Mangrove forest is one of the forests that has the highest carbon storage in the tropics and is very high compared to the average carbon storage in various other forest types in the world, which contains around 1.023 Mg of carbon per hectare. This study aims to obtain a model for estimating the biomass potential of mangrove forests in Rembang Regency by utilizing Sentinel-2A Satellite imagery and making a map of the distribution of mangrove forest biomass potential through the best equation model. Sampling was done by purposive systematic sampling method. The correlation test results obtained a value of 0.640 which states that there is a strong relationship between biomass and NDVI. Biomass estimation modeling uses equation models namely Linear, Quadratic, Power, and Exponential. Model selection is done by considering several parameters such as R², RMSE, Bias, χ²-hit, SA, and SR. The selected model for estimating mangrove forest biomass potential is the quadratic model ???? = 17.4 -110.2 ???????????????? + 220 ????????????????² with an R² value of 0.474, RMSE value of 51.55, Chi-square test result of 3.46 and has the highest score value. The potential biomass distribution map generated from the selected model consists of 3 classes, namely classes < 3.7 (tons/ha), 3.7-10.5 (tons/ha), 10.5-35.7 (tons/ha). Mangrove forests in Rembang Regency have dominant biomass potential in the 10.5-35.7 (tons/ha) class.
{"title":"Model Penduga Biomassa Hutan Mangrove Menggunakan Citra Satelit Sentinel -2A di Kabupaten Rembang Jawa Tengah","authors":"Ashari Ramadhan, Siman Suwadji","doi":"10.55180/jwt.v13i2.1018","DOIUrl":"https://doi.org/10.55180/jwt.v13i2.1018","url":null,"abstract":"Mangrove forest is one of the forests that has the highest carbon storage in the tropics and is very high compared to the average carbon storage in various other forest types in the world, which contains around 1.023 Mg of carbon per hectare. This study aims to obtain a model for estimating the biomass potential of mangrove forests in Rembang Regency by utilizing Sentinel-2A Satellite imagery and making a map of the distribution of mangrove forest biomass potential through the best equation model. Sampling was done by purposive systematic sampling method. The correlation test results obtained a value of 0.640 which states that there is a strong relationship between biomass and NDVI. Biomass estimation modeling uses equation models namely Linear, Quadratic, Power, and Exponential. Model selection is done by considering several parameters such as R², RMSE, Bias, χ²-hit, SA, and SR. The selected model for estimating mangrove forest biomass potential is the quadratic model ???? = 17.4 -110.2 ???????????????? + 220 ????????????????² with an R² value of 0.474, RMSE value of 51.55, Chi-square test result of 3.46 and has the highest score value. The potential biomass distribution map generated from the selected model consists of 3 classes, namely classes < 3.7 (tons/ha), 3.7-10.5 (tons/ha), 10.5-35.7 (tons/ha). Mangrove forests in Rembang Regency have dominant biomass potential in the 10.5-35.7 (tons/ha) class.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":" 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139619621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The use of unmanned aircraft (UAV) or drones, apart from being used for mapping, can be a solution for quickly obtaining information and carrying out forest inventories with very detailed resolution results. Plantation Monitoring Assessment (PMA) aged 6 months is an initial inventory activity, later the data from PMA 6 will be the basic data for subsequent PMA. So, with drones, it is hoped that satisfactory results will be obtained. Apart from that, drones can be used to count the number of live and dead trees as well as empty spots. This research aims to compare the results of tree calculations directly in the field with the results of drone photos. This research was carried out on 6 month old Eucalyptus pellita plants in compartment A034, Baserah Sector, PT. RAPP. Data collection was carried out using systematic random sampling with a sampling intensity of 1%. The data taken is in the form of data on the number of live and dead/empty plants in the field and photographed with a drone. The test was carried out to test the differences in the number of dead/empty plants directly in the field and calculations using drone photos, namely the t test. The results showed that there was no difference between the number of live and dead/empty plants in the field and from drone photos.
