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Jurnal Ilmu Kehutanan

jikfkt
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Published by Universitas Gadjah Mada

ISSN : 01264451 EISSN : 24773751 DOI : https://doi.org/10.22146/jik.28284

Core Subject : Science, Agriculture, Social,

Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Environmental Science

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

Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ekologi

Articles 6 Documents

Search results for , issue "Vol 7, No 2 (2013)" : 6 Documents clear

Kandungan Unsur Hara Daun Pinus Merkusi Jungh. et de Vriese dan Sifat-sifat Tanah di Tegakan dengan Produksi Getah yang Bervariasi Haryono Supriyo; Daryono Prehaten
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Secara ekonomi, peranan tegakan Pinus dari tahun ke tahun meningkat dari nilai getahnya dan telah menjadi produk unggulan di Perum PERHUTANI. Di beberapa KPH produksi getah antara petak satu dengan petak lainnya mempunyai variasi yang cukup besar, padahal berasal dari bibit yang sama. Penelitian ini bertujuan untuk mencari sifat tanah dan iklimnya yang berakibat pada kandungan hara daun yang diduga sebagai penyebab perbedaan produksi getah. Penelitian dilakukan di Ngablak dengan produksi getah rendah (<4 g/pohon/3 hari), sehingga sudah tidak disadap lagi dan RPH Grabag dengan produksi getah lebih tinggi (<4 g/pohon/3 hari), sehingga sudah tidak disadap lagi dan RPH Grabag dengan produksi getah lebih tinggi (>>15 g/pohon/3 hari), kedua RPH terletak di KPH Kedu Utara. Penelitian dilakukan dengan membuat profil tanah pada masing-masing petak dengan 3 ulangan. Sampel daun segar diambil dengan memanjat pohon dengan memotong rantingnya, daun dan dianalisis unsur hara makro dan mikro. Hasil menunjukkan bahwa pada pinus di Ngablak terletak pada elevasi rata-rata 1.213 m dpl dan di Grabag pada elevasi 908 m dpl. Ketebalan solum di Ngablak hanya 60 cm, warna tanahnya lebih cerah (yellowish red) dan di dalam profil tanah terdapat banyak batu-batu yang keras, sedangkan di Grabag mempunyai solum > 90 cm, warna tanah lebih kelam (dark brown) dan tidak ada bahan kasar di dalamnya. Biomassa sersah, tinggi dan diameter di Ngablak hanya 1.317 ton/ha, 19,3 m dan 20,8 cm, sedangkan di Grabag 6.857 ton/ ha, 31,6 m dan 20,8 cm. Kandungan Mg dan Mn di Ngablak 0,14 ppm dan 86 ppm, sedangkan di Grabag 0,27 ppm dan 283 ppm. Kandungan unsur hara C, N, P, K, Ca, Na, Fe, Cu dan Zn relatif tidak begitu berbeda.Katakunci: Pinus merkusii, produksi getah, unsur hara, elevasi, sifat tanah Nutrient Content of Pinus merkusi Jungh. et de Vriese Leaf and Its Soil Properties under Varied Resin Production Levels of StandsAbstractEconomically, the role of pine stands increased because of the value of the resin. The resin has been a flagship product of Perum PERHUTANI. In some areas, resin production varied among compartments. The variation is quite large even the trees were from the same seed origins. This study aimed to study the soil properties and climate, which results in variation of leaf nutrient content. Those were predicted as the cause of differences in the production of resin. The study was conducted in both RPH Ngablak (lower resin production, (<4 g/tree/3 d) and RPH Grabag (higher resin production, (>15 g/tree/3 d), which are located in KPH Kedu Utara. Soil samples were taken in each compartment with three replications. Fresh leaf samples were collected and analyzed for the macro and micro nutrients. The results showed that the pine in Ngablak lies at an elevation of about 1,213 m, while in Grabag it lies on 908 m above sea level. The thickness of the soil’s solum in Ngablak was only 60 cm. The soil was brighter in colors (yellowish red) and many hard stones were found in soil’s profile. Whereas in Grabag the solum was > 90 cm, dark in color (dark brown) and no coarse material in the soil’s profile. Litter biomass, trees height and diameter in Ngablak were only 1,317 tons/ha, 19.3 m and 20.8 cm, respectively. While in Grabag, the litter biomass, trees height and diameter were accounted for 6,857 tons/ha, 31.6 m and 20.8 cm, respectively. The leaf content of Mg and Mn in Ngablak were 0.14 ppm and 86 ppm, respectively, while in Grabag were accounted for 0.27 ppm and 283 ppm, respectively. Nutrient content of C, N, P, K, Ca, Na, Fe, Cu and Zn in both areas were no significant different.

