{"id":444,"date":"2006-07-19T23:39:12","date_gmt":"2006-07-19T23:39:12","guid":{"rendered":"http:\/\/envafs.dungnq.local\/2006\/07\/19\/information-on-forest-science-and-technology-number-1-2003\/"},"modified":"2006-07-19T23:39:12","modified_gmt":"2006-07-19T23:39:12","slug":"information-on-forest-science-and-technology-number-1-2003","status":"publish","type":"post","link":"https:\/\/vafs.gov.vn\/en\/information-on-forest-science-and-technology-number-1-2003\/","title":{"rendered":"Information on Forest Science and Technology Number 1 2003"},"content":{"rendered":"

Summaries of papers in the bulletin; for more information contact <\/SPAN>info@fsiv.org.vn<\/SPAN><\/A><\/SPAN><\/SPAN><\/FONT><\/FONT><\/H1>
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<\/FONT><\/B> <\/SPAN>
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Results of research on the relationship between tree species in natural forest <\/FONT><\/B> <\/SPAN>
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(Hoang Van Thang)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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Research on the reciprocal relation between tree species in natural forests is a difficult and complicated job. To develop a precise scientific basis requires a reliance on biological characteristics and a detailed study of the phytotoxin of each tree species. This paper introduces a research method based on the frequency of occurrence of the species. Initially, groups of species were found that commonly occur with Endospermum chinense<\/I>, Lithocarpus fissus<\/I>, Erythrophiseum fordii<\/I> and Canarium album<\/I>. This is a preliminary result providing a basis for selection and combination of species in mixed plantation establishment. <\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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Pulping potential of Pinus caribaea Morelet <\/I>wood planted in Vietnam <\/FONT><\/B> <\/SPAN>
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(Nguyen Huy Son, Hoang Quoc Lam and Dinh Ngoc Ninh)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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P. caribaea Morelet<\/SPAN><\/I> is a recently introduced species to Vietnam. It has far more rapid growth than indigenous pines species such as P. kesiya<\/I>, P. merkusii<\/I> or P. massoniana<\/I>. To provide information on its potential as a raw material for paper making, initial research was carried out on the physical and chemical properties of P. caribaea <\/I>from trees 8—15 years old.. Research showed that the pulping potential and pulp quality of this species is quite high, the density of wood varies from 436—474 kg\/m3<\/SUP> depending on tree age; fibre length is 3.40—3.99 mm; and length\/width ratio (L\/R) is 79—101. Cellulose content is quite high and ranges from 44.8 to 50.7%; lignin content is 25.7—27.7%. The content of water-soluble substances (alcohol and sodium hydroxide) is quite high but this can be overcome.<\/SPAN><\/FONT>
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P. caribaea<\/SPAN><\/I> planted in Vietnam provides raw material of a standard for high quality pulp production, comparable with pine species planted in other countries.<\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN>
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Research on hybridization of selected Melaleuca species <\/FONT><\/B> <\/SPAN>
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(Nguyen Viet Cuong)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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The paper outlines the benefits and need to create hybrids of Melaleuca species in Vietnam. The species studied for hybridization are M. leucadendra, M. cajuputi, M. viridiflora<\/I> and M. quinquenervia<\/I> of a number of different provenances. Preliminary research results show that four hybrid combinations (L18L19, L25L17, L25L9 and L25L2) give faster growth than the best germplasm currently used in production.<\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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Effect of fertiliser application on growth of Eucalyptus on acid sulfate soil in Than Hoa, Long An province <\/FONT><\/B> <\/SPAN>
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(Pham The Dung, Pham Ngoc Co and Fuminori Miyatake)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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Two species selected for paper raw material plantations in the Mekong River Delta are E. camaldulensis<\/I> and E. tereticornis<\/I>. To achieve high wood production it is necessary to apply intensive techniques, including fertilizer application.<\/FONT><\/SPAN>
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This paper summarises the results of research on the effect of fertilizer application on the growth of E. camaldulensis<\/I> and E. tereticornis<\/I>. In a plantation of 3.5-year-old Eucalyptus<\/I>, growth (diameter) increased by 20—30% and height increased by 30—35% compared to non-fertilized trees. This increase in growth was more evident in 5-month-old plantations. The combination of phosphate with NPK gave better growth than a single fertilizer. <\/FONT><\/SPAN>
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The fertility of land planted with Eucalyptus <\/I>decreases after eight years and it is necessary to apply fertilizer to improve soil fertility.<\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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A simple method used to preserve metarhizium products for killing Coptotermes formosanus <\/I><\/FONT><\/B> <\/SPAN>
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(Nguyen Duong Khue)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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Metarhizium <\/SPAN><\/I>products have been prepared from M1, M2 and M5 strains to kill Coptotermes <\/I>but the effectiveness of these products quickly deteriorates with time.<\/SPAN><\/FONT>
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Trials were conducted and a method of preservation of Metarhizium <\/I>products in a closed container devoid of light at room temperature selected. The products remain effective for up to 9 months. The method is simple, easily carried out and highly effective. <\/SPAN><\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN><\/I>
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Effectiveness of forest shelter belts in the sandy coastal areas of North Central Vietnam <\/FONT><\/B> <\/SPAN>
