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INDONESIA
Jurnal Ilmu Kehutanan
ISSN : 01264451     EISSN : 24773751     DOI : https://doi.org/10.22146/jik.28284
Focusing on aspects of forestry and environments, both basic and applied. The Journal intended as a medium for communicating and motivating research activities through scientific papers, including research papers, short communications, and reviews
Articles 206 Documents
Evaluasi Awal Kombinasi Uji Provenans dan Keturunan Araucaria Cunninghamii Umur 12 Bulan di Bondowoso, Jawa Timur Dedi Setiadi
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8386.243 KB) | DOI: 10.22146/jik.577

Abstract

Uji keturunan Araucaria cunninghamii telah dibangun tahun 2008 di Bondowoso Jawa Timur. Sebanyak 80 famili dari enam sumber benih (Fak-fak, Sorong, Serui, Wamena, Manokwari dan Queensland). Uji keturunan dirancang menggunakan rancangan acak lengkap berblok (Randomized Completely Block Design), 4 pohon per plot, 4 ulangan dengan jarak tanam 4 m x 2 m. pada umur 12 bulan perbedaan tinggi dan diameter di antara sumber benih berbeda nyata. Persen tumbuh semua provenans umumnya tinggi (96,7-100%). Perbedaan famili dalam sumber benih sangat berbeda nyata baik untuk tinggi maupun diameter. Heritabilitas pertumbuhan tinggi (h2f = 0,58; h2i = 0,28) dan diameter (h2f = 0,55; h2i = 0,30) termasuk klasifikasi sedang. Korelasi genetik antara tinggi dan diameter cukup kuat (rg = 0,78).Kata kunci: Araucaria cunninghamii, uji keturunan, pertumbuhan awal, heritabilitas. Early Evaluation of Provenance and Progeny  Trial  Combination  of Araucaria Cunninghamii Age 12 Months in Bondowoso, East JavaAbstractA progeny test of Araucaria cunninghamii seedling seed orchard was established in 2008 in Bondowoso, East Java. The progeny trial comprises of eighty open-pollinated families collected from six seed sources (Fak-fak, Sorong, Serui, Wamena, Manokwari and Queensland). The trial was designed as a Randomized Complete Block Design (RCBD) consisted of 80 seedlots, 4 tree-line plots, 4 replicates with spacing of 4 m x 2 m. At 12 months of age there were significant differences  among provenances for tree height and stem diameter. The survival rate of all provenances was high (96.7 -100%). Differences between families within seed source were significant both for height and diameter growth. Estimated heritability for height was moderate (12f= 0.58; h2 = 0.28) and also for diameter (f = 0.55; h21 = 0.30). Genetic correlation between height and diameter was quite strong (rg = 0.78).
Analisis Perambahan Hutan di Taman Nasional Bukit Barisan Selatan (Studi Kasus Desa Tirom Kecamatan Pematang Sawa Kabupaten Tanggamus) Deni Deni
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13646.922 KB) | DOI: 10.22146/jik.578

