1. STUDY ON CUTTING PROPAGATION OF DIPTEROCARPUS ALATUS
Nguyen Thi Hai Hong, Tran Nhat Nam, Vo Trung Kien
Forest Science Sub-Institute of South Vietnam
SUMMARY
Dipterocarpus alatus is an indigenous species for large timber with high economic value, dominated in the tropical rain forests. This species was defined a difficult-to-root species as cuttings were harvested from mature trees. Therefore, research on cutting propagation of Dipterocarpus alatus has been conducted. The experiments included root stimulants, ages of mother trees, the time to harvest cuttings. The results showed that the highest rooting percentage was reached in the treatment with 2,4-D 500ppm and IAA 100ppm (38,33 – 48,33%). Cuttings harvested from 1-year-old mother trees had the highest rooting percentage (82.5%) and these decreased significantly to cuttings taken from 2-year-old or older mother plants. The time that cuttings harvested was the best in April. The root quality had the same trend with rooting success.
Keywords: Cuttings, Dipterocarpus alatus.
2. STUDY RESULT OF AQUILARIA CRASSNA PIERRE ULTIPLICATION USING TISSUE CULTURE
Nguyen Thi Hien, Le Van Thanh
Forest Science Institute of Vietnam
SUMMARY
Result of the study on Aquilaria crassna Pierre cloning using grafting propagation technology has shown that applied technical options are very promising. In tissue culture it is observed that: a) optimum medium for fast coppiced multiplication in vitro is combined supplemental MTBS (0.2 mg/l of BAP + 0.25 mg/l of kinetin + 0.25 mg/l of adenin), achieved multiplier factor was 14.6 coppices; b) most suitable medium during root creation of seedlings in vitro consists of: 3/4 WPM + 0.1 mg/l of BAP added with 0.25 mg/l of IBA + 0.25 mg/l of NAA, with this combination, successful rate of root creation is 60.2%; c) in non-nursery garden condition, requirements for domesticating Aquilaria crassna Pierre in vitro are formulated as following: move the seedlings to non-laboratory condition in 5-7 days before transplanting into potting with soil and coconut fibre mixture in 3:1 ratio, it is necessary to train seedlings in raising tank filled with sand in about 2 weeks for the creation of new roots, survival rate in this stage is about 54.3%. Initially, the applying of grafting propagation technology with combination of experimentation has shown a higher rate of root creation of Aquilaria crassna Pierre in vitro than using tissue culture, rate of cutting with successful root creation and later becomes seedling is about 67.3%.
Keywords: Tissue culture, grafting propagation, Aquilaria crassana Pierre
3. BREEDING TECHNIQUES THYRSOSTACHYS SIAMENSIS (KURZ EX MUNRO) GAMBLE AND BAMBUSA SP. BY RHIZOMES AND BRANCH AIR-LAYERING
Nguyen Dang Khoi, Nguyen Quang Hung, Luu Quoc Thanh, Do Van Ban
Forest Science Institute of Vietnam
SUMARY
Tam vong and Tre dua to develop into the general material and material for handicraft items in particular require a new breed of technology to meet. Subject: Research and breeding techniques of intensive plantation of bamboo shoots and raw materials for the construction, processing for domestic consumption and export has explored and successfully propagating plants from Tam Vong and Tre dua mother tree selection process, select the root cuttings, select the extract branches, technical bunch election and temporary cuttings in the nursery,… Tam Vong and Tre dua breeding success has opened a new step in the problem satisfy the requirements of current production.
Keywords:, Thyrsostachys siamensis (Kurz ex Munro) Gamble, Bambusa sp., rhizomes, branch air-layering
4. STUDIES ON INVITRO MICROPROPAGATION OF AILANTHUS TRIPHYSA (DENNST) ALSON.
Nguyen Thanh Danh (1) và Vuong Dinh Tuan (2).
(1)Agri-Forest University, Thu Duc, Ho Chi Minh city.
(2) Forest Science Sub-Institute of South Vietnam
SUMMARY
Invitro micropropagation technique has been established for Ailanthus triphysa from segments of tree. Surface sterilisation is effectively obtained by treated segments in 700 alcohol for 30s prior treating with 0,1% HgCl2 for 3 min and 30 min in NaOCl (40%) solution. The treated segments were then rinsed 4 times with steriled distilled water .
