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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Manajemen dan Agribisnis BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Penelitian Sosial dan Ekonomi Kehutanan
Endang Suhendang
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Economics, Econometrics & Finance Environmental Science Immunology & microbiology Social Sciences Veterinary

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Pengembalian Ekonomi dalam Pengelolaan Hutan Alam Produksi: Suatu Pendekatan Dinamika Sistem Mohamad Subhan Labetubun; Endang Suhendang; Dudung Darusman
Jurnal Manajemen Hutan Tropika Vol. 11 No. 2 (2005)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This research was aimed at obtaining economic returns of uneven-aged forest management based on system dynamic model approach. Logged-over natural forest in the concession area of PT. Telagabakti Persada, North Moluccas was selected for study. Stand structure dynamic model was estimated from re-measured permanent sample plot. It consists of ingrowth, upgrowth and mortality functions. The model was constructed based on species group (Dipterocarpaceae, Non Dipterocarpaceae and Non Commercial). Then, prediction data compared with the actual data. The economic criteria were the land expectations value, net present value, benefit cost ratio and annual equivalent value of net present value. The cutting simulation result shows that an increase of cutting intensity had lengthened cutting cycle. Increase of cutting cycle had increased land expectation value. Increase of land expectation value had decreased tree diversity. Increase of royalty and interest rate had increased land expectation value. Changes of royalty and interest rate were not affected on optimum cutting alternative.Key words:  
Metode Survei Kayu Rakyat Berdasarkan Karakteristik Sosial Ekonomi dan Biofisik Kawasan: Studi Kasus di Kabupaten Bogor (Survey Method for Timber Stand of Private Forest based on Socio-economics and Biophysical Characteristics: a case study in Bogor Dis Tien Lastini; Endang Suhendang; I Nengah Surati Jaya
Jurnal Manajemen Hutan Tropika Vol. 12 No. 1 (2006)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The objective of this research is to determine the appropriate survey method for timber stand of private forest, based on its important characteristics. There were three methods used in this research, namely, method according to basic data i.e social-economics and biophysic data; method based on image, approached by vegetation transformacy using NDVI; and method based on integration of basic data and image. The result showed that basic data method is the best method for stratification of the village (desa), as a primary sampling unit of the private forest population (district). The second ones is basic data and image-integration method and last ones is image method.Keywords : basic data, coefficient of variation, image, NDVI, private forest, survey method, timber.
Studi Intensitas Cahaya Dan Cendawan Mikoriza Arbuskula Pada Permudaan Alam Ramin (Gonystylus Bancanus (Miq.) Kurz) (Study on Arbuscular Mycorrhizal Fungi and Light Intensity to the Natural Regeneration of Ramin (Gonystylus bancanus (Miq.) Kurz)) Abdurrani Muin; Yadi Setiadi; Sri Wilarso Budi; Irdika Mansur; Endang Suhendang; Supiandi Sabiham
Jurnal Manajemen Hutan Tropika Vol. 12 No. 3 (2006)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The objective of this research is to find out the early information of optimum light intensity and highest mycorrhizal colonization on natural Ramin seedling which it includes in semitolerant plant. The research was conducted in Ramin Natural Forest of Sungai Pelunjung Labai, Sanggau District, West Kalimantan for a year. The results of the research show that there are correlations between light intensity with mycorrhizal colonization. Ramin seedling which grown under the light intensity 3190 – 9500 lux have high mycorrhizal colonization and their growth better than the other treatment. Meanwhile Ramin seedling which grown in closed area or in open area with light intensity less than 1670 lux and more than 10840 lux respectively have lower mycorrhizal colonization and their growth was lower.Key words: Ramón seedling  (G. bancnus), Light intensity and Mycorrhizal Fungi
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.
