Strong winds that occur can damage the Eucalyptus pellita plant thereby reducing wood production at the end of the rotation. Biometric characteristics are very important to predict the criteria for trees that are at risk of damage due to wind. This study aims to determine the biometric characteristics that play a role in the risk of trees being damaged by wind. The study was conducted on Eucalyptus pellita aged 5 years. The biometric characteristics studied consisted of diameter at breast height (DBH), total height (H) and crown length (CL) as well as the ratio of H/DBH (slenderness inde)x and CL/H (percentage of crown). Binary logistic regression analysis was used to analyized the probability of tree damage due to wind. The results showed that the regression model with the independent variable H/DBH was a suitable model. The H/DBH ratio or tree slenderness index is a biometric characteristic that contributes 11,4% to explain the risk of wind damage. Keywords: binary logistic regression ; percentage of crown; slenderness index
{"title":"Hubungan Karakteristik Biometrik Eucalytus pellita Terhadap Kerusakan Karena Angin","authors":"Tati Suhartati, Sugeng Wahyudiono, Ricky Ricky","doi":"10.36873/jht.v17i1.4440","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4440","url":null,"abstract":"Strong winds that occur can damage the Eucalyptus pellita plant thereby reducing wood production at the end of the rotation. Biometric characteristics are very important to predict the criteria for trees that are at risk of damage due to wind. This study aims to determine the biometric characteristics that play a role in the risk of trees being damaged by wind. The study was conducted on Eucalyptus pellita aged 5 years. The biometric characteristics studied consisted of diameter at breast height (DBH), total height (H) and crown length (CL) as well as the ratio of H/DBH (slenderness inde)x and CL/H (percentage of crown). Binary logistic regression analysis was used to analyized the probability of tree damage due to wind. The results showed that the regression model with the independent variable H/DBH was a suitable model. The H/DBH ratio or tree slenderness index is a biometric characteristic that contributes 11,4% to explain the risk of wind damage. \u0000 \u0000Keywords: binary logistic regression ; percentage of crown; slenderness index","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"1 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86242831","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}
Canra P. Lumban Gaol, W. Wahyudi, Santosa Yulianto
This study aims to determine the structure, composition and growth of vegetation on peatlands burned in 2015 in the Natural Laboratory of Peat Forest (LAHG) Sebangau. The benefit of the research is to provide information on the structure, composition and growth of burned peat forest vegetation.Data retrieval using the checkered line method. Determination of the path with the technique of "Stratified Sampling" with a track area of 3 ha.The results of the analysis of the horizontal structure of the stand resemble an inverted J curve. The rehabilitated and non-rehabilitated areas changed the structure to large diameter classes. The vertical structure of the stand forms an inverted J curve although it is less consistent in the mid-height class. The burned area and not rehabilitated the structure changed in the largest diameter class. The rehabilitated burned area underwent changes in the form of improvements in the number and composition of species in the high-middle class due to rehabilitation activities. The highest Important Value Index (INP) in burned areas was (Combretocarpus rotundatus (Miq) at each growth stage, different for unburned areas the highest INP were (Syzygium sp.) seedlings and poles, sapling level (Garcinia bancana) and tree level (Syzygium sp.) Syzygium sp.).The composition of the rehabilitated area consisted of 12 types of seedlings, 8 types of saplings. The area that was not rehabilitated contained 11 types of seedlings, 13 types of saplings, 4 types of poles and 3 types of trees. The unburnt area contained 21 types of seedlings, 28 types of saplings, 26 types of poles and 23 types of trees. Species diversity and species richness in the burned areas are low, while the unburned forest areas are classified as medium and high. The evenness of species in the three forest conditions was high and evenly distributed. The highest vegetation growth in the rehabilitated area on the BFA transect was (Shorea balangeran (Korth.) Burck), while the slowest growth was (Eleocarpus sp.). On the CN transect, the highest vegetation growth was found in (Syzygium sp.) and the lowest growth was (Shorea balangeran (Korth.).