The macro-elements in Murashige & Skoog medium reduced to a half strength supplemented with 2.0mg/l BA and 10% activated charcoal were considered as a relevant medium for invitro shoot induction. Highest ratio of shoot induced when ½ MS medium is supplemented with BA (3.0mg/l) and 10% of activated charcoal. Addition of 0.3 or 0.5 mg/l of IBA to 1/2 MS medium did not promote shoot induction but enhance elongation of the newly induced shoots.
Addition of 0.5 mg/l IBA to the cultured medium was recorded as suitable concentration in promoting 73.33% of root on the emerged shoots.
Keywords: Invitro micropropagation, Ailanthus triphysa (Dennst) Alson
5. Michelia flaviflora Y. W. Law & Y. F. Wu and Michelia champaca L. var. pubinervia (Blume) Miquel (Magnoliaceae) in Vietnam
Vu Quang Nam
Vietnam Forestry University
Xia Nian He
South China Botanical Garden, Chinese Academy of Sciences
SUMMARY
Michelia flaviflora Y. W. Law & Y. F. Wu, a well-known species in the southeastern China and Michelia champaca L. var. pubinervia (Blume) Miquel, a good variety distributed in India, Indonesia, Malaysia, Myanmar, Nepal, Thailand and China, have been reported to occur in Vietnam, but their distributions, colletion numbers, and preserving places are still being obscure as well as they are unknown species for Vietnamese botanists. By examination specimens of Poilane 3903 (P, VNM), Poilane 21121 (P), Schmid s.n. (P) and additional collections of Nam 181209.6 (IBSC, VFU), Nam 40109.20 (IBSC, VFU), Tran Van Tu HL 15 (VFU) from the botanical expedition in Sapa, Lao Cai Province and together with careful comparation with the typus specimens of Wang 100120 (IBSC) and authenticated specimen of Chen Bao Liang 87T-065 (SYS), they are confirmed as new records for flora of Vietnam. Michelia flaviflora has the most remarkable characters such as: leaf blade narrowly elliptic, papery, abaxially glaucous and white hairy, and petiole short, without a stipular scar; it was found in Hoang Lien Mts., where is nearly bordered on China. Michelia champaca var. pubinervia has its notable characters as leaf blade broadly elliptic, base cunneat to rounded, apical acumen often rather short and stipular scar 0.3-0.7 as long as petiole; it has its natural distribution in the Langbiang Plateau, Lam Dong Province. Thus, totally 22 species and 1 variety of the genus Michelia are heretofore recognized from Vietnam.
Keywords: New species, Michelia flaviflora, Michelia champaca var. pubinervia, Michelia, Vietnam.
6.
RESULTS OF DYNAMIC STRUCTURE SIMULATION AND APPLICATION PROPOSAL FOR MANAGEMENT OF DRY OPEN FORESTS WITH DIPTEROCARPS IN CENTRAL HIGHLANDS
Tran Duc Manh, Tran Van Con
Forest Science Institute of Vietnam
SUMMARY
Based on data collected in 6 permanent sample plots during 2006-2009, the dymnamic structure of dry open forests with dipterocarps in Central Highlands has been simulated. Simulation results are scientific background for application proposal in sustainable mangement. Researchs have been done to analyse the basic parameters of three dynamic processes: diameter increment, recruitment and mortality to develop estimated stand structure tables with period of 5 years and lasting to 30 years, starting from stand status of 2009. The estimated model shown the changes in distrubution structure of N-D, G-D and M-D of the dry open forests with dipterocarps within 30 years in the future. From the research results, proposal has been made for limit cutting diameter, annual allowance cutting and cutting cycle. The management system of dry open forests with dipterocarps is selective logging. For large size timber production, the limit diameter cutting is > 40cm; for saw log is 30-40 cm and for small timber is 25-30 cm. Stand to be haversted should have a volume stocking of more than 150 m3/ha, cutting intensity is of 33% with a cycle of ca. 13-15 years.
Keywords: Cutting cycle, dry open forests with dipterocarps, limit diameter cutting, simulation, stand structure dinamic
7. THE CHARACTERISTICS OF UNIT PLANTATION IN THANH HOA
Dang Thinh Trieu
Forest Science Institute of Vietnam
SUMMARY
After a long time of cultivation, plantations of Dendrocalamus in Thanh Hoa province were decreased both productivity and quality. Results of survey in Ngoc Lac, Lang Chanh and Ba Thuoc districts showed that the growth parameters and properties of soil of Dendrocalamus plantations were seriously degraded.