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(Dang Van Thuyet)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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Shelterbelts of Casuarina equisetifolia <\/I>and Acacia auriculiformis <\/I>are badly needed for development of fishery, agriculture and forest production and improvement of the living environment in sandy coastal areas. The protective ability of pure shelterbelts of forestry species depends on the width and height and the compactness of the canopy, ie density (D) of the shelterbelt. With a distance between the main shelterbelts of 80—90 m, D = 50—60m3<\/SUP>, the shelterbelt is not yet truly effective as a windbreak. At maturity of A. auriculiformis<\/I> and C. equisetifolia <\/I>when D>120m3<\/SUP><\/SPAN> , <\/B> <\/SPAN>the shelter is remarkably effective as a windbreak. Before 8am and after 4pm air temperature in the open is lower than in the shelterbelt and the opposite applies between 8am and 4pm. The largest difference in temperature occurs at 1pm. The shelterbelts also return to the soil 0.25—0.7 kg of fallen twigs and leaves per m2<\/SUP>.<\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN>
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Inputs for forestry development with the participation of village and hamlet communities<\/FONT><\/B> <\/SPAN>
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(Hoang Lien Son and Cao Lam Anh)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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Many people are interested in finding suitable measures for sustainable forestry management. This paper describes some models with different forms of each input factor that allows the participants – state forest management boards, forest owners and local communities – to make their own contribution in a participatory forest project. Depending on the type of production, and the relationship between a given forest type and forest land, these models create different organizational mechanisms for project implementation, making clear the role of state forest management boards, consultants, funding personnel and especially foresters in organizing and supporting participatory forest development.<\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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Some economic measures for cottage industry development in Chang Son commune, Thach That district, Ha Tay province <\/FONT><\/B> <\/SPAN>
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(Tran Duy Ruong and Hoang Lien Son)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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This paper outlines the role of the cottage industry in Chang Son, Thach That, Ha Tay as part of socio-economic development for the local people by creating more employment for labourers.<\/SPAN><\/FONT><\/SPAN>
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The paper deals with the situation of the cottage industry in Chang Son commune, Ha Tay province and proposes some basic measures aimed at encouraging and developing this industry.<\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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Results of research on the design of bamboo chip production machinery for pulp production in paper making <\/FONT><\/B> <\/SPAN>
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(Nguyen Manh Hoat)<\/FONT><\/SPAN>
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<\/FONT><\/SPAN>
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At present, production of bamboo chips is mainly carried out in the mill. This results in high transport costs and requires a large landing area. However, bamboo chips produced by hand do not meet the required quality standards. For this reason, a research project was carried out to look at developing a machine to produce bamboo chips in the field. <\/FONT><\/SPAN>
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The machine developed was tested and put into operation at Bac Giang. For the past 15 months it has operated well, meeting the technical requirements regarding productivity and bamboo chip quality. The MBT-3A machine is suitable for production of household-scale bamboo chip production. It is capable of producing 3 t of fresh bamboo chips per hour and is neatly built with stable operation.<\/FONT><\/SPAN>
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<\/FONT><\/B> <\/SPAN>
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Canarium tramdenum <\/SPAN><\/I>Dai and Yakovl planting technique<\/SPAN><\/B> (Vietnamese version only)<\/SPAN><\/I><\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN>
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Endospermum chinense <\/SPAN><\/I>Benth planting technique <\/SPAN><\/B> (Vietnamese version only)<\/SPAN><\/I><\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN>
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Pinus kesiya<\/SPAN><\/I> Royle ex Gordon planting technique <\/SPAN><\/B> (Vietnamese version only)<\/SPAN><\/I><\/SPAN><\/FONT>
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<\/FONT><\/B> <\/SPAN>
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Simplifying the management of farm forests in northwest Ecuador <\/B> <\/SPAN>(Vietnamese version only)<\/SPAN><\/I><\/FONT><\/p>\n","protected":false},"excerpt":{"rendered":"

Results of research on the relationship between tree species in natural forest
\n(Hoang Van Thang)<\/p>\n

Research on the reciprocal relation between tree species in natural forests is a difficult and complicated job. To develop a precise scientific basis requires a reliance on biological characteristics and a detailed study of the phytotoxin of each tree species. This paper introduces a research method based on the frequency of occurrence of the species. Initially, groups of species were found that commonly occur with Endospermum chinense, Lithocarpus fissus, Erythrophiseum fordii and Canarium album. This is a preliminary result providing a basis for selection and combination of species in mixed plantation establishment. <\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/444"}],"collection":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/comments?post=444"}],"version-history":[{"count":0,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/posts\/444\/revisions"}],"wp:attachment":[{"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/media?parent=444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/categories?post=444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vafs.gov.vn\/en\/wp-json\/wp\/v2\/tags?post=444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}