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All Journal Jurnal Silvikultur Tropika (JST) Jurnal Penelitian Hutan Tanaman Jurnal Penelitian Ekosistem Dipterokarpa Jurnal Sains & Teknologi Lingkungan Sains Natural: Journal of Biology and Chemistry Agrienvi : Jurnal Ilmu Pertanian Jurnal Hutan Tropika Jurnal Penelitian Ekosistem Dipterokarpa
Wahyudi Wahyudi
Jurusan Kehutanan Fakultas Pertanian Universitas Palangka Raya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Social Sciences

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Journal : Jurnal Hutan Tropika

 1 
PERTUMBUHAN TANAMAN JELUTUNG RAWA (Diera lowii) DI LAHAN RAWA GAMBUT KABUPATEN PULANG PISAU, KALIMANTAN TENGAH (Growth of Jelutung rawa (Diera lowii) at the Peat Swamp Land in Pulang Pisau District, Cetral Kalimantan) Wahyudi; Antonius Triyadi
HUTAN TROPIKA Vol 14 No 2 (2019): Volume 14 Nomor 2 Tahun 2019
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (467.529 KB) | DOI: 10.36873/jht.v14i2.1152

Abstract

Plantation of jelutung rawa (Diera lowii) project has been conducted by many local peoples, aspecialy at the Pulang Pisau District, Central Kalimantan. The purpose of this research was to analyze the growth of Jelutung rawa (Diera lowii) at the Peat Swamp Land in Pulang Pisau District, Cetral Kalimantan. The research was conducted at Jabiren Village, Pulang Pisau Disttrict, Central Kalimantan start from July to September 2019. Researct result showed that mean annual increment (MAI)-diameters of jelutung rawa at 4, 6, 7, 10, 12 dan 13 years old namely 2.52 cm-2, 2.52 cm-2, 2.80 cm-2, 2.22 cm2 , 2,14 cm-2 and 2,02 cm-2 respectively. Meanwhile, at the same of ages, height of jelutung rawa namely 4.88 m, 6.50 m, 10.84 m, 11.29 m, 16.17 m, and 19.30 m respectively. Polynomial growth model of jelutung rawa for their diameter and height are y = - 3.825941 + 4.1244995x + (-0.140316) x 2 and y = 3.562047 + 0.212857x + 0.72187x2 respectively with coefficient of determination namely 62% and 82% respectively.
DISTRIBUSI DIAMETER TANAMAN SENGON (Paraserianthes falcataria) SEBAGAI INDIKATOR PERTUMBUHAN NORMAL: Sengon Plant Diameter Distribution (Paraserianthes falcataria) as Normal Growth Indicators Bela Safitri; Wahyudi Wahyudi; Christopheros
HUTAN TROPIKA Vol 15 No 1 (2020): Volume 15 Nomor 1 Tahun 2020
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v15i1.1713

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
Struktur, Komposisi dan Pertumbuhan Vegetasi pada Lahan Gambut Bekas Terbakar Tahun 2015 Di UPT Laboratorium Alam Hutan Gambut Sebangau: Structure, Composition and Vegetation Growth on Peat Land Used By Fire In 2015 At UPT Natural Laboratory Of Sebangau Peat Forest Canra P. Lumban Gaol; Wahyudi Wahyudi; Santosa Yulianto
HUTAN TROPIKA Vol 17 No 1 (2022): Volume 17 Nomor 1 Tahun 2022
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v17i1.4399

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.).
Penilaian Kesehatan Pohon Pada Jalur Hijau Di Kota Palangka Raya Kalimantan Tengah : Tree Health Assessment on the Green Line in the City of Palangka Raya, Central Kalimantan Desliana Saragih; Wahyudi Wahyudi; Patricia Erosa Putir
HUTAN TROPIKA Vol 17 No 2 (2022): Volume 17 Nomor 2 Tahun 2022
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v17i2.7534