Abstract

Taman Nasional di Indonesia sebagian besar memiliki masalah terkait keberadaan manusia. Taman Nasional Bukit Barisan Selatan (TNBBS), sejak penunjukannya selalu ada konflik dengan masyarakat di sekitarnya. Di TNBBS telah ada tindakan penggunaan lahan illegal dimana hal ini sering disebut dengan perambahan hutan. Perambahan hutan yang terjadi di Desa Tirom menjadi menarik untuk diperhatikan karena Desa Tirom memiliki penanganan konflik yang lebih rumit dibandingkan dengan desa-desa lainnya di sekitar TNBBS.Penelitian ini mencoba mengungkap faktor apa saja yang menyebabkan tindakan perambahan hutan oleh masyarakat Desa Tirom di Kecamatan Pematang Sawa, Kabupaten Tanggamus. Penelitian ini menggunakan metode deskriptif kualitatif dan metode kuantitatif untuk menguji factor kepemilikan lahan legal dan pendapatan masyarakat sebagai factor yang mempengaruhi tindakan perambahan hutan. Dalam metode kualitatif, responden dipilih secara purposive dan wawancara dilakukan secara mendalam, sementara itu teknik survey dilakukan untuk menguji secara kuantitatif.Berdasarkan hasil wawancara mendalam disimpulkan adanya beberapa masalah social ekonomi yang dialami masyarakat Desa Tirom seperti pendapatan rendah, sedikitnya sumber penghidupan dan kurangnya kapasitas masyarakat dalam mengelola pertanian lahan sempit. Berdasarkan hasil analisis regresi diketahui bahwa tidak ada hubungan yang kuat antara tindakan perambahan lahan dengan pendapatan dan kepemilikan lahan pribadi. Studi ini menunjukkan juga bahwa ada faktor lain (selain faktor pendapatan dan kepemilikan lahan pribadi) yang menyebabkan perambahan hutan oleh masyarakat Desa Tirom. Faktor-faktor ini perlu dikaji dalam penelitian lebih lanjut.Kata kunci: Perambahan, Desa Tirom, Taman Nasional Bukit Barisan SelatanAnalysis of Forest Encroachment in Bukit Barisan Selatan National Park (Study case in Tirom Village, Pematang Sawa Sub Regency, Tanggamus Regency)AbstractMost of National Parks in Indonesia have their problems related to human existence in conservation area. Since its establishment, there has been a conflict between Bukit Barisan Selatan National Park (BBSNP) with the surrounding communities. In the BBSNP, there have been acts of illegal landusage where it is commonly referred as forest encroachment. Forest encroachment in Tirom village is becoming interesting to study because it needs more complicated handling compared to other villages.This study aims to reveal the factors led to forest encroachment action by people of Tirom village, Pematang Sawa sub-district, Tanggamus District. This social research used descriptive qualitative and quantitative methods to test the legal land ownership factors and people income as factors affecting forest encroachment action. In this method, respondents were chosen purposively and interview was conducted deeply (in-depth interview) on each respondent.Based on the results of in-depth interviews it is concluded that there are several socio-economic problems experienced by the Tirom village including low income, limited sources of livelihood, and low capacity of communities in managing small areas. Based on regression analysis resultsit was shown that there is no strong relationship between the act of appropriation (as seen from the encroachment of land area) with revenues and private land ownership. This study also shows that there are other factors (beside income and private land ownership factors) that led to forest encroachment by the Tirom Village communities. These other factors need to be tested through further research.
Komponen Kimia Kayu Jati dengan Pertumbuhan Eksentris Ganis Lukmandaru
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (10926.045 KB) | DOI: 10.22146/jik.579