Penggunaan Analisis Regresi Terboboti dalam Penyusunan Model Pertumbuhan Peninggi Acacia mangium Willd. M Muhdin; Endang Suhendang
Jurnal Manajemen Hutan Tropika Vol. 15 No. 1 (2009)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The compilation of growth stand model usually uses the regression analysis. Homoscedasticity or residual kind homogeneity is one assumption which underlying the use of this regression analysis.  Breaking this assumption causes the low of model accuracy which is shown by the low of determination coefficient and the height of error standard. The problem of heteroscedasticity can be solved by using weighted regression analysis.The Selected Raiser Growth Model equation in this research was transformed into a model equation: ln P = a + b/A, where there was a significant correlation between the growth and the age (R2  = 55.04%, sb0 = 0.041, and sb1 = 0.171).  From the use of weighted regression analysis with weightier wi = 1/”Xi, it can be concluded that there was no real correlation between the growth and the age (R2 = 0.55%, sb0 = 0.572, and sb1 = 2.560).  The use of weightier shows much lower accuracy than without weightier.  However, from the use of weighted regression analysis with weightier: wi = 1/si2, where si2 = residual kinds at free variable group to I (X1) shows that there was significant correlation between the growth and the age (R2 = 45.46%; sb0 = 0.084, and sb1 = 0.205).  There fore it can be said that the accuracy was much better than regression without weightier.  Furthermore,  the use of weighted regression analysis with weightier wi = 1/si2, where  si2 is residual kind at free variable to i (X) which is estimated through second orde polynomial regression model shows a very significant correlation between the growth and the age (where R2 = 87.22%, sb0 = 0.029, and sb1 = 0.072). The last result shows a better accuracy than the preceding treatments.  From this research, it can be concluded that by using a suitable weightier, the use of weighted regression analysis in compiling raiser growth model can improve the model accuracy.
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.
Model Penduga Produksi Kopal Wien Setya Budhi Irawan; Endang Suhendang; Juang Rata Matangaran
Jurnal Manajemen Hutan Tropika Vol. 13 No. 3 (2007)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The objective of this study was to find out the prediction model  for copal production (Y) by  the use of prediction variables. The variables were diameter (X1), bark thicknesses (X2), stand density (X3), slope (X4), and direction of the slope (X5). The study was conducted at Senduro Forest District, Probolinggo Forest Management Unit of Perum Perhutani, Unit II East Java. Data was collected from 80 sample trees of Agathis loranthifolia Salibs which were tapped on August 2006.  The  result of the study showed that there were several  regression prediction models  for  copal production:  doubled linear, multiplicative, exponential and quadratic regression models. Multiplicative regression model with the highest  R2-adj  value was  then chosen  as the best prediction model  for  copal production.  Thereby, production estimation model of copal production of Agathis loranthifolia Salis. was  LogY = 0.397 + 1.54 LogX1 + 0.496 LogX2  -  0.528 LogX3 + 0.201 LogX4  ; or Y = 2.4945X11.54X20.496X3-0.528X40.201; R-Sq =84.7%, R-Sq(Adj) = 83.7%.  Keywords:  multiplicative regression model, copal, diameter, bark thickness, stand density, slope
Periodic Comprehensive Forest Inventory on Production Forest Management in Papua Province Financio Dorebayo; Endang Suhendang; Muhdin Muhdin
Jurnal Manajemen Hutan Tropika Vol. 21 No. 3 (2015)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The Periodic comprehensive forest inventory (Inventarisasi Hutan Menyeluruh Berkala called IHMB) is Indonesian forest stands inventory were based on compartment at forest effective area of forest management unit (FMU). To preserve sustainable forest management, IHMB implementation are used as a benchmark on the determinate of maximum cutting area and large of timber volume that can be produced by FMU to preparing long-term forest planning. The purpose of this study is to assess the suitability and accuracy of the IHMB implementation results to arranging forest management plan that aims to produce sustainable timber. Data gathered with direct observation on FMU (PT. Bts and PT. SMS) in Papua Province. Data analysis using descriptive statistic method and the sampling is using purposive sampling method. The study showed that the data and information collected in accordance with IHMB guidelines have not covered all the necessary data to arranged forest management plans based on the sustainability forest principles to appropriate with the criteria and indicators of sustainability. IHMB Implementation is the important activity on FMU. The sense of word “comprehensive” on IHMB is meaningfully only covered the forest area, without including all components of the data and information on forest ecosystem..  
