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SIMULASI PERTUMBUHAN DAN HASIL MENGGUNAKAN SIKLUS TEBANG 25, 30 DAN 35 TAHUN PADA SISTEM TEBANG PILIH TANAM INDONESIA Wahyudi Wahyudi
Jurnal Penelitian Hutan Tanaman Vol 9, No 2 (2012): JURNAL PENELITIAN HUTAN TANAMAN
Publisher : Pusat Penelitian dan Pengembangan Hutan

Penerapan siklus tebang pada pengelolaan hutan alam produksi sering berubah-ubah. Simulasi siklus tebang dapat memproyeksikan jumlah pohon masak tebang pada siklus tebang berikutnya. Penelitian ini bertujuan untuk memprediksi pertumbuhan dan hasil tegakan tinggal, khususnya jumlah pohon masak tebang pada siklus kedua menggunakan siklus tebang 25, 30 dan 35 tahun. Penelitian dilakukan di plot penelitian (seri Petak Ukur Permanen/PUP) sistem TPTI di areal kerja PT. Gunung Meranti, Provinsi Kalimantan Tengah. Luas seri PUP adalah 6 ha dan pengambilan data dilakukan tahun 1998, 2000, 2002, 2005 dan 2010. Pemodelan dan simulasi menggunakan Stella 9.0.2 dalam bentuk diagram alir diameter pohon pada kelas diameter 10-19 cm, 20-29 cm, 30-39 cm, 40-49 cm, 50-59 cm dan 60 cm ke atas. Model ini menggunakan persamaan ingrowth, upgrowth, mortality dinamika kerapatan tegakan (N/ha) dan dinamika luas bidang dasar (B/ha) tegakan tinggal. Hasil penelitian menunjukkan bahwa kerapatan pohon masak tebang pada siklus tebang kedua sebesar 11,85 pohon/ha, 15,48 pohon/ha dan 17,13 pohon/ha masing-masing pada penerapan siklus tebang 25, 30 dan 35 tahun. Target produksi kayu sebaiknya menyesuaikan dinamika tegakan tinggal. Model simulasi ini dapat memberi gambaran yang realistis terhadap target produksi kayu berdasarkan siklus tebang, struktur dan komposisi tegakan tinggal.

GROWTH AND YIELD OF Shorea parvifolia PLANTED UNDER AKASIA PLANTS IN KAPUAS, CENTRAL KALIMANTAN Wahyudi .
Jurnal Silvikultur Tropika Vol. 7 No. 3 (2016): Jurnal Silvikultur Tropika (Suplemen Desember)
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.7.3.S48-S49

Shorea parvifolia is the native species of Kalimantan and has a high commercial value. This research was aimed to analysis the growth and yield of meranti planted under Acacia mangium stands, as enrichment planting on the TPTI silvicultural system. The research was conducted at Kapuas District, Central Kalimantan Province. Type of soil at the site is ultisol with 2 606 mm/year of precipitation average. Initially, Acacia mangium planted with space namely 3 x 3 m at 1993. After two years, seedlings of Shorea parvifolia were planted among akasia plants with 1 111 tress/ha of density. Thinning of akasia plants were conducted stage by stage, especially at the stunted plants or dead. The data were latest analyzed at 2014 or at the moment of 20 years old. Research result showed that at the 1, 5, 10, 15, and 15 years old, life percentage of Shorea parvifolia are 94.8%, 78%, 66.4%, 57.5%, and 53% respectively. Average diameter of Shorea parvifolia at the same times are 1.27 cm, 6.13 cm, 12.8 cm, 19.86, and 27.46 cm respectively, and their average total height are 1.51 m, 5.27 m, 10.89 m, 17.18 m, and 24.41 m respectively. Volume growth of Shorea parvifolia at the same times namely 0.05 m3/ha , 3.97 m3/ha, 36.93 m3/ha, 145.44 m3/ha, and 303.62 m3/ha respectively.Key words: growth and yield, CAI, MAI, Shorea parvifolia.

EFEKTIFITAS PENYARADAN DALAM PENERAPAN REDUCED IMPACT LOGGING PADA TEGAKAN DIPTEROKARPA DI HPH GUNUNG MERANTI, KALIMANTAN TENGAH Wahyudi Wahyudi; Sudin Panjaitan
Jurnal Penelitian Ekosistem Dipterokarpa Vol 2, No 1 (2008): Jurnal Penelitian Dipterokarpa
Publisher : Jurnal Penelitian Ekosistem Dipterokarpa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jped.2008.2.1.83-92

Pengelolaan hutan alam secara lestari memerlukan sistem pembalakan yang mengkombinasikan efektifitas tinggi dan dampak ekologi yang rendah khususnya terhadap tegakan tinggal. Sistem pembalakan yang didisain untuk memenuhi persyaratan tersebut adalah Reduced Impact Logging (RIL). Penyaradan merupakan bagian dari kegiatan pembalakan yang paling berpotensi menimbulkan kerusakan tegakan tinggal, tetapi juga berpengaruh terhadap efisiensi finansial dari sistem secara keseluruhan. Penelitian ini bertujuan untuk mengetahui efektifitas dari penyaradan RIL pada pembalakan hutan dipterokarpa. Dengan menggunakan empat ulangan di areal PT Gunung Meranti Kalimantan Tengah, penelitian ini menunjukkan bahwa penyaradan RIL lebih efisien daripada penyaradan secara konvensional. Parameter yang diukur meliputi produktifitas (daya jelahah, volume kayu yang disarad) dan biaya (waktu dan volume BBM yang dipakai).