Abstract

Tujuan penelitian ini adalah untuk mengetahui kualitas kayu cacat. Spesimen penelitian berupa 10 pohon miring yang diperoleh dari kegiatan penjarangan dari tegakan jati (Tectona grandis L.f.) di Randublatung, Jawa Tengah. Pada setiap pohon, kayu di bagian eksentrisnya dipisahkan \, kemudian sampel serbuk kayu diambil pada bagian teras terluar pada kedua lebar lingkaran tahun maksimum (bagian atas pohon miring) dan pada arah yang berlawanan, yaitu yang mempunyai lebar lingkaran tahun minimum (bagian bawah pohon miring). Serbuk kayu dihaluskan sampai mencapai 40-60 mesh untuk analisis kimia. Analisis data melalui uji t pohon pada kadar ekstraktif etanol-benzena (4-12%), kadar terlarut air panas (1-3%), kadar abu (0,7-3%) dan kadar lignin terlarut asam (0,7-1,4%). Pengukuran menggunakan GC dan GC-MS, menunjukkan tidak ada beda yang mencolok pada jumlah komponen utama ekstraktif etanol-benzena. Sebaliknya, kayu dengan lingkaran tahun paling lebar secara konsisten memiliki kadar lignin Klason lebih tinggi (32-35%) dibandingkan kayu dengan lingkaran tahun sempit (29-33%). Hasil-hasil tersebut menunjukkan bahwa eksentris lebih berkaitan dengan komponen dinding sel kayu daripada zat-zat metabolism sekunder. Selanjutnya, tidak terlihat juga adanya indikasi terhadap pembentukan kayu tarik.Kata kunci: Tectona Grandis, kayu eksentris, pohon miring, sifat kimia, riap tumbuh. Chemical Components of Teak Wood with Eccentric Growth AbstractThe objective of this study is to learn the quality of abnormal woods. The specimens were 10 leaning trees obtained from thinned teak (Tectona grandis L.f.) stand in Randublatung, Central Java. In each tree, the eccentric growth parts were isolated, then wood meal sample was drilled at the outer heartwood part of both maximum annual-ring width (upper part of leaning stem) and in its opposite side, which had minimum annual-ring width (lower part of leaning stem). The wood meals were ground to size of 40-60 mesh for chemical analysis. Data analysis by paired t-test showed that no significant difference was found between the upper and lower parts in ethanol-benzene extractive content (4-12%), hot-water soluble content (1-3%), ash content (0.73%) and acid soluble lignin content (0.7-1.4 %) . By means of Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS), no striking difference was also observed in the levels of major components of ethanol-benzene extracts. On the other hand, in Klason lignin content, the wood with widest ring consistently showed a higher content (32-35 %) than that with narrowest ring (29-33 %). These findings indicated that the eccentricity is more related to cell wall components than to secondary metabolites. Further, there is no indication with regard to the formation of tension wood.
Kaindea: Dinamika Pengelolaan Hutan Adat di Pulau Kecil (Studi Kasus: Pulau Wangi-Wangi Kabupaten Wakatobi) Nur Arafah; Dudung Darusman; Didik Suharjito; Leti Sundawati
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (14437.637 KB) | DOI: 10.22146/jik.580

Abstract

Indonesia adalah Negara Kepulauan yang mempunyai keragaman ekologi dan budaya dalam pengelolaan sumberdaya alam. Termasuk dalam pengelolaan hutan, masyarakat pulau-pulau kecil mempunyai system pengelolaan hutan adat yang terpelihara secara turun-temurun. Penelitian ini bertujuan mengkaji dinamika pengalolaan hutan adat berdasarkan kearifan masyarakat Pulau Wangi-Wangi. Penelitian ini kualitatif dengan metode studi kasus dalam perspektif emik, yaitu pandangan masyarakat Mandati di Pulau Wangi-Wangi terhadap pengelolaan hutan adat. Data dianalisis dengan pendekatan sejarah secara deskriptif. Hasil penelitian menunjukkan bahwa Masyarakat Mandati di Pulau Wangi-Wangi masih mempunyai pengelolaan hutan adat berbasis masyarakat yaitu Kaindea. Kaindea dikelola berdasarkan aturan adat yang berfungsi konservasi, ekonomi dan sosial budaya. Kelestarian pengelolaan hutan adat secara turun-temurun berkaitan dengan eksistensi hubungan antara “Kaindea-Koranga” (hutan-kebun) dengan masyarakat. Disarankan agar transformasi kelembagaan pengelolaan hutan adat sebagai pilihan kebijakan berdasarkan kearifan dan kondisi ekologi local.Kata kunci: Kaindea, hutan adat, pulau-pulau kecil, kearifan lokal.Kaindea: Dynamic Management of Indigenous Forest in Small Island (Study Case: Wangi-wangi Island, Wakatoby Regency)AbstractIndonesia as the archipelago country has diverse ecological and natural resources. Similarly, the type of forest management and its conditions also vary widely, so it requires an appropriate management system adapted to the local conditions. The objective of this study is to find out local wisdom in the Kaindea management system and ecological, economic and social-cultural fungction on Wangi-Wangi Island. This study is qualitative research with a case study method in emics perspective. Data is then analyzed descriptively by historical approach. The result of the study showed that Mandati community in Wangi- Wangi Island has a unique forest management system based on community. It's called Kaindea. Kaindea management in general is based on the customary roles. The Kaindea has ecological, economics and socio-cultural functions. The sustainability of communal forest management is related to the existence of "Kaindea-Koranga" (forest-garden) relationship. It is suggested that institution transformaion of communal forest management becomes a policy options based on the local wisdom and ecological conditions.
Inventore Biomasa dan Karbon Jenis Jati (Tectona grandis L.f.) di Hutan Rakyat Desa Jatimulyo, Karanganyar Ris Hadi Purwanto; Melikaries Silaban
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (13371.557 KB) | DOI: 10.22146/jik.581