{"title":"Struktur, Komposisi dan Pertumbuhan Vegetasi pada Lahan Gambut Bekas Terbakar Tahun 2015 Di UPT Laboratorium Alam Hutan Gambut Sebangau","authors":"Canra P. Lumban Gaol, W. Wahyudi, Santosa Yulianto","doi":"10.36873/jht.v17i1.4399","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4399","url":null,"abstract":"This study aims to determine the structure, composition and growth of vegetation on peatlands burned in 2015 in the Natural Laboratory of Peat Forest (LAHG) Sebangau. The benefit of the research is to provide information on the structure, composition and growth of burned peat forest vegetation.Data retrieval using the checkered line method. Determination of the path with the technique of \"Stratified Sampling\" with a track area of 3 ha.The results of the analysis of the horizontal structure of the stand resemble an inverted J curve. The rehabilitated and non-rehabilitated areas changed the structure to large diameter classes. The vertical structure of the stand forms an inverted J curve although it is less consistent in the mid-height class. The burned area and not rehabilitated the structure changed in the largest diameter class. The rehabilitated burned area underwent changes in the form of improvements in the number and composition of species in the high-middle class due to rehabilitation activities. The highest Important Value Index (INP) in burned areas was (Combretocarpus rotundatus (Miq) at each growth stage, different for unburned areas the highest INP were (Syzygium sp.) seedlings and poles, sapling level (Garcinia bancana) and tree level (Syzygium sp.) Syzygium sp.).The composition of the rehabilitated area consisted of 12 types of seedlings, 8 types of saplings. The area that was not rehabilitated contained 11 types of seedlings, 13 types of saplings, 4 types of poles and 3 types of trees. The unburnt area contained 21 types of seedlings, 28 types of saplings, 26 types of poles and 23 types of trees. Species diversity and species richness in the burned areas are low, while the unburned forest areas are classified as medium and high. The evenness of species in the three forest conditions was high and evenly distributed. The highest vegetation growth in the rehabilitated area on the BFA transect was (Shorea balangeran (Korth.) Burck), while the slowest growth was (Eleocarpus sp.). On the CN transect, the highest vegetation growth was found in (Syzygium sp.) and the lowest growth was (Shorea balangeran (Korth.).","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"446 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78260705","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}
Forest and land fires in Palangka Raya City are events that almost occur every year during the dry season, forest and land fires in 2015 were recorded as one of the worst incidents in recent years. Fires in Palangka Raya City during the period January – August 2019 reached approximately 1222 hectares. The aim of the researcher to load the spatial data above is to help complete the data and be a reference in researching the spatial characteristics of the 2019 MODIS hotspot data in Palangka Raya City by examining the spatial characteristics of the MODIS hotspot data to predict forest and land fires, as well as to provide the latest information on hotspots. hotspots and the location of hotspots that need to be watched out for. The method used in this study is a combination of spatial analysis and fieldwork to obtain an overview of the spatial characteristics of the spatial data. The results of this study show that the distribution of MODIS hotspots in 2019 in the city of Palangka Raya is highest in the Sabangau sub-district while the lowest is in the Bukit Batu sub-district, with high and medium confidence levels, during a prolonged dry season and due to land clearing activities by burning. The characteristics of the MODIS hotspot in the city of Palangka Raya have 21 spatial characteristics in general consisting of vegetation types in the form of broadleaf acacia plants at sapling level, shrubs, conversion of agricultural land, and housing with road, river and peat distribution accessibility in the city of Palangka Raya.