Normalitas Tegakan Berbasis Resiko untuk Pengaturan Kelestarian Hasil Hutan Tanaman Jati di Perum Perhutani Rohman Rohman; Sofyan P Warsito; Ris Hadi Purwanto; Nunuk Supriyatno
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Hutan tanaman jati yang dikelola oleh Perum Perhutani, dalam berbagai keadaan termasuk kondisi yang relatif aman, selalu memiliki resiko kerusakan yang menyebabkan menurunnya kualitas kelas hutan produktif ke arah tidak produktif. Penelitian ini bertujuan untuk mengetahui standar kenormalan hutan tanaman jati yang mempertimbangkan resiko kerusakan sebagai dasar pengaturan kelestarian hasil. Penelitian ini dilaksanakan di KPH Randublatung Perum Perhutani Divisi Regional Jawa Tengah. Resiko kerusakan (casualty per cent) didekati dari angka kerusakan tegakan berdasarkan data seri selama 4 jangka perencanaan mulai jangka 1983/1992 sampai jangka 2013/2022. Normalitas tegakan didekati dari luas tegakan yang harus dibangun, sedemikian sehingga diperoleh hasil tahunan yang realtif sama dengan mempertimbangkan casualty per cent. Hasil penelitian menunjukkan bahwa luas hutan normal ideal tanpa mempertimbangkan resiko kerusakan di KPH Randublatung dengan luas untuk produksi 27.359,4 ha dan daur 60 tahun adalah sebesar 456,0 ha per tahun. Dengan mempertimbangkan casualty per cent, luas hutan normal berbasis resiko di KPH Randublatung sebesar 229,5 ha per tahun atau 50,3% dari luas normal ideal. Untuk memperoleh hasil tahunan yang realtif sama seluas 229,5 ha, struktur luas hutan yang harus dibangun mulai KU I, KU II, KU III, KU IV, KU V, dan KU VI berturut-turut sebesar 6.875 ha; 5.784 ha; 4.711 ha; 3.997 ha; 3.232 ha dan 2.761 ha.Katakunci: casualty per cent, hutan normal, Perum Perhutani, hutan tanaman jati Risks-based Stand Normality for Sustainable Yield Forest Plantation in Perum PerhutaniAbstractIn any situation, either secure or insecure, teak forest plantations encounter high risks due to ecological and social disturbances, causing degradation and decrease their normality in terms of areas and standing stock. This research aimed to determine the normality standard of teak forest plantations under risks as a basis for better sustained yield regulation. This research was conducted in forest management unit (FMU) of Randublatung, state-owned forest company (Perhutani), located at Central Java. The risk of forest damages, called casualty per cent, was calculated using a series of age class structures based on a 10-year periodic forest inventory for four sequential planning periods:1983/1992, 1993/2002, 2003/2012,to 2013/2022. The normal forest was determined based on the stands area basis, which was defined based on the final cutting area that already incorporates casualty per cent, in such a way that each year the newly planted forests areas have relatively the same number. The results showed that without casualty per cent, the normal forest built every year in FMU Randublatung was 456 ha/year for a 60-year rotation cycle. However, by incorporating the damage risks (casualty per cent), the normal forest area in KPH Randublatung should be built only 229.5 ha/year or just 50.3% of the current planning. Furthermore, in order to obtain this annual harvesting, the normal forests should have age classes structures from age class I, II, III, IV, V, and VI, in such a way that their areas equal to 6,875 ha, 5,784 ha, 4,711 ha, 3,997 ha, 3,232 ha, and 2,761 ha, respectively.