Keywords: Dendrocalamus barbatus, Thanh Hoa, degrade
8. CHECKING RESULT OF VOLUME AND SITE-INDEX TABLES FOR SPECIES PLANTED BY KFW1 AND KFW3 IN BAC GIANG, LANG SON AND QUANG NINH
Tran Van Con,
Forest Science Institute of Vietnam
Hoang Thi Thuong, Pham Thi Thanh Binh
Agriculture-Forestry College of Thai Nguyen
SUMMARY
To support management of plantations established in Bac Giang, Lang Son and Quang Ninh funded by KfW, the volume and site index tables of Pinus massoniana, Pinus merkusii, Acacia auriculiformis and Acacia mangium have been checked for their application in project areas. The results shown: (1) Volume tables of Pinus massoniana and Acacia auriculiformis have small absolute and relative error, being random and applicable for the project areas. (2) Volume table of Acacia mangium has systematical error, the volume of table is smaller than the real volume when tree size increased and not applicable for the project areas. (3) In case of Pinus merkusii, the data were not suitable for the checking. (4) The site index tables of the two species Acacia auriculiformis and Acacia mangium shown reletively good the direction of the hight growth curve, but usually had a class higher than the reality. It should be corrected before application for the project areas. (5) The site index table of Pinus massoniana proved not suitable with the controled data.
Keywords: Acacia auriculiformis, Acacia mangium, Pinus massoniana, Pinus merkusii, site index table, volume table.
9. ISOLATING AND SCREENING MICRO-ORGANISMS HIGHLY DISOLVEABLE XENLULO AND COMPATIBLE WITH ERODED SOILS, CHARACTERING THEIR PHYSIOLOGIES/BIOLOGY IN ORDER TO PRODUCING BIO-FERTILIZER FOR FOREST TREES.
Nguyen Thi Thuy Nga
Forest Science Institute of Vietnam
Forest fires which have been recently occurred seriously are one of main reasons causing remarkably soil erosion in the world. These result from the retain of firing materials on ground. Using xenlulo-disolving bacteria which are living on that soil is one of the excellant approaches to disintergrate the material to reduce the firing risks along with increasing the humic soil. Twenty five strains able to disolve xenlulo were isolated from 30 soil samples collected from barelands. Of which, there were 10, 3, and 2 strains the xenlulo-disolved rings reached around 15mm, 20mm, and 25mm, respectively. The best strain DT2 growth well on the PD medium and took about 6 days for full growth under liquid culture at 35-400C. The other best strain DV2 was relatively approriate with the Hutchinson’s Agar-free nutrient media at 300C. These might be potential strains to produce bio-fertilizer with the aims of disolving vegetation and slash on forest ground to reduce the risk of forest fire and increase the humic soil.
Keywords: Isolation, screening, micro-organisms disolveable xenlulo
10. PHYLOGENETIC RELATIONSHIP OF CRYPTOSPORIOPSIS EUCALYPTI CLONES CAUSING LEAF SPOT OF EUCALYPTUS
Tran Thanh Trang
Forest Science Institute of Vietnam
SUMMARY
The ITS regions of rDNA of fifteen Cryptosporiopsis eucalypti clones collected on Eucalyptus hosts from different provinces were varified. The variation in ITS regions between clones were minor, however those clones were divided into three groups according to geographic regions of collection. The homology similarity of clones collected in a region were very high, up to 100%. The genetic distances of clones in group I and group III was higher than that of group II and group III.