{"title":"Karakteristik Spasial Data Hotspot MODIS Tahun 2019 Di Kota Palangka Raya Provinsi Kalimantan Tengah","authors":"Andreas Pinem, Santosa Yulianto, Rini Dwiastuti","doi":"10.36873/jht.v17i1.4442","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4442","url":null,"abstract":"Forest and land fires in Palangka Raya City are events that almost occur every year during the dry season, forest and land fires in 2015 were recorded as one of the worst incidents in recent years. Fires in Palangka Raya City during the period January – August 2019 reached approximately 1222 hectares. The aim of the researcher to load the spatial data above is to help complete the data and be a reference in researching the spatial characteristics of the 2019 MODIS hotspot data in Palangka Raya City by examining the spatial characteristics of the MODIS hotspot data to predict forest and land fires, as well as to provide the latest information on hotspots. hotspots and the location of hotspots that need to be watched out for. The method used in this study is a combination of spatial analysis and fieldwork to obtain an overview of the spatial characteristics of the spatial data. The results of this study show that the distribution of MODIS hotspots in 2019 in the city of Palangka Raya is highest in the Sabangau sub-district while the lowest is in the Bukit Batu sub-district, with high and medium confidence levels, during a prolonged dry season and due to land clearing activities by burning. The characteristics of the MODIS hotspot in the city of Palangka Raya have 21 spatial characteristics in general consisting of vegetation types in the form of broadleaf acacia plants at sapling level, shrubs, conversion of agricultural land, and housing with road, river and peat distribution accessibility in the city of Palangka Raya.","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"25 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90908417","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}
Untuk mendukung upaya Pemerintah Kabupaten Gunung Mas dalam mewujudkan smart tourism maka dilakukan pembangunan kepariwisataan berkelanjutan. Desa Hurung Bunut ditetapkan sebagai desa wisata tahun 2016 dan dianggap perlu untuk mensinergikan 3 (tiga) smart yaitu, smart Agro, smart Tourism dan smart Human resources. Penelitian ini bertujuan untuk mengidentifikasi potensi serta variable dan kriteria dalam pengembangan Agrowisata Di Desa Hurung Bunut. Metode yang digunakan pada pada pengembangan agrowisata ini yaitu metode kualilatif dengan pendekatan deskriptif, beberapa tahapan proses penelitian antara lain: a) teknik pengumpulan data, b) studi literatur, c) studi preseden, dan d) teknik analisis. pengembangan agrowisata Desa Hurung Bunut diharapkan: a) membantu para petani dan masyarakat umum dalam belajar pengolahan sumber daya alam, b) sarana penyatu antara pengunjung dengan masyarakat, c) mewadahi petani dan masyarakat luar yang ingin berlatih dan belajar tentang perlunya suatu pelestarian lingkungan, d) memperkenalkan kesenian serta kebudayaan lokal penduduk setempat kepada masyarakat luar. Pengembangan Agrowisata yang ada di Desa Hurung Bunut merupakan pelestarian lingkungan alam dan arsitektur lokal yang dapat menjamin keharmonisan antara lokasi bangunan dan lingkungannya
{"title":"Potensi Pengembangan Agrowisata Di Desa Hurung Bunut, Kabupaten Gunung Mas","authors":"Vinolia Florensa, Noor Hamidah","doi":"10.36873/jht.v17i1.4400","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4400","url":null,"abstract":"Untuk mendukung upaya Pemerintah Kabupaten Gunung Mas dalam mewujudkan smart tourism maka dilakukan pembangunan kepariwisataan berkelanjutan. Desa Hurung Bunut ditetapkan sebagai desa wisata tahun 2016 dan dianggap perlu untuk mensinergikan 3 (tiga) smart yaitu, smart Agro, smart Tourism dan smart Human resources. Penelitian ini bertujuan untuk mengidentifikasi potensi serta variable dan kriteria dalam pengembangan Agrowisata Di Desa Hurung Bunut. Metode yang digunakan pada pada pengembangan agrowisata ini yaitu metode kualilatif dengan pendekatan deskriptif, beberapa tahapan proses penelitian antara lain: a) teknik pengumpulan data, b) studi literatur, c) studi preseden, dan d) teknik analisis. pengembangan agrowisata Desa Hurung Bunut diharapkan: a) membantu para petani dan masyarakat umum dalam belajar pengolahan sumber daya alam, b) sarana penyatu antara pengunjung dengan masyarakat, c) mewadahi petani dan masyarakat luar yang ingin berlatih dan belajar tentang perlunya suatu pelestarian lingkungan, d) memperkenalkan kesenian serta kebudayaan lokal penduduk setempat kepada masyarakat luar. Pengembangan Agrowisata yang ada di Desa Hurung Bunut merupakan pelestarian lingkungan alam dan arsitektur lokal yang dapat menjamin keharmonisan antara lokasi bangunan dan lingkungannya","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"73 