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All Journal Indonesian Journal of Forestry Research Jurnal Penelitian Hutan Tanaman Indonesian Journal of Forestry Research
Dede J. Sudrajat
Forest Tree Seed Research Institute, Jl. Ciheulet PO. Box 105 Bogor 16001
Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management

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IDENTIFICATION OF Acacia mangium PROVENANCES FOR SOLID-WOOD FOREST PLANTATIONS Nurhasybi, Nurhasybi; Sudrajat, Dede J.; Diatna, Komar
Indonesian Journal of Forestry Research Vol 6, No 1 (2009): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

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Abstract

Provenance trial is a planting test aimed at fi nding the best provenance for establishing forest plantations. Such best provenance depends on the type of fi nal harvest or yield expected.  The objective of this research was to identify A. mangium provenances that were suitable for forest plantation producing solid woods for construction and furniture. A total of 225 samples of 15 provenances from Papua New Guinea and Australia were planted in three blocks in Parungpanjang, Bogor, West Java. The measured parameters included tree height, clear bole height, stem diameter, tree volume, stem form, branching habit, and crown form. Bi-plot analysis indicated that Kini WP, Keru Village WP, Derideri R. Morehead, and Claudia River were the best provenances in terms of productivity. Correspondence analysis showed that almost all provenances were equally good in stem form, but they varied in branching system as well as crown form.  Provenances Kini WP, Keru Village WP, Kiriwo/Serisa WP, and Bimadebun Village possessed the better branching habit.  In terms of crown form provenances Dimisi Village WP, Kiriwo/Serisa WP, and Derideri R. Morehead exhibited a good performance. In general, fi ve provenances, i.e. Kini WP, Keru Village WP, Derideri R. Morehead, Kiriwo/Serisa WP, and Claudia River were considered appropriate for seed sources supplying seeds for industrial plantation development intended to produce construction and furniture material.
IRADIASI SINAR GAMMA ( Co) UNTUK MENINGKATKAN PERKECAMBAHAN 60 DAN PERTUMBUHAN BIBIT TEMBESU ( Roxb.)Fagraea fragran Zanzibar, Muhammad; Megawati, Megawati; Pujiastuti, Endang; Sudrajat, Dede J.
Jurnal Penelitian Hutan Tanaman Vol 12, No 3 (2015): Jurnal Penelitian Hutan Tanaman
Publisher : Pusat Penelitian dan Pengembangan Hutan

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Abstract

ABSTRACTLow dose gamma irradiation has been applied to improve seed germination and seedling growth for many agricultural crops, but the technique is still limited to be used on tree species. The purposes of this research was (1) tostudy the effect of seed irradiation and storage periods on the germination of tembesu seed, and (2) to determine theeffect of seed irradiation to the seedlings growth. The first experiment was designed in Completely RandomizedDesign (CRD) in a factorial with two factors, i.e. irradiation doses and storage periods. The second experiment usedthe Completely Randomized Design with the treatment of irradiation doses. The results showed that for increasingseed storability, the fresh seeds can be radiated by dose maximum 120 Gy. The best height and diameter seedlinggrowth obtained at dose 30 Gy, it was confirmed by seedling growth enhancement up to 205.84% of height and133.33% of diameter. The irradiation at doses 30 Gy can improve seedling quality of tembesu. ABSTRAKIradiasi sinar gamma dengan dosis rendah telah banyak digunakan untuk memperbaiki perkecambahan benih dan pertumbuhan bibit untuk banyak tanaman pertanian, namun teknik ini masih terbatas untuk diaplikasikan pada jenis- jenis tanaman hutan. Tujuan penelitian ini adalah untuk (1) mempelajari pengaruh iradiasi benih dan periode simpan terhadap perkecambahan benih tembesu, serta (2) mengetahui pengaruh iradiasi benih segar terhadap pertumbuhan bibit tembesu. Percobaan pertama menggunakan Rancangan Faktorial dalam Rancangan Acak Lengkap dengan 2 faktor, yaitu faktor iradiasi dan faktor periode simpan. Percobaan kedua menggunakan rancangan acak lengkap dengan perlakuan dosis iradiasi. Hasil penelitian menunjukkan bahwa untuk meningkatkan daya simpan, benih segar dapat diradiasi dengan dosis maksimal 120 Gy. Hasil iradiasi terhadap pertumbuhan tinggi dan diameter bibit jenis tembesu dicapai pada dosis 30 Gy, dimana perlakuan ini dapat meningkatkan pertumbuhan tinggi sebesar205,84% dan diameter sebesar 133,33%. Iradiasi sinar gamma 30 Gy dapat meningkatkan kualitas bibit jenis tembesu.
IDENTIFICATION OF Acacia mangium PROVENANCES FOR SOLID-WOOD FOREST PLANTATIONS Nurhasybi, Nurhasybi; Sudrajat, Dede J.; Diatna, Komar
Indonesian Journal of Forestry Research Vol 6, No 1 (2009): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2009.6.1.1-16