Abstract

Hutan menyimpan biomassa dan karbon dalam bentuk pepohonan hidup, bagian organ tumbuhan yang sudah mati yang berada di lantai hutan (misalnya seresah), tanah dan hasil kayu. Kajian ini memaparkan hasil inventore biomassa bagian organ tanaman jati (Tectona grandis L.f.) diatas permukaan tanah (above ground biomass) yang tumbuh di lahan hutan rakyat Desa Jatimulyo, Kabupaten Karanganyar. Diawali dengan penyusunan allometrik, kegiatan inventore dilakukan untuk menaksir potensi biomassa organ tanaman jati di atas permukaan tanah yang tumbuh di lahan hutan rakyat tersebut. Untuk menyusun persamaan allometrik, sebanyak 410 pohon diukur untuk menentukan hubungan antara tinggi pohon (H) dan diameter batang setinggi dada (D). Sepuluh pohon sampel dengan ukuran yang bervariasi ditebang dan berat biomassa masing-masing organ tanaman di atas permukaan tanah (batang, cabang dan daun) diukur. Hasil penyusunan allometrik ini menunjukkan bahwa diameter batang setinggi dada (±1.3 meter diatas permukaan tanah, D) merupakan penduga yang baik untuk tinggi pohon (H) dengan nilai koefisien determinasi r2 diatas 0,8886. Ketika parameter D dikombinasi dengan H, nilai r2 semakin meningkat untuk biomassa batang, cabang dan total biomasa di atas permukaan tanah; menandakan bahwa pola pertumbuhan antar dimensi pohon saling mempengaruhi secara kuat (closely interdependent). Simpanan karbon tegakan jati di hutan rakyat ini diukur dengan asumsi bahwa kadar karbon (C) sebesar 50% dari berat biomasanya. Simpanan biomasa hidup dari organ tanaman jati bagian di atas permukaan tanah yang tumbuh di hutan rakyat Desa Jatimulyo ini selanjutnya diinventore dengan menggunakan beragai persamaan allometrik yang telah disusun. Hasil inventore menunjukkan bahwa total biomasa diatas permukaan tanah untuk tegakan jati yang tumbuh di lahan hutan rakyat Desa Jatimulyo sebesar 27,064 ton/ha, setara dengan simpanan karbon sebesar 13,532 ton/ha, dengan luas bidang dasar sebesar 6,1526 m2/ha. Berdasarkan nilai simpanan karbon dan luas bidang dasarnya, potensi tegakan jati yang tumbuh di hutan rakyat Desa Jatimulyo dikategorikan rendah.Kata kunci: Biomasa dan karbon diatas permukaan tanah, jati, hutan rakyat, allometrik.Biomass and Carbon Inventore of Teak (Tectona grandis L.f.) in the Community Forest of Jatimulyo Village, KaranganyarAbstractForests store biomass and carbon in the form of living trees, forest floor detritus (e.g. litter falls), soil and wood products. This study describes inventory results of the above ground biomass of teak (Tectona grandis L.f.) in the community forest of Jatimulyo Village, Karanganyar District. By developing allometric method, the inventory was designed to estimate the potential of above ground biomass of teak in the community forest. To establish the allometric equations, 410 sample trees were measured to determine the relationships between tree height (H) and diameter of breast height (D). Ten trees of various sizes were cut to measure the above ground biomass (stem, branch and leaves). The results showed that diameter at breast height ( about 1.3 m above the ground, D) was a good predictor of tree height (H) with r2 more than 0.8886. When D was combined with H, r2 was improved somewhat for the stem, branch and total above ground biomass, suggesting the growth patterns of tree dimensions were closely interdependent. Carbon storage of the teak forests was based on the assumption that carbon (C) concentration was 50% of the biomass. A standing stock of the above ground biomass of teak in the community forests of Jatimulyo Village was then inventoried based on the allometric relations. Results showed that the above ground biomass of teak in these community forests were 27.064 ton/ha, equal to 13.532 ton carbon/ha, with a basal area of 6.1526 m2/ha. Based on the carbon stock and basal area, the teak community forests of Jatimulyo Village are categorized as having low stand potential.
Konservasi Global, Taman Nasional dan Praktek Lokal di Pulau Siberut, Sumatera Barat Darmanto Darmanto
Jurnal Ilmu Kehutanan Vol 5, No 1 (2011)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1068.558 KB) | DOI: 10.22146/jik.582

