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INDONESIA
MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management
Published by Institut Pertanian Bogor
ISSN : 20870469     EISSN : 20892063     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Manajemen Hutan Tropika is a periodic scientific articles and conceptual thinking of tropical forest management covering all aspects of forest planning, forest policy, utilization of forest resources, forest ergonomics, forest ecology, forest inventory, silviculture, and management of regional ecosystems.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol. 5 No. 1 (1999)" : 7 Documents clear
Pathogenicity of Rhizoctonia solani Achmad; Hadi, Soetrisno; Herliyana, Elis Nina; Setiawan, Agus
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Pathogenicity of Rhizoctonia solani was studied by evaluating the ability of the pathogen to attack several ages of Pinus merkusii and Acacia mangium seedlings. Results showed that R. solani attacked P. merkusii from seed stage up to seven week-old seedlings, while eight week-old ones were free from the pathogen’s attack. On A. mangium, 16 day-old seedlings were uninfected by R. solani, while 12 day-old ones were still attacked by the pathogen. Pathogenesis of R. solani was also studied by evaluating the activities of cellulolytic and pectolytic enzymes produced by the fungi and compared them with the activities of the same enzymes produced by Fusarium oxysporum. Result showed that R. solani’s cellulolytic enzymes activity, reflected by the activity of C1-cellulase, was lower compared with that of F. oxysporum. On the other hand, R. solani was more intensive degrading pectin medium than F. oxysporum, such phenomenon reflected higher activity of pectolytic enzymes activity of R. solani compared with that of F. oxysporum.
Prospek Pengendalian Terpadu Penyakit Lodoh pada Persemaian Tanaman Kehutanan Achmad
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Damping-off is one of the diseases that decreases the seedling quantity of most forest trees. Up till now, control of damping-off by using fungicides is widely applied. However, excessive usage of fungicides is harmful for human beings, animals, as well as environment. Integrated management is expected to be applied in managing damping-off on forest-tree seedlings. This prospect is shown by several choices of techniques to handle the disease other than chemical handling by using fungicides, as mentioned in this paper. However, efforts to make the prospect to be achieved are still needed. Focused and well-planned research must be done to combine compatible techniques to support integrated management of damping-off on forest-tree seedlings.
The Establishment of Forest Plantation Widowati, Arti; Haneda, Noor Farikhah
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

The establishment of forest plantation of Eucalyptus deglupta in the humid tropic, for pulp and paper industry has so far been hindered seriously by insect stem borer larvae (Zeuzera coffeae ), damaging young and mature stands, and cause important financial lost. Coupling with integral forest pest management and good silvicultural treatements, a strategy for resistance breeding program to stem borer larvea need to be developped for that promising species, in order to establish sound industrial plantation and to accelerate genetic gain achievement per unit time. This study deal with the assement of E. deglupta woods properties, (including anatomical, physicals properties, and chemical substances), that may supposedly be directly implied in resistency mechanisms of Leda againts insect stem borer attack. The preliminary results indicated that sound, tolerant and resistant indvidual trees tend to have higher wood density, than unhealty one. Sound, resistant and tolerant trees tend also to have greater and statistically different in fiber length, fiber diameter, cells walls thickness and lumen diameter than that of unhealty one, especially from that one that have been fortly attacked by stem borer. The preliminary results also indicated that resistance trees tend to exhibit more alcaloid, terpenoid and flavonoid content than the unhealty one. However, the results need to be confirmed by addition of more wood samples to be analyzed for each type of degree of insect injury.
Pembakaran Terkendali Sebagai Metoda Alternatif dalam Pencegahan Kebakaran Hutan di Hutan Tanaman Acacia mangium Saharjo, Bambang Hero
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Prescribed burning was well done in Acacia mangium plantation without any trees damaged or dead and no natural regeneration found in the forest floor after fire. Fuel load 3 ton/ha and fuel bed depth 8 cm can be used as a standard for it. Flame temperature reached from 149 °C and 170 °C, and flame length 0.74-0.93 m can safe the plantation for any damage. Three months after burning there was an accumulation of fuel load in the forest floor, therefore 3 months interval is a good solution in preventing the forest from fire invasion.
Studi Kemampuan Tumbuh Anakan Mangrove Jenis Rhizophora mucronata, Bruguiera gimnorrhiza, dan Avicennia Marina Pada Berbagai Tingkat Salinitas Eben Ezer Hutahaean; Cecep Kusmana; Helmy Ratna Dewi
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Salinity is one of environmental factors having an important role in controlling mangrove growth. Our research results show that the degree of salinity has significant effect on the height seedling growth of Rhizophora mucronata, Bruguiera gimnorrhiza and Avicennia marina. Its salinity has also significant effect on the leaf growth of two later species. In general, the highest growth of both seedling’s height and the number of leaf for all species occur on the salinity ranged from 0.0 to 7.5 ppt.
Pengkajian Penerapan Teknik Budidaya Rhizophora mucronata dengan Stek Hipokotil Mulyani, Neni; Kusmana, Cecep; Supriyanto
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Research on the vegetative propagation of Rhizophora mucronata using hypocotyl cutting sistem was carried out at Faculty of Forestry, Bogor Agricultural University. Histological analysis of adventitous shoot was done at Biotechnology and Tree Breeding Laboratory, SEAMEO-BIOTROP. Three types of hypocotyl cutting (complete hypocotyl, top part of cut-hypocotyl and bottom part of cut-hypocotyl) were induced using 6-BAP hormones at 0 and 500 ppm. Adventitous shoot of bottom part of cut-hypocotyl appeared 140 days after planting. Shoot from complete hypocotyl and top part of cut-hypocotyl grew earlier than adventitous shoot from bottom part of cut-hypocotyl. Hystologycal analysis of adventitous shoot showed the existance of primary meristem, stipule and leaf primordia. The growth of complete hipocotyl was higher than both of top part of cut-hypocotyl and bottom part of cut-hypocotyl. There was no effect of hormone induction on the shoot growth of them.
Anatomi Jaringan Kayu Terserang Penyakit Lapuk Kayu Teras Nuhamara, Simon Taka; Hadi, Soetrisno
Jurnal Manajemen Hutan Tropika Vol. 5 No. 1 (1999)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

A study was undertaken to determine the anatomical structures of decaying heartwood in the stem part of Acacia mangium Willd where the branch stubs were found. Sections of the decaying heartwood were made and the microscopical features were recorded. Compartmentalization of the decaying heartwood was observed and the walls of the compartment is characterized by the discoloration of the wood tissues suspected to be associated with the blocking of the vessels and pits, formation of tylosis, deposition of gum, and formation of axial parenchyma. The branch stub on the stem is known to be the entry point for different microorganisms leading to the heart-rot development by heartwood decaying fungi.

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