Changes in Land Use/Land Cover Patterns in Indonesia’s Border and their Relation to Population and Poverty Fransiscus Xaferius Herwirawan; Cecep Kusmana; Endang Suhendang; Widiatmaka Widiatmaka
Jurnal Manajemen Hutan Tropika Vol. 23 No. 2 (2017)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

This study analyzes the pattern and change of land use and land cover (LULC) during 2000−2015 and its relation to population and poverty in the semi-arid region of Indonesia in Timor Island, on the country border to Republic Dominica Timor Leste (RDTL). The analyzes employ visual interpretation using GIS to aid classification of Landsat imagery and find 14 classes of LULC.  The matrix of LULC change for the 15 years period indicates a substantial deforestation in which 1,309 ha or 13% of the forest in year 2000 has disappeared. In detail, 2 ha (7%) of primary mangrove forest has became mixed farming and 1,307 ha (19%) of secondary forest has become shrub. Within the nonforest classification, 1,288 ha (17%) of shrub in 2000 has turned into savannah, and 15 ha (10%) of shrub swamp has turned into bare land, while at the same time human settlement has expanded by 118% from the settlement area in year 2000. Spatial pattern of LULC changes in the study area for 15 years are dispersed, and tend to remained in the middle area that dominated by mix agriculture. The forest cover is weakly associated with level of poverty and rural population in the study area. However, the two latter variables were not significantly associated with deforestation.
PERBANDINGAN DAYA SAING PRODUK GONDORUKEM DI PASAR INTERNASIONAL Achmad Fachrodji; Ujang Sumarwan; Endang Suhendang; Harianto Harianto
Jurnal Manajemen & Agribisnis Vol. 6 No. 2 (2009): Vol. 6 No. 2 Oktober 2009
Publisher : School of Business, Bogor Agricultural University (SB-IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (717.35 KB) | DOI: 10.17358/jma.6.2.140-151

Abstract

A high value non-wood product which is currently highly demanded in the local and international market is the Gondorukem (Gondorukem), produced from heating the pine’s tree gum (Pinus merkusii Junk). The constraint that we deal with is the fluctuation Gondorukem’s price which is triggered by the behavior of the Chinese industrialist since China is the biggest producer of Gondorukem. This research is aimed to compare the Gondorukem’s competitive advantage point a view from the industry, enterprises and countries’ among China, Brazil and Indonesia. The study is not only about comparing the Pine forest as a natural resource and measuring its productivity per hectare, but also observing the productivity and efficiency of the workers in each country. The analysis of industrial competitiveness is measured by using RCA# index, and the production cost and profit margin ratio is used to measure competitiveness among the enterprises. It can be concluded that China has the largest area of sap-tapped pine forest and Brazil is the highest for its forest productivity and workers’ efficiency, however Indonesia has the highest ratio of production cost and profit margin among the other countries. In term of the value of RCA# during the year of observation 2001 up to 2008, China exceeded Indonesia and Brazil. It’s expected by this research that Indonesia will be able to intensify the currently sap-tapped areas and expand the production area (extensive efforts) by utilizing the pine forest outside Java. It’s also proposed to increase the production by working on research about pine tree which produces more sap, performing comparative study to Brazil and raising up the wage of the sap-tapped workers.
Co-Authors Abdurrani Muin Achmad Fachrodji Atang Sutandi Bahruni Bahruni Bintang C H Simangunsong Djoko Wahjono DUDUNG DARUSMAN Endang Hilmi Financio Dorebayo Fransiscus Xaferius Herwirawan Hadi S. Alikodra Harianto Harianto Herry Purnomo I Nengah Surati Jaya Irdika Mansur Istomo . Juang Rata Matangaran Lilik Kartika Sari M Muhdin Mohamad Subhan Labetubun Muhdin Muhdin Muhdin Sri Wilarso Budi R Tien Lastini Tri Nur Cahyo Ujang Sumarwan Wahyu Nazri Yandi Widiatmaka . Wien Setya Budhi Irawan Yadi Setiadi