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84387972","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 carbon content in trees is affected by the amount of tree biomass. The value of the biomass content of the tree indicate to the value the carbon content. It is interest to study of the growth rate of seedlings and learn to carbon and biomass distributions. This aims of the study is to know the level of carbon distribution of Manggis, Lengkeng, Sengon and Jelutung seedlings. The samples of selected seedlings were removed (destructive method). The roots washed by water to remove the sticky soil. The samples dried for 1 day, dried with a temperature of 102 ± 30C to constant weight. Samples that have dried out are separated by organs (roots, stems and leaves), to measure the weight of biomass. Method of calculating carbon by ash of biomass for calculating carbon percentages. The percentage of carbon multiplied by the calculation of biomass to calculate carbon. The results of the study show that the Lengkeng (14.10 g) seedlings have the higher value of carbon, than Manggis (5.14 g), Jelutung (3.80 g), Sengon (2.01 g), respectively. The distribution of carbon in seedling organs of the seedling level were varies. Jelutung and Lengkeng seedlings were higher value of carbon distribution in stem, than the roots, the leaves, respectively. Sengon seedlings have the larger value of carbon distribution in the leaves, than the stems and the roots, respectively. Manggis seedlings have the larger value of biomass distribution in stem than the leaves, the roots, respectively.
{"title":"Distribusi Biomassa dan Karbon Tingkat Semai Jenis Manggis, Lengkeng, Sengon dan Jelutung","authors":"Yetrie Ludang, Wahyu Supriyati, Alpian Alpian","doi":"10.36873/jht.v17i1.4363","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4363","url":null,"abstract":"The carbon content in trees is affected by the amount of tree biomass. The value of the biomass content of the tree indicate to the value the carbon content. It is interest to study of the growth rate of seedlings and learn to carbon and biomass distributions. This aims of the study is to know the level of carbon distribution of Manggis, Lengkeng, Sengon and Jelutung seedlings. The samples of selected seedlings were removed (destructive method). The roots washed by water to remove the sticky soil. The samples dried for 1 day, dried with a temperature of 102 ± 30C to constant weight. Samples that have dried out are separated by organs (roots, stems and leaves), to measure the weight of biomass. Method of calculating carbon by ash of biomass for calculating carbon percentages. The percentage of carbon multiplied by the calculation of biomass to calculate carbon. The results of the study show that the Lengkeng (14.10 g) seedlings have the higher value of carbon, than Manggis (5.14 g), Jelutung (3.80 g), Sengon (2.01 g), respectively. The distribution of carbon in seedling organs of the seedling level were varies. Jelutung and Lengkeng seedlings were higher value of carbon distribution in stem, than the roots, the leaves, respectively. Sengon seedlings have the larger value of carbon distribution in the leaves, than the stems and the roots, respectively. Manggis seedlings have the larger value of biomass distribution in stem than the leaves, the roots, respectively.","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"3 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76644519","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}
Yoandri, S. Mayawati, Nuwa Nuwa, D. N. Koroh, M. Misrita
The potential of medicinal plants in the forest area of Kalimantan is quite diverse, both those that have been utilized by the community around the region and those that have not been utilized. Gohong Village is a village in Pulang Pisau Regency of Central Kalimantan Province which has an area of ±51,037 ha. The purpose of this study is to analyze the potential the spread and the economic value of yellow root medicinal plants in Gohong Village. The method used in this study is the Purposive Sampling method. The results of the analysis showed that an area of 2 hectares of yellow root plant potential was obtained as much as 2.174415 m3. The density value of yellow roots of 0,1875 or 0,188 for an area of 0.4 hectares there are 75 yellow root plants, and the average measurement plant found yellow root plants as many as 7-8 trees or per hectare, the density value of yellow root plants is 0.47. The frequency of yellow root plants at the research site was 0.8 with the number of plants as many as 75 trees. The spread of yellow roots in Gohong Village is uniform with a morisita index value of 0.8 respondent data in Gohong Village as many as 10 respondents obtained yellow root price data Per 1 Kg is Rp 50,000. Based on the analysis of the availability of yellow roots in the research location is quite significant and able to provide additional income for the community in order to support the economy.