Pengawetan Kayu Gubal Jati Secara Rendaman Dingin dengan Pengawet Boron untuk Mencegah Serangan Rayap Kayu Kering (Cryptotermes cynocephalus Light.) Afif Sumaryanto; Sutjipto Achmad Hadikusumo; Ganis Lukmandaru
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Pada penggunaan kayu jati umur muda, umum diketahui bahwa bagian gubal banyak diserang oleh rayap kayu kering karena keawetan alaminya yang rendah. Asam borat dan boraks merupakan salah satu pengawet yang mengandung bahan aktif boron yang murah, mudah didapat, tidak berbau, dan tidak mengubah warna kayu. Bahan yang digunakan adalah bagian gubal papan jati yang diperoleh dari tebangan jati hutan rakyat di Kecamatan Kali Bawang, Kulon Progo. Penelitian ini menggunakan rancangan acak lengkap yang disusun secara faktorial dengan dua faktor yaitu faktor jenis bahan pengawet yaitu asam borat dan boraks (konsentrasi 5 %) dan faktor lama perendaman (12, 24, 36, dan 48 jam). Rayap yang digunakan untuk pengujian keawetan contoh uji pada penelitian ini adalah rayap kayu kering (Cryptotermes cynocephalus Light.) Hasil penelitian menunjukkan kisaran hasil rerata nilai pada parameter absorbsi sebesar 33,09 – 70,77 kg/m3 , nilai retensi sebesar 3,81 – 10,77 kg/m3 , kedalaman penetrasi 2,34 – 3,86 mm, mortalitas rayap sebesar 46,33 – 53 % selama 2 minggu dan 82,67 – 94,33 % selama 4 minggu pengumpanan, pengurangan berat sampel sebesar 0,56 – 0,57 gram, serta derajat kerusakan sebesar 30,34 – 31,27 %. Hasil analisis sidik ragam menunjukkan bahwa terdapat interaksi antara faktor jenis bahan pengawet dan lama perendaman yang berpengaruh nyata terhadap mortalitas rayap. Faktor jenis bahan pengawet berbeda sangat nyata terhadap absorbsi dan penetrasi. Faktor lama perendaman berbeda sangat nyata terhadap absorbsi, retensi, penetrasi. Pemberian bahan pengawet mampu mengurangi kehilangan berat sampai sekitar 70 % serta memberi persentase kematian rayap yang lebih tinggi (87-92 %) dibandingkan gubal tanpa perlakuan.Katakunci: Tectona grandis L.f., gubal, pengawetan kayu, boraks, rendaman dingin, Cryptotermes cynocephalus Light Preservation of Teak Sapwood by Cold Soaking Using Boron Against Drywood Termite (Cryptotermes cynocephalus Light.) Attacks.AbstractThe utilization of younger teakwood has a disadvantage, which is the sapwood is more susceptible to dry wood termites as it has less natural durability. Boric acid and borax are inexpensive preservatives, which contain boron as the active material. Those preservatives are also easy to be obtained as well as do not produce smells and the wood discoloration. The experiment materials were the sapwood parts from teak boards obtained from the felled trees in the community forest of Kali Bawang, Kulon Progo. A complete randomized block design was arranged in a factorial with two factors, which were the type of preservatives (boric acid and borax in 5% concentration) and duration of cold soaking (12, 24, 36, and 48 hours). To examine the durability of sample, dry wood termites (Cryptotermes cynocephalus Light) were used. The results showed that the average values of absorption, retention, and depth of penetration were 33.09 to 70.77 kg/m3, 3.81 to 10.77 kg/m3, and 2.34 to 3.86 mm, respectively. The average values of termite mortality during 2 weeks and 4 weeks were 46.33 to 53 %, 82.67 to 94.33 %. Weight reduction and degree of the damage were, 560 to 570 mg, and 30.34 to 31.27 %, respectively. By analysis of variance, there was an interaction between the type of preservatives and the duration of cold soaking factors, which affected significantly the termite mortality. Type of preservative affected significantly the absorption and penetration. Further, the duration of cold soaking affected significantly the level of absorption, retention and penetration. The application of preservatives could reduce the mass loss of specimens until 70 % as well as to give higher levels of mortality rate (87-92 %) compared to that of untreated one.