Teknik Konservasi Tanah serta Implementasinya pada Lahan Terdegradasi dalam Kawasan Hutan Wahyudi Wahyudi
Jurnal Sains & Teknologi Lingkungan Vol. 6 No. 2 (2014): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jstl.vol6.iss2.art1

Large of degraded forest areas in Indonesia namely 19.5 million ha and its rate start from 1.8 to 2.84 million ha years-1. Initially in the form of virgin forests, they were degraded become low potential forest, scrub, bush, grass land to critical land. The critical land is very dangerous for natural resources establishment because happened the high erosion and menacing flood. The solutions to minimize the environmental damage in the critical land are developing the soil conservation technique in the sites. This research was aimed to collect and analyze some soil conservation techniques and its implementation in the degraded land of forest regions. The research was conducted with literature and fields study in the PT. Gunung Meranti areas, Kapuas District, Central Kalimantan Province. Some soil conservation techniques that applied in the degraded land of forest regions are wet masonry, stone terrace works, gabion works,log retaining works,log grib works,bamboo and wicker terrace, soil bag terrace works and straw mat terrace works. To support the civil and vegetation soil conservation technique, commonly using the water channels as sod water channel works, stone water channel works, soil bag water channel works and catchment pipe culvert.

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

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

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

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.).

ANALISIS PERTUMBUHAN DAN HASIL TANAMAN SUNGKAI (Peronema canescens Jack.) DI KALIMANTAN Wahyudi Wahyudi; Zainal Muttaqin; A. Russel Mojiol
JURNAL SAINS NATURAL Vol. 2 No. 2 (2012): Sains Natural (Edisi Khusus)
Publisher : Universitas Nusa Bangsa

Growth and Yield Analysis of Peronema canescens Jack. in KalimantanÂ Â Â Â Â Â Â Â Â Sungkai (Peronema canescens) is a native and local species and one of some commercial trees which has a good prospect to be developed in timber estate in Kalimantan.This research was aimed to analyse sungkai plantation, neither the living percentage, productivity, economic cutting cycle, and also its profit. The data analysis was using the average of trees diameter, high and volume, mean annual increment, polynomial equation modelling and financial analysis i.e. net present value (NPV), benefit cost ratio (BCR) and internal rate of return (IRR). The research had been conducted at the community plantation in Kapuas District, Central Kalimantan Province since 1998 to 2010.Â The result of this research showed that living trees precentage at 12 years old was 89.7%, mean annual increment and its density were 10,14 m3 ha-1Â and 997 tree/ha respectively. Equation modelling of sungkai plantation was y = 2,073 + 1,6623x - 0,0165x2 (R2= 84,05%). In the bank rate of 9% per year, the economic cutting cycle of this plantation was 15 years with net present value was NPV 58,49 million per ha. BCR 7,64 and IRR 11,75 If the bank rate of 6% and 12% per year, then net present value at the 15 years were NPV 92.65 and 36.6 million per ha respectively. The sangtein was suitable as timber estate and to increase the productivity of former shifting cultivation, scru, and low potential forests which were widespread, especially in Kalimantan.Keywords :Â Growth and yield, mean annual increment, Peronema canescens, economic cutting cycleÂ ABSTRAKÂ Â Â Â Â Â Â Sungkai adalah jenis tanaman komersial lokal dan asli yang mempunyai prospek baik untuk dikembangkan dalam hutan tanaman Kalimantan. Penelitian ini bertujuan untuk mengetahui prosen hidup, produktivitas, siklus tebang optimum, dan keuntungan finansial dari tanaman sungkai. Penelitian dilakukan di hutan tanaman rakyat, Kabupaten Kapuas Provinsi Kalimantan Tengah. Obyek penelitian ialah tanaman sungkai yang ditanam sejak tahun 1998 pada tipe tanah Ultisol. Analisis data menggunakan nilai rataan diameter, tinggi dan volume, riap tahunan rata-rata tahunan, persamaan regresi, NPV, BCR dan IRR. Hasil penelitian menunjukkan bahwa pada umur 12 tahun prosen hidup tanaman mencapai 89,7 %, riap tahunan rata-rata 10,14 m3 ha-1 year-1 dengan kerapatan 997 pohon/ha. Model pertumbuhan tanaman sungkai ialah y = 2,073 + 1,6623x - 0,0165x2 (R2= 84,05%). Pada tingkat suku bunga pinjaman 9% per tahun, tanaman sungkai mempunyai siklus tebang ekonomi selama 15 tahun dengan nilai NPV Rp. 58,49 juta/ha, BCR: 7,64 dan IRR: 11,75%. Pada tingkat suku bunga pinjaman 6% dan 12% per tahun, maka pada siklus tebang selama 15 tahun, nilai NPVnya masing â€“ masing menjadi Rp. 92,65 juta/ha dan Rp. 36,6 juta/ha. Tanaman sungkai sangat sesuai dikembangkan dalam hutan tanaman dan untuk meningkatkan produktivitas lahan bekas perladangan berpindah, semak belukar dan hutan potensi rendah yang tersebar luas, khususnya di Kalimantan.Kata kunci : Pertumbuhan dan hasil, riap tahunan rata â€“ rata, Peronema canescens, siklus tebang ekonomi