{"title":"Valuasi Tumbuhan Akar Kuning (Arcangelisia flava Merr) di Desa Gohong Kabupaten Pulang Pisau Kalimantan Tengah","authors":"Yoandri, S. Mayawati, Nuwa Nuwa, D. N. Koroh, M. Misrita","doi":"10.36873/jht.v17i1.4393","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4393","url":null,"abstract":"The potential of medicinal plants in the forest area of Kalimantan is quite diverse, both those that have been utilized by the community around the region and those that have not been utilized. Gohong Village is a village in Pulang Pisau Regency of Central Kalimantan Province which has an area of ±51,037 ha. The purpose of this study is to analyze the potential the spread and the economic value of yellow root medicinal plants in Gohong Village. The method used in this study is the Purposive Sampling method. The results of the analysis showed that an area of 2 hectares of yellow root plant potential was obtained as much as 2.174415 m3. The density value of yellow roots of 0,1875 or 0,188 for an area of 0.4 hectares there are 75 yellow root plants, and the average measurement plant found yellow root plants as many as 7-8 trees or per hectare, the density value of yellow root plants is 0.47. The frequency of yellow root plants at the research site was 0.8 with the number of plants as many as 75 trees. The spread of yellow roots in Gohong Village is uniform with a morisita index value of 0.8 respondent data in Gohong Village as many as 10 respondents obtained yellow root price data Per 1 Kg is Rp 50,000. Based on the analysis of the availability of yellow roots in the research location is quite significant and able to provide additional income for the community in order to support the economy.","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"26 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83220174","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}
This study aimed to investigate the physical and chemical characteristics of the soil based on the type of land management in the production forest in Banyu Urip Village, Central Lombok. Determination of the sampling point is done by employing stratified random sampling. The sampling points were 22, divided into two types of land: forest land (dominated by MPTS plants and woody plants) and agricultural land (dominated by seasonal plants). Soil samples were taken with two depths, namely 0-10 cm and 10-20 cm. Soil samples taken were disturbed and undisturbed soil with variables of physical properties (texture, bulk density, porosity, and color) and soil chemistry (C-organic). The research results on the physical properties of the soil showed that the soil texture in both types of land was dominated by dusty clay. The average porosity value in agricultural land is 49.33%, and forest land is 49.48% (unfavorable category). The average bulk density value in forest land is 1.39 g/cm3 and in agricultural land is 1.35 g/cm^3 (high category). The soil color of the two land types is dominated by dark brown. The average value of C-organic soil is 1.80% in forest land and 1.72% in agricultural land (low category).
{"title":"Karakteristik Sifat Fisika dan Kimia Tanah Berdasarkan Tipe Pengelolaan Lahan pada Hutan Produksi Di Desa Banyu Urip Lombok Tengah","authors":"Epy Liana, M. Idris, Irwan Mahakam Lesmono Aji","doi":"10.36873/jht.v17i1.4189","DOIUrl":"https://doi.org/10.36873/jht.v17i1.4189","url":null,"abstract":"This study aimed to investigate the physical and chemical characteristics of the soil based on the type of land management in the production forest in Banyu Urip Village, Central Lombok. Determination of the sampling point is done by employing stratified random sampling. The sampling points were 22, divided into two types of land: forest land (dominated by MPTS plants and woody plants) and agricultural land (dominated by seasonal plants). Soil samples were taken with two depths, namely 0-10 cm and 10-20 cm. Soil samples taken were disturbed and undisturbed soil with variables of physical properties (texture, bulk