Abstract

This study aims to determine the level of tree health, determine the form of pest and disease attacks including damage caused by disturbance or human activities and make recommendations for tree species to be planted on the Green Line, Palangka Raya, Central Kalimantan. The method used is Forest Health Monitoring (FHM) through grouping the type and level of damage to each individual tree. The results showed that the number of trees found at the study site amounted to 301 individuals from 24 tree species. Analysis of the Health Level of Trees based on the value of the Tree Damage Level Index (TDLI) obtained the category of severe damage level of 45 trees or 15%, light damage level of 97 trees or 33%, and moderate damage level of 78 trees or 26% while healthy trees have total 78 trees or 26%. Based on the level of tree health, the types of trees suitable for planting in the green lane, Palangka Raya City are trembesi (Samanea saman (Jacq.) Merr.), Angsana (Pterocarpus indicus Willd.), and Ketapang (Terminalia catappa H. Perrier,). Kata kunci (Keywords): Green line, tree health level, trembesi, angsana, ketapang.
Penentuan Waktu Sadap Getah Pantung (Dyera lowii) di Lahan Rawa Gambut Wahyudi Wahyudi; Antonius Triyadi; Nursiah Nursiah
HUTAN TROPIKA Vol 18 No 1 (2023): Volume 18 Nomor 1 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i1.9700

Abstract

Pantung tree (Dyera lowii) is a critically endangered species that grows in peat swamps. Pantung cultivation is not only for commercial purposes but also for species conservation, reforestation and rehabilitation of degraded peat swamp land. One of the benefits of the pantung plant is to use its sap as a material for making pencil erasers, rubber toys and others. This study aims to determine the tapping time of pantung plant sap based on its growth rate. Based on the results of this study, the growth in diameter and height of pantung plants can be described through polynomial equations, i.e: y = -3.825941 + 4.1244995x + (-0.140316)x2 and y = 3.562047 + 0.212857x + 0.72187x2 respectively: The time for tapping pantung plant sap in peat swamp land is when the plant has reached a diameter of 20 cm or has reached a height of 12 meters. Based on the polynomial equation, the tapping time for pantung plant sap is 8 years old, when the pantung plant reaches a diameter of 20.42 cm; or at the age of 10 years, when the plant reaches a height of 12.91 meters
Model Pertumbuhan Polinomial Tanaman Meranti (Shorea spp) pada Sistem Tebang Pilih Tanam Jalur di PT Sari Bumi Kusuma Endah Winarni; Wahyudi Wahyudi; Bhayu Rhama
HUTAN TROPIKA Vol 18 No 1 (2023): Volume 18 Nomor 1 Tahun 2023
Publisher : Jurusan Kehutanan, Fakultas Pertanian Universitas Palangka Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36873/jht.v18i1.9702

Abstract

Meranti (Shorea spp) is a commercial trees that dominates the lowland tropical rainforests of Indonesia. Harvesting of this species has been carried out since the early 70's until now, but efforts to cultivate meranti are still very few. The silvicultural system of TPTJ with silin technique has placed meranti as species that must be planted by companies of forest concession. This study aims to construct a polynomial growth model for meranti at PT Sari Bumi Kusuma, so as to be able to predict the achievement of diameter, branch-free height and total height of meranti plants at a certain time. Meranti plants at PT Sari Bumi Kusuma have a diameter growth model: Y= 0.6076 + 0.3067X + 0.0524X2 (R2 : 94.74%), a branch-free height growth model: Y=0.0315+0.4787X+ 0.0081X2 (R2 : 89.53 %) and total height growth model: Y=0.4957+0.758X+0.0138X2 (R2 : 93.78%). The TPTJ system has a cutting cycle of 25 years with a limited diameter of harvested trees is 40 cm. Based on the results of this modeling, most of these trees have reached a diameter of 41.03 cm; branch-free height of 17.06 m and a total height of 28.07 m, so that it is ready to be harvested at the age of 25 years
Co-Authors A. Russel Mojiol Bela Safitri Bhayu Rhama Canra P. Lumban Gaol Christopheros Christopheros Santoso Desliana Saragih Endah Winarni Imam Qalyubi Misrita Misrita Muttaqin, Zainal Nidia Najati Nursiah Nursiah Patricia Erosa Putir Santosa Yulianto Sudin Panjaitan Triyadi, Antonius