Studi Mutu Kayu Jati di Hutan Rakyat Gunungkidul I. Pengukuran Laju Pertumbuhan Sri Nugroho Marsoem
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Kabupaten Gunungkidul menyimpan potensi sebagai penyedia kayu jati sebagai bahan baku industri dari hutan rakyatnya. Penelitian ini bertujuan untuk mengetahui besarnya laju pertumbuhan dan riap pohon jati di hutan rakyat di Kabupaten Gunungkidul serta dihubungkan dengan faktor hujan. Tempat tumbuh yang diamati yaitu Panggang, Playen dan Nglipar. Pengamatan dilakukan selama 3 tahun, yaitu periode I (Oktober 2009-September 2010), periode II (Oktober 2010-September 2011), dan periode III (Oktober 2011-September 2012). Pengukuran diameter pohon dilakukan setiap akhir bulan pada 3 kelas diameter pohon, yaitu besar, menengah dan kecil, dengan ulangan 5 pohon tiap kelasnya. Hasil pengamatan menunjukkan rerata riap diameter tertinggi sebesar 2,21 ± 0,52 cm/tahun diamati di Panggang untuk kelas diameter besar sedangkan nilai terendah sebesar 0,33 ± 0,19 cm/tahun diamati di Nglipar yaitu untuk kelas diameter kecil. Kelas diameter besar memberikan nilai riap yang tertinggi. Pertumbuhan saat periode I hampir semua menunjukkan tertinggi pada semua tempat tumbuh dan kelas diameter. Secara umum, pengukuran riap bulanan menunjukkan adanya pertumbuhan minim dan minus antara Mei-September, puncak pertumbuhan antara Nopember-Februari. Korelasi Pearson antara riap dan curah/hari hujan untuk semua data menunjukkan korelasi sangat nyata antara riap bulanan dengan curah hujan (r = 0,24) atau hari hujan (r = 0,28). Korelasi data berdasarkan faktor tempat tumbuh memperoleh derajat korelasi tertinggi (r = 0,67) yang diamati di Playen khususnya di periode II. Rendahnya derajat korelasi secara umum mengindikasikan beberapa faktor lain perlu diperhitungkan untuk mengetahui kecenderungan pertumbuhan pohon hutan rakyat Gunungkidul.Katakunci: Tectona grandis, laju pertumbuhan, riap, Gunungkidul, curah hujan A Study of Teakwood Quality Grown in Community Forests in Gunungkidul, I. Measurement of Growth-RateAbstractGunungkidul regency has a potentiality to be a producer of teak wood as raw materials for industrial purposes. This study aimed to find out the growth-rate and increment levels of teak trees from community forests in Gunungkidul regency and to correlate it with the rainfall factor. Three observed sites were Panggang, Playen and Nglipar. The observation was conducted during 3 years, i.e. 1st period (October 2009-September 2010), 2nd period (October 2010-September 2011), and 3rd period (October 2011-September 2012). The measurements of diameter were performed on trees in 3 diameter classes (high, middle, small) every in the end of the month by 5 replications of each class. The results were the highest average of diameter increment were 2.21 + 0.52 cm/year observed in Panggang for high diameter class as the lowest level was 0.33 + 0.19 cm/year observed in Nglipar for small diameter class. High diameter class showed the highest increment values. Most of the growth-rate levels of 1st period were the highest in every sites and diameter classes. Generally, the measurement of monthly increment showed the minimum or minus growth between May and September, the highest increment peaks were measured during November – February. Pearson’s correlation for all the data between the rates of increment and rainfall (r = 0.24) or rainy day (r = 0.28) were significant. Data correlation on the basis of gowth-sites showed the highest degree which were observed in Playen, especially in the 2nd period. The weak correlation generally indicates the other factors should be considered to discover the trend of the growth of teak trees in the community forests of Gunungkidul regency.

Pengaruh Pakan dan Bahan Peluruh Serisin terhadap Filamen Terurai Kokon Ulat Sutera Emas Cricula trifenestrata Helf Terry M Frans
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Tujuan penelitian untuk melihat pengaruh pakan dan bahan peluruh serisin, terhadap filamen terurai kokon ulat sutera emas Cricula trifenestrata Helf. Penelitian ini diharapkan dapat menemukan teknologi penguraian filamen pada tahap pemintalan benang, sebagai bahan baku pembuatan kain sutera. Penelitian menggunakan percobaan faktorial dalam rancangan acak lengkap (RAL) untuk melihat interaksi dari kedua faktor perlakuan yaitu jenis pakan dan jenis bahan peluruh serisin. Variabel yang diamati adalah panjang filamen terurai per kokon (cm), jumlah potongan filamen terurai per kokon (helai), dan panjang filamen perpotongan (cm/helai). Penelitian memberikan hasil bahwa kombinasi perlakuan jenis pakan daun alpukat dan bahan peluruh serisin sabun dengan abu kayu memberikan pengaruh yang terbaik terhadap rata-rata panjang filamen terurai per kokon, rata-rata jumlah potongan filamen per kokon, dan rata-rata panjang filamen perpotongan. Dengan demikian kombinasi perlakuan ini dapat disarankan dalam proses penguraian kokon.Katakunci: sutera, Cricula trifenestrata, serisin, filamen, kokon. Effects of Fodder and Sericin Degumming Agents on Asunder Filament of Golden Silkworm Cocoon of Cricula trifenestrata HelfAbstractThe research aim was to obtain the effect of fodder and sericin degumming agents on asunder filament of golden silkworm cocoon of Cricula trifenestrata Helf. This study expected to find an asunder filament technology in the yarn spinning phase, as the material of silk textile. The complete random design was used to find the interaction between two treatment factors of fodder types and sericin degumming agents. The length of asunder filament per cocoon (cm), the amount of pieces of asunder filament per cocoon (sheet), and the length of filament per piece (cm/sheet) were evaluated. The combination between avocado leaf and soap sericin degumming agent with wood ashes treatment showed the best results on the average of the length of sericin emitec filament asunder per cocoon, the average amount of filament pieces per cocoon, and the average filament length per piece. Therefore, the treatment combination is recommended on the cocoon asunder process.