density, porosity, and color) and soil chemistry (C-organic). The research results on the physical properties of the soil showed that the soil texture in both types of land was dominated by dusty clay. The average porosity value in agricultural land is 49.33%, and forest land is 49.48% (unfavorable category). The average bulk density value in forest land is 1.39 g/cm3 and in agricultural land is 1.35 g/cm^3 (high category). The soil color of the two land types is dominated by dark brown. The average value of C-organic soil is 1.80% in forest land and 1.72% in agricultural land (low category).","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"104 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85259248","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 aim of the study was to determined and record mangrove species composition anddiversity at Pitas mangrove forest, Sabah. Mangroves forest occurs in waterlogged, saltysoils of sheltered tropical and subtropical shores. It usually found along the coastlinesthroughout the world, usually between 25º N longitude and 25º S latitude. This study wasconducted in Pitas district (N 06?43’, E 117?4’) which is located at the northern tip ofSabah, Malaysia. Whereas, Pitas district has an approximately 38,564 ha of the mangrovearea. In this study, the mangrove location covered an area ranges from Malawali island(N 07?2.023', E 117?16.883'), Tobo island (N 07?01.070', E 117?19.008'), Layak-layakisland (N 06?56.587', E 117?14.323'), Mapan-mapan (N 06?51.608', E 117?14.861'), andJambongan island (N 06?45.016', E 117?25.816'). The random sampling method wasdone with simple plots sizes of 20m x 20m to determine the species’ biodiversity,composition and structure. As a result, 13 mangrove species have been identified in allstudy locations namely known as Sonneratia caseolaris, Ceriops tagal, Bruguieragymnorhiza, Rhizophora mucronata, Aegiceras corniculatum, Avicennia marina,Rhizophora apiculata, Sonneratia alba, Bruguiera cylindrica, Lumnitzera littorea,Pemphis acidula, Scyphiphora hydrophyllacea, and Scaevola taccada. The result showsthat the Shannon –Wiener biodiversity index (H’) at the island and disturbed mangroveareas is less diverse (H’ below than 1.5) compared to the undisturbed mainland areaswith (H’=1.95). Sonneratia caseolaris is the dominant mangrove species in the islandwith the highest value of Important Value Index (IVI) with 144.77% compared to allspecies in the study location. These areas show the importance of ecological aspectswithin the forest ecosystem. Therefore, the protection and conservation of this mangrovein this area is a necessity.Keywords: Mangrove, species composition, diversity, Important Value Index (IVI),island, mainland, disturbed, Pitas Sabah
{"title":"STRUCTURE AND COMPOSITION OF FLORAL AT MANGROVE FOREST IN PITAS SABAH MALAYSIA","authors":"A. R. Mojiol, A. Eliseus, W. Wahyudi","doi":"10.36873/jht.v15i1.1709","DOIUrl":"https://doi.org/10.36873/jht.v15i1.1709","url":null,"abstract":"The aim of the study was to determined and record mangrove species composition anddiversity at Pitas mangrove forest, Sabah. Mangroves forest occurs in waterlogged, saltysoils of sheltered tropical and subtropical shores. It usually found along the coastlinesthroughout the world, usually between 25º N longitude and 25º S latitude. This study wasconducted in Pitas district (N 06?43’, E 117?4’) which is located at the northern tip ofSabah, Malaysia. Whereas, Pitas district has an approximately 38,564 ha of the mangrovearea. In this study, the mangrove location covered an area ranges from Malawali island(N 07?2.023', E 117?16.883'), Tobo island (N 07?01.070', E 117?19.008'), Layak-layakisland (N 06?56.587', E 117?14.323'), Mapan-mapan (N 06?51.608', E 117?14.861'), andJambongan island (N 06?45.016', E 117?25.816'). The random sampling method wasdone with simple plots sizes of 20m x 20m to determine the species’ biodiversity,composition and structure. As a result, 13 mangrove species have been identified in allstudy locations namely known