Abstract

Taman Pulau SIberut (Sumatera Barat) dikenal memiliki keanekaragaman hayati tinggi. Dengan luas 403.500 ha, pulau ini mengandung jenis-jenis endemik (terutama primatanya), keunikan ekologi dan dihuni ‘masyarakat adat’ yang diasumsikan memiliki pengetahuan ekologi tradisional. Pendekatan politik ekologi dan metode etnografi digunakan untuk memaparkan sejarah dan praktek konservasi Siberut. Wacana konservasi Siberut sangat dipengaruhi narasi krisis biologi global, penelitian ilmiah dan kebijakan pemerintah. Pemantapan wacana konservasi mewujud dalam pembentukan taman nasional tahun 1993 melalui proyek PKAT dengan dana hutang Bank Pembangunan Asia. Isu konservasi  tidak mudah diterapkan dan seringkali tidak sesuai dengan praktek lokal dan pandangan orang Siberut sendiri mengenai bagaimana keanekaragaman hayati seharusnya ditata dan dikelola. Masyarakat siberut memiliki interpretasi, artikulasi dan memproduksi makna konservasi yang berbeda dengan pegawai taman nasional dan actor-aktor lain dari luar. Hubungan antara orang Siberut dengan taman nasional diwarnai ciri negosiatif, mendua dan tidak stabil. Negosiasi makna mengenai bagaimana sumberdaya dikelola dari actor yang berbeda-beda kepentingannya menghasilkan dilemma konservasi.Kata kunci: Konservasi, politik ekologi, taman nasional, praktek lokal, siberut.Global Conservation, National Park and Local Practices in Siberut Island, West SumateraAbstractSiberut Island (West Sumatra) has high profile for conservation. This island of 403,500 ha has endemic species, ecological uniqueness and indigenous peoples assumed to have traditional ecological knowledge. Using ecological politics, this article will describe history of biodiversity conservation in Siberut. Discourse of Siberut conservation influenced by biological crisis narrative in the global context, scientific research and government policy. Conservation discourse was institutionalized during national parkestablishment in 1993 together with PKAT project and foreign debt from Asian Development Bank Nevertheless, conservation issue is not easy to implement in the local context and coherent with local practice. Indigenous people of Siberut interpret, articulate and produce meaning for conservation differently with other actors. The relationship between indigenous peoples and conservation issue has been characterized with negotiable features, ambiguity and instability. Meaning negotiation on how resources should be managed by actors with different interests resulted in dilemma of conservation.
Pengaruh Gibberellin (GA4) terhadap Waktu Perkecambahan dan Pertumbuhan Tinggi Semai Cendana (Santalum Album Linn.) Asri Insiana Putri; Toni Herawan
Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3989.827 KB) | DOI: 10.22146/jik.821