Perubahan Struktur dan Komposisi Hutan Rawa Gambut Menggunakan Citra Penginderaan Jauh dan Pendekatan Ekologis di Kawasan Bekas Pengembangan Lahan Gambut Provinsi Kalimantan Tengah Raden Mas Sukarna
Jurnal Ilmu Kehutanan Vol 7, No 2 (2013)
Publisher : Fakultas Kehutanan Universitas Gadjah Mada

Pengembangan lahan gambut (PLG) satu juta hektar untuk lahan pertanian antara tahun 1995-1998 di Provinsi Kalimantan Tengah telah menyebabkan perubahan yang nyata terhadap struktur dan komposisi hutannya, dan secara langsung memberikan dampak terhadap keseimbangan fungsi ekologisnya. Perubahan hutan rawa gambut (HRG) yang relatif cepat belum sepenuhnya dapat diikuti dengan kegiatan evaluasi riil, karena luasnya kawasan dan akses yang terbatas. Penelitian ini bertujuan untuk memperkirakan perubahan struktur dan komposisi HRG antara tahun 2003-2010 menggunakan teknik penginderaan jauh dan pendekatan ekologis dikawasan bekas PLG dengan luas ± 368.000 ha. Hasil penelitian menunjukkan bahwa aplikasi citra penginderaan jauh melalui model kerapatan kanopi hutan, berhasil menentukan klasifikasi dan distribusi perubahan struktur dan komposisi HRG dan kondisi ekologisnya secara efektif. Kawasan HRG dengan kondisi ekologis alamiah dan sub alamiah telah berkurang luasnya sebesar 1,49 %, kawasan hutan semi alamiah dan transisi ke semi alamiah bertambah luasnya sebesar 3,69 %, dan kawasan hutan transisi dan non alamiah bertambah luasnya sebesar 4,39 %. Fakta ini menggambarkan bahwa kawasan HRG bekas PLG saat ini mengalami penurunan keragaman jenis-jenis endemik dengan indeks antara 0,5 - 2,5 yang mengakibatkan kurang stabilnya fungsi ekologi atau ekosistemnya.Katakunci: hutan rawa gambut, penginderaan jauh, ekologi, struktur dan komposisi hutan Structural and Composition Changes of Peat Swampeat Forests Using Remote Sensing and Ecological Approaches at the Abandoned Peat Development Site in Central Kalimantan ProvinceAbstractPeatland project of one million hectares to agricultural land between 1995 and 1998, the so-called Mega Rice Project (MRP) in Central Kalimantan province, have significantly changed both structure and composition of peat swamp forest (PSF) as well as the balance of ecological functions. These quick changes have not been fully followed by real evaluation activities due to large area and limited access. To answer these problems, this study aimed to estimate these changes between 2003 and 2010 using remote sensing techniques and ecological approach on approximately 368,000 ha of ex-MRP area. The results showed that the application of remote sensing imagery through Forest Canopy Density (FCD) models were able to determine both forest classification and distribution effectively, including its ecological conditions. The natural and sub-natural PSF area had decreased by 1.49%, semi natural and its transition increased by 3.69%. Non natural and its transition increased by 4.39%. These facts illustrate that PSF on ex-MRP area was decreasing in term of its endemic species diversity with index between 0.5 and 2.5. Consequently, its ecological or ecosystem functions were also unstable.

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Home Page

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Contact Name Tri Mulyaningsih

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Editorial Address https://jurnal.ugm.ac.id/jikfkt/about/editorialTeam

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

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Contact Name
Tri Mulyaningsih

Contact Email
trimulya@unram.ac.id

Phone
+62274-512102

Journal Mail Official
jik@ugm.ac.id

Editorial Address
https://jurnal.ugm.ac.id/jikfkt/about/editorialTeam

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA