Jurnal Penelitian Kehutanan Wallacea
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Hydrological Responses of Agroforestry System Application which is Not Based on Land Suitability, A Case Study in Cimuntur Watershed
Full text linkLand use in a watershed should consider land capability and watershed carrying capacity so that the land can optimally. Agroforestry is a land use system that not only aims to generate income for the people but also to maintain hydrological conditions of a watershed. This research aims to evaluate the hydrological responses due to the application of agroforestry system on several land use pattern that has been changed. There are three steps in the analysis: (1) Assessment on land use planning (RTRW), (2) Land use suitability classification for agroforestry system, and (3) Development of scenarios for suitable land use of agroforestry system for hydrological function. The results of this study show that the application of agroforestry system of woody plant (i.e. sengon), fruit plant (i.e. Nephelium lappaceum), annual crops (i.e. clove, coconut, Parkia speciosa and banana), perennial crops (i.e. cardamom, and banana), and seasonal crops (i.e. cassava) on unsuitable land use gives the lowers on Coefficient of River Regime (KRS), specific discharge, Run off Coefficient (C) and Total Dissolve Sediment (TDS). This agroforestry system can be applied on several land use pattern that has been changed, because this system not only aims to generate income for the people but also to the maintain hydrological condition of a watershe
Chemical Properties of Modified Mahogany Wood by Heat Treatment
Full text linkMahogany woods from community forests generally have relatively low qualities due to lack of maintenance activities and for their young harvesting stage. Heat treatment is known as wood modification method that could improve the quality of the wood. The aim of this study was to determine the interaction effect of temperature and method of heat treatment on the chemical properties of young mahogany wood. Materials used in this research were mahogany wood boards from community forest which were heat-treated using oven and steam methods performed at the temperature of 90°C, 120°C, and 150oC for 2 hours. In this research, some chemical changes were analyzed. Results of the research showed that the interaction of temperature and heat treatment method gave a significant decreasing on the pentosan amount, and hot-water extractive solubility, particularly the steaming at 150oC. The increasing temperature of heat treatment significantly decreased the content of holocellulose, α-cellulose, hemicellulose, and pH values whereas it increased lignin content, extractives (cold-water and alcohol-benzene extractives) and solubility in 1% NaOH. Steaming method provided lower levels in the content of holocellulose, ethanol-benzene extract, cold-water solubility, and pH values compared to the oven heating. However, the steaming method over 1200C should be considered as it would reduce the wood strengths
Estimating The Abundance and Composition of Soil Seed Bank at Bekol Savanna in Baluran National Park, West Java
Full text linkThe composition of soil-seed bank reflects the condition of vegetation in the past and could be used for predicting the composition of plants that will grow in the future. This study aims to determine the amount and composition of soil-seed bank in Bekol savanna, Baluran National Park. Soil samples were taken using a combination method of quadrat-transect on the invaded and not invaded areas by Acacia nilotica. Soil samples were extracted using wet-sieving method. After the extraction process, the seeds were identified and calculated using a stereo microscope. The result showed that soil-seed bank density was lower at the invaded location (7,566.88 seeds/m3) as compared to the uninvaded location (16,798.3 seeds/m3). The soil-seed bank was found in the invaded site comprising 12 species of broadleaved weeds and 5 species of grasses from 7 families, whereas those in the uninvaded area consisted of 10 species of broadleaved weeds and 7 species of grass from 8 families. This study showed that the invasion of A. nilotica significantly affected the amount and composition of soil-seed bank in various soil depths of Bekol savanna
Growth of Red Sengon (Albizia chinensis (Osbeck) Merr.) Seedlings on the Molded Seedling Media and Its Comparison with Polybag Seedling