Abstract

Effect of Gibberellins (GA4) on Germination Time and Height of Cendana (Santalum album Linn.) The hemiparasite Santalum album Linn. (cendana) grows very slow, in nature the rare and difficult seeds need stimulation to germinate. Gibberellins (including GA4) are growth regulators, usually used to increase growth as well as to break seed dormancy. The objectives of this research were to investigate the influence of gibberellins on germination percentage and height of cendana growth. Experiment was laid out in a Completely Randomized Design with 3 replicates of 300 seeds for germination percentage and 3 replicates of 10 seeds for seedling growth. Gibberellin was applied as treatment with 100, 300, and 500 ppm. The seed germination was recorded until 9 weeks, and height of plants measured until 8 months at the greenhouse. The results showed that the addition of gibberellins at all treatment increased the percentage of germination and caused the seeds germinated four weeks earlier than the control. In the first 4 months, 500 ppm gibberellins gave the highest acceleration of germination, afterward all treatments have relatively the same influences. Gibberellins gave positive effect on height of cendana growth. After 7 months, the growth decreased although all gibberellin treatments gave higher growth than the control.
Participatory Indicators of Success of Community Forestry Programs in Uganda Buyinza Mukadasi
Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6599.601 KB) | DOI: 10.22146/jik.822

Abstract

In Uganda, a large diversity of community initiated forest management systems have evolved recently in response to severe degradation of forests and grazing land and biomass shortages. Forestry professional, forest user group and farmers were organized in June 2004 to develop commonly agreed indicators of the performance of Community Forestry Program in Uganda. Indicators, such as access to fuel wood, incidence of forest fire and amount of community funds raised through the sale offorest products are commonly agreed at local level. Women participation in forestry related meetings and taste of drinking water in the watershed area are also important. Equitable benefit sharing by the community forest users serves as an indicator of better access to forest products. Socio-economic changes such as women participation in forest related decision-making, income generated from community forests, and equity of benefits from community forests also, reflect the program success.
Evaluasi Pertumbuhan Semai Beberapa Provenan Sungkai (Peronema Canescens Jack) di Kalimantan Selatan Gusti Muhammad Hatta
Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3986.945 KB) | DOI: 10.22146/jik.830

Abstract

Growth Evaluation of Several Provenances of Sungkai (Peronema Canescens Jack) Seedlings in South KalimantanSungkai (Peronema canescens Jack) is among the species recommended for industrial forest plantation (IFP) by the Ministry of Forestry. Despite this fact, very little is known about the extent of genetic variation in wild populations and few attempts, if any, have been made at genetic improvement. Sungkai cuttings are collected wherever available, rather than companies seeking high-quality stockplants. No effort  has been made to increase the quality of cuttings by collecting them from different geographical origins (provenance test). Cuttings from five provenances in South Kalimantan were tested at nursery stage in order to indent6 the best provenance. The result showed that all provenance had a 100% survival rate. Kandangan provenance was the fastest in finishing shoots formation. There is no significant difference in term of shoot length however, in average, provenances from Tambarangan and Tanjung had longer shoots, i.e. 31 cm and 30.65 cm, respectively.
Model Tajuk Jati (Tectona Grandis L.f) dari Berbagai Famili pada Uji Keturunan Umur 9 Tahun Jany T. Raharjo; Ronggo Sadono
Jurnal Ilmu Kehutanan Vol 2, No 2 (2008)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3633.529 KB) | DOI: 10.22146/jik.834

Abstract

Crown Model on Several Family of   9 years old  of Teak (Tectona grandis L.f) Progeny TrialCrown plays an important role in regulating the rate of tree growth through the photosynthesis process. Furthermore it can be used to measure stand density and to determine the availability of growing space. Because of the difficulty  and time consuming in direct crown measurement, the development of crown model is needed. The objectives of this study were to develop crown models of teak (Tectona grandis) of 9 years old from selected open pollinated families and to identifi) the variations of crown models among them.The study was conducted in an open pollinated progeny test located at the compartment 49a, RPH Sidowayah, BKPH Kedunggalar, KPH Ngawi. The experimental unit was family. Five families with the best average of stem diameter at breast height were selected as samples. Crown models were developed and variations of crown model were tested with analysis of variance.The crown model of teak can be divided into two sections. The upper crown representing the light crown section followed parabolic model while the under crown representing the shaded crown section followed linear model. No differences in crown model were found among families. The proposed models are:light crown section, paraboloid : Rl =1.91 * hl0.33shaded crown section, linear .. Rs = -0.75 + 0.57 hswhere Rl is light crown radius (m), hl is the height of light crown section (m), Rs is shaded crown radius (m) and hs is the height of shaded crown section (m) 

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