as Sonneratia caseolaris, Ceriops tagal, Bruguieragymnorhiza, Rhizophora mucronata, Aegiceras corniculatum, Avicennia marina,Rhizophora apiculata, Sonneratia alba, Bruguiera cylindrica, Lumnitzera littorea,Pemphis acidula, Scyphiphora hydrophyllacea, and Scaevola taccada. The result showsthat the Shannon –Wiener biodiversity index (H’) at the island and disturbed mangroveareas is less diverse (H’ below than 1.5) compared to the undisturbed mainland areaswith (H’=1.95). Sonneratia caseolaris is the dominant mangrove species in the islandwith the highest value of Important Value Index (IVI) with 144.77% compared to allspecies in the study location. These areas show the importance of ecological aspectswithin the forest ecosystem. Therefore, the protection and conservation of this mangrovein this area is a necessity.Keywords: Mangrove, species composition, diversity, Important Value Index (IVI),island, mainland, disturbed, Pitas Sabah","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"35 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82235372","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}
Kayu kawui adalah salah satu lesser known species yang belum banyak diketahui sifat-sifatkayunya. Tujuan penelitian ini adalah untuk mengetahui sifat fisika dan mekanika kayukawui. Bahan penelitian dua pohon kawui berdiameter 28,34 cm dan 34,74 cm diambil darihutan alam. Bahan dipotong menjadi tiga bagian yaitu pangkal, tengah dan ujung,pengujian mengikuti standar DIN. Penelitian menggunakan Rancangan Acak Lengkapdengan satu faktor yaitu letak pada batang dengan tiga aras yaitu pangkal-tengah dan ujung,seluruhnya dilakukan tiga ulangan. Hasil penelitian kadar air basah dan kering udara pohonkesatu lebih besar dari pohon kedua. Berat jenis kering udara dan kering tanur keduanyasama besar. Modulus elastis, modulus patah, keteguhan geser sejajar serat, keteguhan tekansejajar serat, keteguhan pukul pohon kesatu lebih kecil dari pohon kedua. Kekerasanterendah sampai tertinggi adalah pada bidang tangensial, bidang radial dan bidangtransversal. Perlakuan arah aksial kadar air dan berat jenis tidak berpengaruh nyata, ujiketeguhan geser sejajar serat, kekerasan bidang tangensial, radial serta keteguhan lengkungstatis berpengaruh nyata. Hasil uji Beda Nyata Jujur perlakuan terbaik untuk keteguhangeser sejajar serat pada bagian tengah, kekerasan bidang radial pada pangkal, kekerasanbidang tangensial dan keteguhan lengkung statis pada bagian ujung. Berat Jenis kayu kawuimasuk kelas kuat III, MoE masuk dalam kelas kuat II-IV, MoR dan keteguhan tekan sejajarserat masuk kelas kuat II. Kayu kawui cocok untuk penggunaan bahan bangunan, plywood,meubel, lantai, dinding, bantalan, kusen-kusen dan kapal.Kata kunci: Kawui, sifat fisika, sifat mekanika, kelas kuat II dan III.
{"title":"KUALITAS KAYU KAWUI (Vernonia arborea) YANG TUMBUH DI HUTAN GAMBUT","authors":"G. Siska, L. Indrayanti","doi":"10.36873/jht.v15i1.1712","DOIUrl":"https://doi.org/10.36873/jht.v15i1.1712","url":null,"abstract":"Kayu kawui adalah salah satu lesser known species yang belum banyak diketahui sifat-sifatkayunya. Tujuan penelitian ini adalah untuk mengetahui sifat fisika dan mekanika kayukawui. Bahan penelitian dua pohon kawui berdiameter 28,34 cm dan 34,74 cm diambil darihutan alam. Bahan dipotong menjadi tiga bagian yaitu pangkal, tengah dan ujung,pengujian mengikuti standar DIN. Penelitian menggunakan Rancangan Acak Lengkapdengan satu faktor yaitu letak pada batang dengan tiga aras yaitu pangkal-tengah dan ujung,seluruhnya dilakukan tiga ulangan. Hasil penelitian kadar air basah dan kering udara pohonkesatu lebih besar dari pohon kedua. Berat jenis kering udara dan kering tanur keduanyasama besar. Modulus elastis, modulus patah, keteguhan geser sejajar serat, keteguhan tekansejajar serat, keteguhan pukul pohon kesatu lebih kecil dari pohon kedua. Kekerasanterendah sampai tertinggi adalah pada bidang tangensial, bidang radial dan bidangtransversal. Perlakuan arah aksial kadar air dan berat jenis tidak berpengaruh nyata, ujiketeguhan