使用无人驾驶飞机 (UAV) 或无人机，除了可用于测绘外，还能快速获取信息，进行森林资源清查，并获得非常详细的分辨率结果。为期 6 个月的人工林监测评估（PMA）是一项初始清查活动，第六次人工林监测评估的数据将成为后续人工林监测评估的基础数据。因此，使用无人机有望获得令人满意的结果。除此之外，无人机还可用于计算活树、枯树和空地的数量。本研究旨在将直接在实地计算树木的结果与无人机拍摄的结果进行比较。本研究对 PT.RAPP。数据收集采用系统随机抽样法，抽样密度为 1%。采集的数据形式为田间活株和死株/空株的数量，并用无人机拍摄。为检验直接在田间拍摄的死亡/空洞植物数量与使用无人机拍摄的计算结果之间的差异，进行了检验，即 t 检验。结果表明，在田间拍摄和使用无人机拍摄的死亡/空株数量没有差异。
{"title":"Pemantauan Jumlah Batang Eucalyptus pellita Umur 6 Bulan Berdasarkan Hasil Foto Drone","authors":"Sugeng Wahyudiono, Tati Suhartati, Yudi Fakultas, Kehutanan Institut, Pertanian Stiper","doi":"10.55180/jwt.v13i2.966","DOIUrl":"https://doi.org/10.55180/jwt.v13i2.966","url":null,"abstract":"The use of unmanned aircraft (UAV) or drones, apart from being used for mapping, can be a solution for quickly obtaining information and carrying out forest inventories with very detailed resolution results. Plantation Monitoring Assessment (PMA) aged 6 months is an initial inventory activity, later the data from PMA 6 will be the basic data for subsequent PMA. So, with drones, it is hoped that satisfactory results will be obtained. Apart from that, drones can be used to count the number of live and dead trees as well as empty spots. This research aims to compare the results of tree calculations directly in the field with the results of drone photos. This research was carried out on 6 month old Eucalyptus pellita plants in compartment A034, Baserah Sector, PT. RAPP. Data collection was carried out using systematic random sampling with a sampling intensity of 1%. The data taken is in the form of data on the number of live and dead/empty plants in the field and photographed with a drone. The test was carried out to test the differences in the number of dead/empty plants directly in the field and calculations using drone photos, namely the t test. The results showed that there was no difference between the number of live and dead/empty plants in the field and from drone photos.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139528264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Kusumaningsih, Didik Surya Hadi, Agnestya Erica Sebriliani
Eusideroxylon zwageri wood is a type of wood wich have high natural durability that contains extractive compounds such as alkaloids, tannins, saponins, flavonoids, and phenolics that are toxic to wood-destroying organisms. The ironwood sawmill industry produces waste in the form of sawdust that has not been used but only disposed of into the environment. Therefore, that wood sawdust waste can be used as a natural wood preservative to preserve wood whish have low natural durability such as Anthocephalus cadamba. In this study, A. cadamba wood preservation was carried out with irondust extract with various solution formulas, namely 5%, 10%. 15% and 20%. The purpose of this study was to know the effect of irondust extract solution formula as a preservative on the results of jabon wood preservation which includes absorption and retention of preservatives, mortality of dry wood termites, and the percentage of weight reduction of test samples after being fed to dry wood termites. The results of this research showed that the irondust extract solution formula had a significant effect on the absorption and retention of preservatives and the mortality of dry wood termites. The 20% irondust extract solution formula resulted in a higher preservative retention and drywood termite mortality value than the 5%, 10% and 15% solution formula, which was 12.13 Kg/m3 for retention and 88% for drywood termite mortality.