Full text linkThe development of alternative methods for land and forest rehabilitation is necessary for producing good quality seedlings. This study aims to examine and compare the effect of addition of mycorrhiza and rhizobium on the growth of red sengon (Albizia chinensis (Osbeck) Merr.) seedlings in molded seedling media (BMSM) and the addition of various dosages of basic fertilizers to the seedlings on polybags. Seedlings in MSM were tested in the nursery until the age of 3 months. The field test was conducted by comparing the growth of red sengon (6 months after planting) seedlings from the BMSM and seedlings on polybags. The design used was a randomzed block design. BMSM that has been added with 3 g of rhizobium per seedling gave the best growth seedling and plant growth in the field. The growth of the seedling on polybags was increased by giving basic fertilizer of 5 kg per planting hole. Red sengon seedlings originated from seedling in BMSM with the addition of 3 g of rhizobium and seedlings on polybag with a dosage of 5 kg basic fertilizer had the highest growth. BMSM as an alternative technology for tree seedling production can be used for planting, and land or forest rehabilitation
High temperature drying properties and basic drying schedule of 5 lesser-known species from Riau
Full text linkDrying process is a crucial stage in the utilization of any wood for construction and furniture purposes. The study aimed to: (i) investigate the sensitivity of several lesser-known wood species from natural forest in Riau to drying process at high temperature; and (ii) develop basic drying schedule for each wood. Five lesser-known species from Riau were investigated, namely punak (Tetramerista glabra), mempisang (Diospyros korthalsiana), pasak linggo (Aglaia argentea), meranti bunga (Shorea teysmanniana) and suntai (Palaquiumburckii). Modified Terazawa’s (1965) method was used for the experiment. The result shows that deformation was found for all species. The most severe deformation level was observed for both punak (score value of 4-6) and mempisang (score value of 4-5). On the other hand, pasaklinggo experienced the most severe initial end/surface check/split (score value of 6) and honeycombing (score value of 5). The result also showed that punak and pasaklinggo can be dried with the same drying schedule at the temperature range of 40-65° C and the humidity range of 38-88%. The proposed temperature and humidity ranges (or drying schedules) are 50-80° C and 28-80% for suntai, 50-70° C and 25-80% for mempisang, and 50-70° C and 40-84% for meranti bunga. Mempisang and suntai can use the same drying condition until fiber saturation point, then different drying condition applies
Daur Optimal Hutan Tanaman Sengon Dalam Proyek Aforestasi: Review Hasil Penelitian Suharlan 1975
Full text linkForests play an important role in climate change mitigation by absorbing carbon dioxide in the atmosphere. Additional revenue from carbon credits may change the optimal management of plantation forest. This research aims to analyze the optimal rotation of joint production of timber and carbon sequestration of sengon stand in Java. The method used in this research is the profit maximization of forest stand obtained from wood sales and carbon credits (i.e. Hartman rule as a modification of Faustmann rule). The results of this study showed that (1) the biological rotation of sengon forest in site quality (SQ) III and IV are 6 and 5 years respectively, (2) Financial rotations of sengon forest in SQ III and IV are 8 and 6 years respectively, and (3) Additonal income from carbon sales in afforestation project will not lengthen the optimal rotation of sengon plantation
Changes in the Characteristics of After Logging Streamflow Hydrograph of Eucalyptus pellita F. Muell Stands
Full text linkEucalyptus pellita F. Muell plantation in Riau Province applying the clear cutting silvicultural system on fast growing tree species allegedly have an impact on the changing of watershed hydrological functions. The aim of this study was to determine the changes in the chara cteristics of after logging stream flow hydrograph of E. pellita forest stand. The research was carried out in E. pellita plantations in Perawang, Riau Province using 4.62 ha of micro catchment as an observation unit. The method used is the analysis of hyd rograph units on chosen data of flood hydrograph. The research concludes that clear cutting system has led to increasing the peak flow discharge from an average of 0.226 m 3 .s 1 to be 0.322 m 3 .s 1 , shortening the time base of hydrograph from an average of 1 43 minutes to be 90 minutes, shortening the time to peak flow from an average of 80 minutes to be 40 minutes, as well as declining the base flow from an average of 0.0056 m 3 .s 1 to be 0.0032 m 3 .s 13.s-1to be 0.0032 m3.s-1