EFEKTIFITAS PENYARADAN DALAM PENERAPAN REDUCED IMPACT LOGGING PADA TEGAKAN DIPTEROKARPA DI HPH GUNUNG MERANTI, KALIMANTAN TENGAH Wahyudi Wahyudi; Sudin Panjaitan
Jurnal Penelitian Ekosistem Dipterokarpa Vol 2, No 1 (2008): Jurnal Penelitian Dipterokarpa
Publisher : Jurnal Penelitian Ekosistem Dipterokarpa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jped.2008.2.1.83-92

Pengelolaan hutan alam secara lestari memerlukan sistem pembalakan yang mengkombinasikan efektifitas tinggi dan dampak ekologi yang rendah khususnya terhadap tegakan tinggal. Sistem pembalakan yang didisain untuk memenuhi persyaratan tersebut adalah Reduced Impact Logging (RIL). Penyaradan merupakan bagian dari kegiatan pembalakan yang paling berpotensi menimbulkan kerusakan tegakan tinggal, tetapi juga berpengaruh terhadap efisiensi finansial dari sistem secara keseluruhan. Penelitian ini bertujuan untuk mengetahui efektifitas dari penyaradan RIL pada pembalakan hutan dipterokarpa. Dengan menggunakan empat ulangan di areal PT Gunung Meranti Kalimantan Tengah, penelitian ini menunjukkan bahwa penyaradan RIL lebih efisien daripada penyaradan secara konvensional. Parameter yang diukur meliputi produktifitas (daya jelahah, volume kayu yang disarad) dan biaya (waktu dan volume BBM yang dipakai).

PEMANFAATAN DAUN SIRIH (Piper betle Linn) SEBAGAI BAHAN PEMBUATAN HANDS SANITIZER ALAMI DALAM USAHA MENGATASI DAMPAK COVID-19 BAGI MASYARAKAT KELURAHAN TANJUNG PINANG, PALANGKA RAYA Misrita Misrita; Wahyudi Wahyudi; Nidia Najati; Imam Qalyubi
Agrienvi: Jurnal Ilmu Pertanian Vol. 14 No. 2 (2020): Desember
Publisher : Agrienvi: Jurnal Ilmu Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar

Cases of the coronavirus pandemic in Indonesia are increasing and spreading throughout Indonesia, including the Tanjung Pinang urban village, Palangka Raya. This area is one of the areas that have quite high confirmed casualties, so one of the ways used to overcome the impact of the widespread of the Coronavirus is to clean hands regularly using hand sanitizer containing alcohol or washing hands with soap. and running water. Some hand sanitizer preparations can be found on the market by using it quite simply and quickly, namely by dropping it on the palm of the hand, then flattening it on the surface of the hand. However, it usually contains a lot of alcohol and antiseptics in the form of synthetic chemicals which are relatively expensive and often cause skin health problems, for example, dry skin (decrease in normal skin moisture). Therefore, it is necessary to look for an antiseptic from natural ingredients that are relatively cheaper, safe, effective, and easy to obtain, one of the examples is betel and orange leaves. Natural hand sanitizers themselves have many advantages, including being an alternative for people who have allergies or are sensitive to chemicals; the material is very easy to get; little/cheap capital; and it doesn't take a lot of time in the manufacturing process. Selection of betel leaf as the main ingredient in natural hand sanitizers because betel leaves contain antiseptic properties that can kill germs. The addition of lime juice has a function as a natural preservative that is high in antioxidants. Providing education to community groups in Tanjung Pinang village, Pahandut district, aims to help housewives in utilizing one of the family medicinal plants (TOGA) as well as helping to provide easy and inexpensive solutions to get hand sanitizers which are currently the target of all people due to the Covid-pandemic. 19. The making of this article uses secondary data that comes from linked references and experimental data. Keywords: hands sanitizer, natural, betel leaf.

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