{"title":"Pemanfaatan Limbah Kayu Ulin (Eusideroxylon zwageri) sebagai Bahan Pengawet untuk Mencegah Serangan Rayap Kayu Kering pada Kayu Jabon (Anthocephalus cadamba)","authors":"K. Kusumaningsih, Didik Surya Hadi, Agnestya Erica Sebriliani","doi":"10.55180/jwt.v13i2.968","DOIUrl":"https://doi.org/10.55180/jwt.v13i2.968","url":null,"abstract":"Eusideroxylon zwageri wood is a type of wood wich have high natural durability that contains extractive compounds such as alkaloids, tannins, saponins, flavonoids, and phenolics that are toxic to wood-destroying organisms. The ironwood sawmill industry produces waste in the form of sawdust that has not been used but only disposed of into the environment. Therefore, that wood sawdust waste can be used as a natural wood preservative to preserve wood whish have low natural durability such as Anthocephalus cadamba. In this study, A. cadamba wood preservation was carried out with irondust extract with various solution formulas, namely 5%, 10%. 15% and 20%. The purpose of this study was to know the effect of irondust extract solution formula as a preservative on the results of jabon wood preservation which includes absorption and retention of preservatives, mortality of dry wood termites, and the percentage of weight reduction of test samples after being fed to dry wood termites. The results of this research showed that the irondust extract solution formula had a significant effect on the absorption and retention of preservatives and the mortality of dry wood termites. The 20% irondust extract solution formula resulted in a higher preservative retention and drywood termite mortality value than the 5%, 10% and 15% solution formula, which was 12.13 Kg/m3 for retention and 88% for drywood termite mortality.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"8 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139529967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aek Natonang Arboretum Ecotourism in Samosir Regency, North Sumatra Province has natural beauty that can be used as a tourist attraction for every visitor. The natural beauty that is owned in reality is not calculated into economic value or market value, so it is important to do economic valuation. By doing this research, it can be known the characteristics of visitors, the amount of economic value of Aek Natonang Arboretum ecotourism based on the travel cost method and find out the factors that influence the intensity of visits. The economic valuation method used is the travel cost method. The travel cost method is applied to estimate the economic value of Aek Natonang Arboretum ecotourism by calculating the cost of travel expenses. Data on travel costs and the number of visits were collected through interviews using questionnaires to visitors within a certain period of time. Then proceed with multiple linear regression analysis to determine the factors that affect the intensity of ecotourism visits to Aek Natonang Arboretum. The results of economic valuation with the travel cost method obtained an average value of Rp238.170,00/visit and the economic value of Aek Natonang Arboretum ecotourism is Rp2.358.359.340,00/year. Factors that influence the intensity of visits are distance, length of travel and travel costs.
{"title":"Valuasi Ekonomi Ekowisata Arboretum Aek Natonang Kecamatan Simanindo Kabupaten Samosir Provinsi Sumatera Utara dengan Pendekatan Travel Cost Method","authors":"Devi Fransiska Saragih, Hastanto Bowo Woesono, M. Darul, Falah Fakultas, Kehutanan Institut, Pertanian Stiper","doi":"10.55180/jwt.v13i2.1020","DOIUrl":"https://doi.org/10.55180/jwt.v13i2.1020","url":null,"abstract":"Aek Natonang Arboretum Ecotourism in Samosir Regency, North Sumatra Province has natural beauty that can be used as a tourist attraction for every visitor. The natural beauty that is owned in reality is not calculated into economic value or market value, so it is important to do economic valuation. By doing this research, it can be known the characteristics of visitors, the amount of economic value of Aek Natonang Arboretum ecotourism based on the travel cost method and find out the factors that influence the intensity of visits. The economic valuation method used is the travel cost method. The travel cost method is applied to estimate the economic value of Aek Natonang Arboretum ecotourism by calculating the cost of travel expenses. Data on travel costs and the number of visits were collected through interviews using questionnaires to visitors within a certain period of time. Then proceed with multiple linear regression analysis to determine the factors that affect the intensity of ecotourism visits to Aek Natonang Arboretum. The results of economic valuation with the travel cost method obtained an average value of Rp238.170,00/visit and the economic value of Aek Natonang Arboretum ecotourism is Rp2.358.359.340,00/year. Factors that influence the intensity of visits are distance, length of travel and travel costs.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":" 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139622844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Another Components simple agroforestry at Widodomartani ngemplak sleman yogyakarta indonesia is Cassava. Cassava for food can increase value economic with feed silkmoth samia ricini. The background that thus will sericulture Samia ricini. The aims research were to determine time and product sericulture samia ricini. The method research with sericulture samia ricini. The leaves cassava for feed samia ricini. The data collection on the time for feed, percentage life larvae until coccon, time results coccon, brieght coccon producted. The material researchers, larva Samia ricini 11 th day from 1 gr egg Samia ricini, the leaves cassava edibled and cassava karet non edible, with before feed leaves ricinus comunis. Samia ricini culture used silkmoth rearing rack. Results of the research showed that ecdysis procces 15 th day, after ecdysis increases actifity feeding very high until 21th day. Start coccon 22th day until 26th day the end larva last feeding leaves. The life percentage 95,87 %, feed cassava edible 94,89 %, an ond feed cassava non edible 96,53 %. The coccon producted start 22th day until 26th day , with weight rate coccon cassava edible 2.10264 gr, cassava non edible 2.109893 gr.