Upaya penyelesaian masalah pemantapan kawasan hutan pada taman nasional di Pulau Sumatera
Full text linkIn the frame of the implementation of good forest management, the certainty of the factually and legally forest area it is needed in order in order to have solid legal foundation. This means the stability on forest boundary areas it is required. This study aimed to carry out scrutiny of the stability of 11 national parks areas in Sumatra, and to recognize the development of stabilization of national parks. The study is conducted in 11 national parks in Sumatra consisting of 7 national parks as conservation forest management unit (CFMU) and 4 parks are not CFMU. The analysis approach used for the research was qualitative descriptive. The results showed that out of 11 national parks only 27.27% which has been structuring the outer boundary from end to end, meanwhile 72.72% have not done. This is because there are some boundaries areas that will be regulated still have problems with the community. Zonation structuring has been conducted by 10 National Park (90.91%) but 1 TN (9.09 have not done the zonation structuring yet). There are some national parks has not been define the boundary properly. Out of number of issues, some efforts that need to be done are to clarify boundary markers on the national parks that can be recognized by all stakeholders, the the acceleration of zone marking and carried out in accordance with the interests of all stakeholders, as well as the need for community involvement in the management of national parks
Crossing Potential of Open Pollination in Cajuputi Seedling Seed Orchard at Paliyan, Gunungkidul
Full text linkThere are two possibilities on open pollination: cross pollination and self pollination. This research was aimed to identify cross pollination potential within and among provenance, and to determine the flowering behavior of each provenance in seedling seed orchard of cajuputi at Paliyan, Gunungkidul. The research was conducted based on flowering phenology (start of flowering, end of flowering and duration of flowering in one period) for all flowering trees during two flowering periods. The result showed that there was high crossing potential in seedling seed orchard of cajuputi based on flowering synchrony. Land race of Gundih has highest crossing potential due to longevity and intensity of flowering, while the provenance from Northern Australia has the lowest crossing potential. Other provenances (Masarete, Rat Gelombeng, Waipirit, Pelita Jaya, Cotonea, Suli and Western Australia) also have high crossing potential at the time when the number of individual was greatest and flowering intensity highest. This research demonstrated that high crossing potential was found within provenance and among provenances except Northern Australia. The implication of this research deployment of improved seed produced from open pollination in seedling seed orchard was recommended for high crossing potential expressed from flowering synchrony
Detection of Water Abundance in Baluran National Park with Landsat Satellite Imagery Analysis
Full text linkIndonesia is one of the mega-biodiversity countries that have a great responsibility in maintaining the balance of the global climate and forest ecosystems. Drought causes shifting of ecosystems causing disturbances on animal life leading to death of species. Alongside fires in the savanna, drought is a recurrent problem in the park, which occurs every year. This study aims to detect the abundance of water by using satellite imagery in Baluran National Park (BNP). The research analyzed using Landsat satellite imagery ETM7 + in 1999 and 2010 and three (3) main factors that have great potential abundance of water, are: (1) plant density (GI = Greenness Index), (2) soil moisture (WI = Wetness Index), and (3) soil conditions (SBI = Soil Brightness Index). Three factors are summed and divided by three to get 5 levels of water abundance: 1) Very abundant, 2) Abundant, 3) Medium, 4) Few, and 5) Very little. The results showed that the abundance of water decreased between 1999 and 2010 for moderate conditions from 85% to 38%, if the abundance of low water (slightly) increased from 15% to 60%. The level of accuracy of the abundance of water in the field of more than 80% is exactly 91%. The extreme drought conditions will be very dangerous for the survival of flora and fauna in Baluran National Park that are in desperate need of water and potentially in danger of a fire. Construction of water reservoirs and water supply continuously using a water tank in the dry season is very necessary in the Baluran National Park