geser sejajar serat, kekerasan bidang tangensial, radial serta keteguhan lengkungstatis berpengaruh nyata. Hasil uji Beda Nyata Jujur perlakuan terbaik untuk keteguhangeser sejajar serat pada bagian tengah, kekerasan bidang radial pada pangkal, kekerasanbidang tangensial dan keteguhan lengkung statis pada bagian ujung. Berat Jenis kayu kawuimasuk kelas kuat III, MoE masuk dalam kelas kuat II-IV, MoR dan keteguhan tekan sejajarserat masuk kelas kuat II. Kayu kawui cocok untuk penggunaan bahan bangunan, plywood,meubel, lantai, dinding, bantalan, kusen-kusen dan kapal.Kata kunci: Kawui, sifat fisika, sifat mekanika, kelas kuat II dan III.","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"209 0 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80631134","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}
Sengon (Paraserianthes falcataria (L) Nielsen) is one of some exotic plants, so that it issuitable for planting on mounds of peat-swamp land in support of revegetation andreforestation, and also to develop plantation forest. This plant have the short rotation,high economic and ecologically value. The aims of research was to know the diameterdistribution of sengon to detect normal growth as well as they were planted on themounds of peat-swamp land and on the traditionaly peat swamp land that floodingperiodically. Data were analized using polynomial equations to form the distributiongraphs. Based on result, at the 4.5 years old of sengon planted on the the mounds ofpeat-swamp land and on the traditionaly peat swamp land indicated the normal graph andabnormal graph respectively. Sengon that planted on the mounds of peat swamp landformed the polynomial equation Y= -35,4 + 47,043X – 6,7857 X2 with coefficient ofdetermination (R2) namely 90.41%, meanwhile Sengon that planted on the traditionalypeat swamp land formed the polynomial equation Y= -10 + 53,643X – 17,571 X2+ 1,5X3 with coefficient of determination (R2) namely (R2) namely 85.99%. Therefore,sengon that planted on the mounds of peat swamp land growth better than sengon thatplanted on the traditionaly of peat swamp landKeywords: Growth, polynomial, sengon, peat swamp land
{"title":"DISTRIBUSI DIAMETER TANAMAN SENGON (Paraserianthes falcataria) SEBAGAI INDIKATOR PERTUMBUHAN NORMAL","authors":"Bela Safitri, W. Wahyudi, Christopheros Santoso","doi":"10.36873/jht.v15i1.1713","DOIUrl":"https://doi.org/10.36873/jht.v15i1.1713","url":null,"abstract":"Sengon (Paraserianthes falcataria (L) Nielsen) is one of some exotic plants, so that it issuitable for planting on mounds of peat-swamp land in support of revegetation andreforestation, and also to develop plantation forest. This plant have the short rotation,high economic and ecologically value. The aims of research was to know the diameterdistribution of sengon to detect normal growth as well as they were planted on themounds of peat-swamp land and on the traditionaly peat swamp land that floodingperiodically. Data were analized using polynomial equations to form the distributiongraphs. Based on result, at the 4.5 years old of sengon planted on the the mounds ofpeat-swamp land and on the traditionaly peat swamp land indicated the normal graph andabnormal graph respectively. Sengon that planted on the mounds of peat swamp landformed the polynomial equation Y= -35,4 + 47,043X – 6,7857 X2 with coefficient ofdetermination (R2) namely 90.41%, meanwhile Sengon that planted on the traditionalypeat swamp land formed the polynomial equation Y= -10 + 53,643X – 17,571 X2+ 1,5X3 with coefficient of determination (R2) namely (R2) namely 85.99%. Therefore,sengon that planted on the mounds of peat swamp land growth better than sengon thatplanted on the traditionaly of peat swamp landKeywords: Growth, polynomial, sengon, peat swamp land","PeriodicalId":42714,"journal":{"name":"Jurnal Manajemen Hutan Tropika","volume":"14 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81394529","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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