{"title":"Budidaya Ulat Sutera Daun Singkong Hasil Agroforestry Sederhana di Widodomartani Ngemplak Sleman Yogyakarta Indonesia","authors":"Agus Prijono, Rawana, Yunianto Hargo Nugroho","doi":"10.55180/jwt.v13i2.967","DOIUrl":"https://doi.org/10.55180/jwt.v13i2.967","url":null,"abstract":"Another Components simple agroforestry at Widodomartani ngemplak sleman yogyakarta indonesia is Cassava. Cassava for food can increase value economic with feed silkmoth samia ricini. The background that thus will sericulture Samia ricini. The aims research were to determine time and product sericulture samia ricini. The method research with sericulture samia ricini. The leaves cassava for feed samia ricini. The data collection on the time for feed, percentage life larvae until coccon, time results coccon, brieght coccon producted. The material researchers, larva Samia ricini 11 th day from 1 gr egg Samia ricini, the leaves cassava edibled and cassava karet non edible, with before feed leaves ricinus comunis. Samia ricini culture used silkmoth rearing rack. Results of the research showed that ecdysis procces 15 th day, after ecdysis increases actifity feeding very high until 21th day. Start coccon 22th day until 26th day the end larva last feeding leaves. The life percentage 95,87 %, feed cassava edible 94,89 %, an ond feed cassava non edible 96,53 %. The coccon producted start 22th day until 26th day , with weight rate coccon cassava edible 2.10264 gr, cassava non edible 2.109893 gr.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":" 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139621250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The use of wood harvesting equipment greatly helps the company to achieve the goals, namely: (1) speed up the process of carrying out work; (2) carrying out the kind of work that cannot be done by human labor; and (3) it is done for reasons of efficiency, limited labor, security and economic factors. Therefore, in order for the goal to be achieved, it is necessary to choose tools that are appropriate, economical and in accordance with working conditions. The selection of inappropriate tools can result in not achieving the expected goals and can cause damage to the tool itself. In the process of logging carried out at PT. RAPP on fully mechanical and semi-mechanical systems uses different logging tools. Each tool in logging activities has its own disadvantages and advantages. So it is necessary to conduct research on comparing the productivity and efficiency of logging using chainsaws and excavator attachment tree shear on Eucalyptus sp plants. Based on the results of the test analysis conducted, the average chainsaw productivity of STIHL MS 382 was 11.32 m³ / hour smaller than the productivity of excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In " of 27.34 m³ / hour. As for the average operational cost of the STIHL MS 382 chainsaw of Rp. 7,043/m³ smaller than excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In" of Rp. 11.541/ m³.
木材采伐设备的使用极大地帮助公司实现了目标，即:(1)加快了开展工作的进程;(二)从事人力不能从事的劳动的;(3)出于效率、劳动力有限、安全和经济等因素的考虑。因此，为了实现目标，必须选择合适、经济、符合工作条件的刀具。选择不合适的工具可能导致无法达到预期的目标，并可能对工具本身造成损害。在PT、RAPP全机械和半机械系统的测井过程中，采用了不同的测井工具。日志记录活动中的每种工具都有自己的缺点和优点。因此，有必要对链锯采伐桉树和挖掘机附着采伐桉树的生产率和采伐效率进行比较研究。根据试验分析结果，STIHL MS 382型电锯的平均生产率比KOBELCO SK-130 HD型挖掘机的27.34 m³/小时低11.32 m³/小时。STIHL MS 382链锯的平均运营成本为7,043卢比/m³，比配备附加树切割机Dymax 14 In”的KOBELCO SK-130 HD挖掘机的平均运营成本为11.541卢比/m³小。
{"title":"Study Produktivitas dan Perbandingan Produktivitas dan Efisiensi Kegiatan Penebangan Mekanis Tanaman Eucalyptus sp. Di Hutan Tanaman Industri","authors":"Santo Wibowo Lumban Gaol, Siman Suwadji, Hastanto Bowo Woesono","doi":"10.55180/jwt.v13i1.509","DOIUrl":"https://doi.org/10.55180/jwt.v13i1.509","url":null,"abstract":"The use of wood harvesting equipment greatly helps the company to achieve the goals, namely: (1) speed up the process of carrying out work; (2) carrying out the kind of work that cannot be done by human labor; and (3) it is done for reasons of efficiency, limited labor, security and economic factors. Therefore, in order for the goal to be achieved, it is necessary to choose tools that are appropriate, economical and in accordance with working conditions. The selection of inappropriate tools can result in not achieving the expected goals and can cause damage to the tool itself. In the process of logging carried out at PT. RAPP on fully mechanical and semi-mechanical systems uses different logging tools. Each tool in logging activities has its own disadvantages and advantages. So it is necessary to conduct research on comparing the productivity and efficiency of logging using chainsaws and excavator attachment tree shear on Eucalyptus sp plants. Based on the results of the test analysis conducted, the average chainsaw productivity of STIHL MS 382 was 11.32 m³ / hour smaller than the productivity of excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In \" of 27.34 m³ / hour. As for the average operational cost of the STIHL MS 382 chainsaw of Rp. 7,043/m³ smaller than excavator KOBELCO SK-130 HD with attachman tree shear Dymax 14 In\" of Rp. 11.541/ m³.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"191 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122435928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Agus Prijono, Yuslinawari Fakultas, Kehutanan Institut, Pertanian Stiper
