus indicus), Bitti (Vitex cofassus), Trembesi (Samania samania), Morinda citrifolia and Kapuk (Ceiba Pentandra), hilly slopes, rather steep altitude range of 16-65 mdpl and an average rainfall of 1 095.9 mm/year.
Allometric Equation for Estimating Energy Production of Eucalyptus urophylla in Dryland Ecosystems at East Nusa Tenggara Ronggo Sadono; Wahyu Wardhana; Fahmi Idris; Pandu Yudha Adi Putra Wirabuana
Jurnal Manajemen Hutan Tropika Vol. 28 No. 1 (2022)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.28.1.32

Abstract

A precise and accurate energy production quantification, particularly at the individual tree level is needed to understand the potential contribution of eucalyptus plantations to renewable energy development. However, measuring energy storage with a destructive method is inefficient because it requires a large amount of resources. The development of allometric equations is a realistic solution to solve this problem as it facilitates the efficient estimation of energy production from trees. Therefore, this study aims to develop an allometric equation for estimating the energy production of Eucalyptus urophylla in dryland ecosystems in East Nusa Tenggara. The destructive sampling was carried out on 25 sample trees which are evenly distributed from small to large dimensions, while the calorific value of each tree component was analyzed using the bomb calorimeter method. Furthermore, the energy production of each tree was counted by multiplying the calorific value with the total biomass accumulation. To develop an allometric equation, the analysis of regression was applied using several independent variables, such as diameter at breast height (D), combined squared diameter of breast and tree height (D2H), as well as D and H separately. The results showed that the energy production of E. urophylla at the study site varied from 252.56 to 7,813.30 MJ tree-1 with more than 90% accumulated in the stem, followed by foliage (4.62%) and branches (4.05%). The higher the tree dimension, the greater the energy production. Moreover, the equation lnŶ = lna + b.lnD + c.lnH was the best allometric model to estimate energy production with an accuracy of 95.2%. Based on the results, the allometric equation provides an accurate estimation of energy production in E. urophylla.
Komposisi Jenis dan Struktur Tumbuhan Bawah pada Hutan Tanaman Jati Bertumbuhan Ketela Pohon di KPH Ngawi, Jawa Timur Soewarno Hasanbahri; Djoko Marsono; Suryo Hardiwinoto; Ronggo Sadono
Biota : Jurnal Ilmiah Ilmu-Ilmu Hayati Vol 18, No 2 (2013): June 2013
Publisher : Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/biota.v18i2.395

Abstract

AbstractThe existence of Cassava under the Teak stand, in Ngawi Forest District, have change the undergrowth species composition and their ecological structure. Based on the research results of the different age class of teak plantation forest (II – V) could be concluded that the species composition of undergrowth tend to decrease either species number or individual number of each species. Only 4 species from 21 species of undergrowth that were found in all of the research compartments those are Hoplismenus burmani, Clitoria ternatea, Eupatorium odoratum and Synedrela nudiflora; and their distribution were horizontally aggregated. For vertical structure of the undergrowth community were not different for each compartment with Cassava. The nutrients rate information of the soil under teak stand with cassava showed low enough.Key words: Undergrowth, cassava, ecological structure, teak standAbstrakKeberadaan tanaman Ketela pohon di bawah tegakan hutan tanaman Jati di KPH Ngawi telah mengakibatkan terjadinya perubahan komposisi jenis tumbuhan bawah dan struktur ekologisnya. Berdasarkan hasil penelitian pada petak hutan tanaman Jati dengan kelas umur yang berbeda (KU II-V) dapat disimpulkan bahwa komposisi jenis tumbuhan bawah cenderung menurun baik dalam jumlah jenis maupun jumlah individu setiap jenis. Hanya ada 4 jenis dari 21 jenis tumbuhan bawah yang dijumpai dari seluruh petak hutan tanaman Jati yang digunakan dalam penelitian ini, yaitu Hoplismenus burmani, Clitoria ternatea, Eupatorium odoratum dan Synedrela nudiflora; dan sebaran horizontalnya mengelompok. Untuk struktur vertikal komunitas tumbuhan bawah pada petak hutan tanaman Jati bertumbuhan Ketela pohon ternyata tidak jauh berbeda antara satu petak dengan petak yang lainnya dari kelas umur yang berbeda. Kandungan hara dalam tanah dibawah tegakan hutan tanaman Jati bertumbuhan Ketela pohon berada pada tingkat yang rendah.Kata kunci: Tumbuhan bawah, ketela pohon, struktur ekologis, tegakan Jati