Abstract

Provenance trial is a planting test aimed at fi nding the best provenance for establishing forest plantations. Such best provenance depends on the type of fi nal harvest or yield expected.  The objective of this research was to identify A. mangium provenances that were suitable for forest plantation producing solid woods for construction and furniture. A total of 225 samples of 15 provenances from Papua New Guinea and Australia were planted in three blocks in Parungpanjang, Bogor, West Java. The measured parameters included tree height, clear bole height, stem diameter, tree volume, stem form, branching habit, and crown form. Bi-plot analysis indicated that Kini WP, Keru Village WP, Derideri R. Morehead, and Claudia River were the best provenances in terms of productivity. Correspondence analysis showed that almost all provenances were equally good in stem form, but they varied in branching system as well as crown form.  Provenances Kini WP, Keru Village WP, Kiriwo/Serisa WP, and Bimadebun Village possessed the better branching habit.  In terms of crown form provenances Dimisi Village WP, Kiriwo/Serisa WP, and Derideri R. Morehead exhibited a good performance. In general, fi ve provenances, i.e. Kini WP, Keru Village WP, Derideri R. Morehead, Kiriwo/Serisa WP, and Claudia River were considered appropriate for seed sources supplying seeds for industrial plantation development intended to produce construction and furniture material.
EFFECT OF GAMMA IRRADIATION ON SEED GERMINATION, STORAGE, AND SEEDLING GROWTH OF Magnolia champaca L. Zanzibar, Muhammad; Sudrajat, Dede J.
Indonesian Journal of Forestry Research Vol. 3 No. 2 (2016): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2016.3.2.95-106

Abstract

Gamma irradiation of seeds is known as an important factor in stimulating biochemical and physiological processes. This paper investigates the effect of seed irradiation on the seed germination, storability, and seedling growth traits of Magnolia champaca. Seeds were irradiated with 0, 5, 10, 15, 20, 40, 60, 80 and 100 Gy by Cobalt-60. The treated seeds were grouped into three lots, namely germination test, storage test and seedling growth characteristics. Observations were made for seed germination percentage, germination index, mean germination time, germination value and growth traits such as height, collar diameter, number of leaves, root length, and dry weight. Results showed that irradiation at a dose of 30 Gy was close to LD50, and irradiation at doses of 80 Gy and higher caused lethal effect. The maximum increase of germination parameters on irradiated seed was recorded at a dose of 10 Gy, and then it decreased. Growth rate in terms of seedling height, collar diameter, number of leaves, and dry weight have also increased in gamma irradiation doses up to 80 Gy, but the dose of 10 Gy resulted in survival and growth that was more stable and gave the highest values for most of the parameters. Hence, lower dose (10 Gy) of irradiation treatment can be used to increase seed germination, storability and seedling growth of M. champaca.
Co-Authors Endang Pujiastuti Komar Diatna Megawati - Muhammad Zanzibar Nurhasybi Nurhasybi