The Nursery Department is the department responsible for ensuring the success of Acacia crassicarpa plants at an early stage by caring for and maintaining the quality and quantity of the seeds before planting them in the planting area. One of the disturbances that threatens the quality and quantity of seed production is the presence of Thrips sp. pest attacks. One of the Thrips sp. pest control techniques. with the application of insecticides with appropriate surfactants. Therefore, it is necessary to test various surfactants on Tenchu 20 SG insecticides which are appropriate in tackling Thrips sp. pest attacks. This study aims to determine the most appropriate surfactant in the Tenchu 20 SG insecticide in tackling Thrips sp. which attacks the mother plant Acacia crassicarpa. This research was conducted using a completely randomized design (CRD) with Least Significant Difference (LSD) follow-up test. The number of treatments in this study consisted of 5 treatments where each complete treatment with 3 repetitions used 72 sample plants so that the total sample plants used were 360 plants. The parameters observed were the incidence and severity of Thrips sp.. The results showed that there was a decrease in the incidence and severity of Thrips sp. the largest is the type of Ronstick surfactant. The incidence rate and severity of Thrips sp. before application, namely 100% while after application, the incidence rate of Thrips sp. that is equal to 66.67% and the severity of Thrips sp. that is equal to 38.43%.
{"title":"Uji Efektivitas Berbagai Surfaktan pada Insektisida Tenchu dalam Menanggulangi Hama Thrips sp. pada Tanaman Induk Acacia crassicarpa di Rumah Tanaman Induk Kerinci Central Nursery 1 East","authors":"Agus Prijono, Yuslinawari Fakultas, Kehutanan Institut, Pertanian Stiper","doi":"10.55180/jwt.v13i1.518","DOIUrl":"https://doi.org/10.55180/jwt.v13i1.518","url":null,"abstract":"The Nursery Department is the department responsible for ensuring the success of Acacia crassicarpa plants at an early stage by caring for and maintaining the quality and quantity of the seeds before planting them in the planting area. One of the disturbances that threatens the quality and quantity of seed production is the presence of Thrips sp. pest attacks. One of the Thrips sp. pest control techniques. with the application of insecticides with appropriate surfactants. Therefore, it is necessary to test various surfactants on Tenchu 20 SG insecticides which are appropriate in tackling Thrips sp. pest attacks. This study aims to determine the most appropriate surfactant in the Tenchu 20 SG insecticide in tackling Thrips sp. which attacks the mother plant Acacia crassicarpa. This research was conducted using a completely randomized design (CRD) with Least Significant Difference (LSD) follow-up test. The number of treatments in this study consisted of 5 treatments where each complete treatment with 3 repetitions used 72 sample plants so that the total sample plants used were 360 plants. The parameters observed were the incidence and severity of Thrips sp.. The results showed that there was a decrease in the incidence and severity of Thrips sp. the largest is the type of Ronstick surfactant. The incidence rate and severity of Thrips sp. before application, namely 100% while after application, the incidence rate of Thrips sp. that is equal to 66.67% and the severity of Thrips sp. that is equal to 38.43%.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"218 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128865861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Asmin Tropical Rain Forest Conservation 2 is a tropical natural forest which is a conservation area of PT Asmin Bronang Kapuas, Central Kalimantan. The designation of new areas was carried out in 2018 and there was no research in the area that required data collection on the types of constituents of the area. The purposes of this research were to determine species composition, species diversity index, species evenness index, species richness index, and species dominance index. The method used in this study was collecting data on plants in area of 54.6 hectares with a sampling intensity of 1% using the Uniform Systematic Distribution Sampling with Random Start pattern. There are 14 plots in the form of nested samples with designations for 4 levels of plants (seedlings, saplings, poles, and trees). Results of the research showed that vegetation species composition was dominated by Shorea smithiana (Mahambung) of the Dipterocarpaceae family. Shorea parvifolia (Red Meranti), Euzyderoxylon zwageri (Ulin), Shorea smithiana (Mahambung), Mezzetia parviflora (Pisang-pisang), Syzygium spp. (Jambu-jambu), and Memecylon sumatrense (Kamasulan) are the 6 species that have the best regeneration rate, which are found at all plant levels. The highest IVI was Shorea smithiana (Mahambung) at the seedling was 46.55, pole 55.68, and tree 32.02 levels. At the sapling level, the highest IVI was Baccaurea bracteata Muell (Rambai forest) was 28.76. The species diversity index from seedling to pole level was moderate. At the tree level, the species diversity index was high (3.23). Species evenness index from seedling to tree level including height (0.82-0.92). The species richness index from seedling to pole was moderate. At the tree level, the species diversity index was high (7.45). The species dominance index of all levels was included in the low category (0.05-0.15).
{"title":"Analisis Vegetasi Penyusun Asmin Tropical Rain Forest Conservation 2, PT. Asmin Bara Bronang, Kapuas, Kalimantan Tengah","authors":"S. Budi, Agus Prijono, K. Kusumaningsih","doi":"10.55180/jwt.v13i1.600","DOIUrl":"https://doi.org/10.55180/jwt.v13i1.600","url":null,"abstract":"Asmin Tropical Rain Forest Conservation 2 is a tropical natural forest which is a conservation area of PT Asmin Bronang Kapuas, Central Kalimantan. The designation of new areas was carried out in 2018 and there was no research in the area that required data collection on the types of constituents of the area. The purposes of this research were to determine species composition, species diversity index, species evenness index, species richness index, and species dominance index. The method used in this study was collecting data on plants in area of 54.6 hectares with a sampling intensity of 1% using the Uniform Systematic Distribution Sampling with Random Start pattern. There are 14 plots in the form of nested samples with designations for 4 levels of plants (seedlings, saplings, poles, and trees). Results of the research showed that vegetation species composition was dominated by Shorea smithiana (Mahambung) of the Dipterocarpaceae family. Shorea parvifolia (Red Meranti), Euzyderoxylon zwageri (Ulin), Shorea smithiana (Mahambung), Mezzetia parviflora (Pisang-pisang), Syzygium spp. (Jambu-jambu), and Memecylon sumatrense (Kamasulan) are the 6 species that have the best regeneration rate, which are found at all plant levels. The highest IVI was Shorea smithiana (Mahambung) at the seedling was 46.55, pole 55.68, and tree 32.02 levels. At the sapling level, the highest IVI was Baccaurea bracteata Muell (Rambai forest) was 28.76. The species diversity index from seedling to pole level was moderate. At the tree level, the species diversity index was high (3.23). Species evenness index from seedling to tree level including height (0.82-0.92). The species richness index from seedling to pole was moderate. At the tree level, the species diversity index was high (7.45). The species dominance index of all levels was included in the low category (0.05-0.15).","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"34 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123053039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Tati Suhartati, Sugeng Wahyudiono, Michael, Fakultas Kehutanan
Inventory on Plantation Monitoring Assessment (PMA) Eucalyptus pellita at the aged of 30 months, measuring total height (h) and diameter at breast height (dbh). Height measurements were done using the Vertex. Measuring the total height of a tree whose crown has started to close (overlap) requires more time to find the highest point of the tree, it is necessary to overcome it with a tool that is a height estimator model through the relationship between height and diameter at breast height (h-dbh). The study was conducted using two compartments of Eucalyptus pellita stands at the aged of 30 months. Sampling conducted by Systematic Sampling with Random Start. The data measured were total height (h) and diameter at breast height (dbh). Simple linear regression modeling h-dbh compiled for each compartment then carried out a goodness of fit test and validation using the Bias, SA and SR values, after that the regression line similarity was tested. The results showed that the two compartments have regression equations with the same slope and intercept, so that the two compartments can be threated as one dataset and the total height in the two compartments studied can be estimated using the equation h = 6,968 + 0,844 dbh.
{"title":"Pemodelan Hubungan Tinggi dan Diameter Eucalyptus pellita Umur 30 Bulan","authors":"Tati Suhartati, Sugeng Wahyudiono, Michael, Fakultas Kehutanan","doi":"10.55180/jwt.v13i1.596","DOIUrl":"https://doi.org/10.55180/jwt.v13i1.596","url":null,"abstract":"Inventory on Plantation Monitoring Assessment (PMA) Eucalyptus pellita at the aged of 30 months, measuring total height (h) and diameter at breast height (dbh). Height measurements were done using the Vertex. Measuring the total height of a tree whose crown has started to close (overlap) requires more time to find the highest point of the tree, it is necessary to overcome it with a tool that is a height estimator model through the relationship between height and diameter at breast height (h-dbh). The study was conducted using two compartments of Eucalyptus pellita stands at the aged of 30 months. Sampling conducted by Systematic Sampling with Random Start. The data measured were total height (h) and diameter at breast height (dbh). Simple linear regression modeling h-dbh compiled for each compartment then carried out a goodness of fit test and validation using the Bias, SA and SR values, after that the regression line similarity was tested. The results showed that the two compartments have regression equations with the same slope and intercept, so that the two compartments can be threated as one dataset and the total height in the two compartments studied can be estimated using the equation h = 6,968 + 0,844 dbh.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131036676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The usage in the types of wood as the raw material of industry should be appropriate with the basic nature of wood in order to produce the forest’s product with good quality. This research was aimed to : 1) learn the relationship between the different parts of wood and the treatment of surface toward glue’s nature of sengon wood and find out the factors that were most influenced, 2) Handle the weak of glue’s strength because of the influence in a part of gubal and teras wood with the treatment of the surface. The design of this research used the factorial experiment arranged in the design of completely random, with the continuing Turkey test. The factor used in this research consisted of part of the wood (gubal and teras wood) and the treatment of the surface (without treatment, NaOH, ethanol, and alcohol bensen). The observed parameter included the density, the glue’s strength, and the damage to wood because of dry and wet air. The result of this research indicated glue’s nature was really most influenced by the part of the wood and the treatment of the surface. The average rate in the best nature of glue for sengon wood was produced in the part of teras wood, namely the glue’s strength in the dry air, the wood damage in dry air, the strength of wet glue, the damage of wet wood were 42,50 kg/cm2, 80,25 %, 23,61 kg/cm2, 44,92. The average rate in the best nature of glue for sengon wood was produced in the treatment of alcohol bensen, namely the glue’s strength in dry air, the wood damage on dry air, the strength of wet glue, and the damage of wet glue were 43,47 kg/cm2, 87,513 %, 24,375 kg/cm2, and 48,62 %.
{"title":"Perbaikan Sifat Perekatan Kayu Sengon dengan Perlakuan Permukaan","authors":"Sushardi, Hastanto Bowo Woesono, Didik Surya Hadi","doi":"10.55180/jwt.v13i1.595","DOIUrl":"https://doi.org/10.55180/jwt.v13i1.595","url":null,"abstract":"The usage in the types of wood as the raw material of industry should be appropriate with the basic nature of wood in order to produce the forest’s product with good quality. This research was aimed to : 1) learn the relationship between the different parts of wood and the treatment of surface toward glue’s nature of sengon wood and find out the factors that were most influenced, 2) Handle the weak of glue’s strength because of the influence in a part of gubal and teras wood with the treatment of the surface. The design of this research used the factorial experiment arranged in the design of completely random, with the continuing Turkey test. The factor used in this research consisted of part of the wood (gubal and teras wood) and the treatment of the surface (without treatment, NaOH, ethanol, and alcohol bensen). The observed parameter included the density, the glue’s strength, and the damage to wood because of dry and wet air. The result of this research indicated glue’s nature was really most influenced by the part of the wood and the treatment of the surface. The average rate in the best nature of glue for sengon wood was produced in the part of teras wood, namely the glue’s strength in the dry air, the wood damage in dry air, the strength of wet glue, the damage of wet wood were 42,50 kg/cm2, 80,25 %, 23,61 kg/cm2, 44,92. The average rate in the best nature of glue for sengon wood was produced in the treatment of alcohol bensen, namely the glue’s strength in dry air, the wood damage on dry air, the strength of wet glue, and the damage of wet glue were 43,47 kg/cm2, 87,513 %, 24,375 kg/cm2, and 48,62 %.","PeriodicalId":426857,"journal":{"name":"Jurnal Wana Tropika","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114324155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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