Key words: Cryptosporiopsis eucalypti, homology, ITS region
11. THE RESULTS OF RESEARCHING ON SELECTION OF LIGHT COVER MATERIALS AND METHOD OF DEFINING LIGHT COVERING FOR CUTTING HOUSE FOR FOREST TREES
Le Xuan Phuc
Research Center for Forest Industry
Forest Science Institute of Vietnam
SUMMARY
Cutting propagation is easy to apply with reasonable cost and without the requirement for high technology to meet demand on high quality and large amounts of seedlings for foest plantation. It is becoming the most popular and effective method to produce seedlings in many countries throughout the world for many years. Because of very severe climate in the North of Viet Nam ( from Hue to the Nortth) caused by the cold north wind and the hot–dry wind and lack of scientific database for design, light suitable for many tree species to root is not obtained in too hot and sunshine weather and the cold and foggy periods in existing cutting house. They are only effective in good weather condition (sunshiny but not too hot days). The result below help to select materials suitable for building sunshiny roof and wall of cutting house in Vietnam and how to control sunshine inside according to need of cutting
Key words: light cover materials, cutting environment, parameter of light covering, method of defining light covering
12. TESTING RESULT OF ANTIFUNGI ABILITY OF TREATED PLANTATION TIMBER PRODUCTS
Pham Thi Mien, Nguyen Quang Trung, Phan Luong Ngoc
SUMMARY
Many fast growing plantation timber species (including Acacia and Eucalypt) has low natural durability, they are susceptible to attack by harmful insects, fungi’s and rot quickly.
Improvement of the timber quality, of plantation species, can be obtained by using thermo-chemical-mechanical treatment technology to obtain improve its physical-mechanical properties.
This paper introduces the testing result of the anti-fungi ability of the treated E.urophylla wood. The urophylla sawn timber treated with Phenol-formaldehyde (P-F) and pressed at high temperature and pressure has the best fungal resistance. As E.urophylla will not allow the endosmosis of P-F into the timber structure, the treated wood layer should not be broken or cut during . The plywood products made of P-F and peeling veneer have greater fungal resistance than plywood made of P-F and 5mm thickness sawn board layers. The treated E.urophylla products could replace some native timber species obtained from natural forests to build the cabins and flooring of ships, particularly ocean-going fishing boats.
Keywords: Innovated wood, flooring, fungal and rot timber.
13. RESEARCH ON BENDING TECHNIQUE OF ACACIA HYBRID FOR MUNUFACTURE FUNITURE
Nguyen Duc Thanh, Nguyen Xuan Hien, Do Thi Hoai Thanh
Forest Products Processing Research Division
Forest Science Istitute of Vietnam
SUMMARY
Research on wood bending technology to manufacture bentwood for furniture is implemented. The result of researching determined possibility of bending wood Acacia hybrid h/R = 1/6 (h – thickness of wood detail; R – radius of bending). It is a foundament of choicing thick of wood and radius of bending. The project established technology of wood bending to manufacture bentwood for furniture with dimenstion: thick 25 mm and wide 30 mm. It was bent with radius 200 mm equivalent with rate of bending 1/8. Quality of bentwood is activited to requiring of tecnhology parameter.
Keywords: Bending wood, Acacia hybrid, Funiture
14. SHAKES AND CHECKS ON SAW LOGS AND SAWN WOODS OF EUCALYTUS CAMALDULENSIS DEHNH
Do Van Ban
Forest Science Institute of Vietnam
SUMMARY
Shakes and checks on saw logs and sawn woods of Eucalytus camaldulensis are the most reason decreasing the quality and usage value . On the logs are usually heart shakes, axial shakes and they may split the logs into 2-4 parts lenghtwise, especially for logs stored outside. Axial shakes usually begin with a kind of hear shakes on the end in base direction and develop top towards. Sawn boards and slates containning the pit can be shaked while sawing, and during strorage all of them can be shaked and shakes may split sawn products into halves lenghtwise. Shakes and checks are as results of a uniform shrinkage of different anatomical direction.
Key words:Eucalytus camaldulensis Dehnh,, round logs, sawn timber, shakes and ckecks.
15. E. UROPHYLLA WOOD TREATED WITH PHENOL-FORMALDEHYDE FOR THE FLOOR AND CABIN OF SHIP MAKING
Nguyen Trong Nhan , Nguyen Quang Trung, Hoang Van Phong
Forest Science Institute of Vietnam
SUMMARY
Eucalyptus urophylla is one of the fastest growing tree species and is being planted in many plantation zones in Vietnam. It is used as an industrial raw material and is grown in many regions of Vietnam. The utilization of E.urophylla timber is limited and the current utilization does not meet its full potential. E,urophylla logs are being used as a raw material for wood chip production and being sawn into timber for use as construction material. In order to improve the value of E.urophylla logs, it should be used to produce higher value added products. This study introduces a product manufactured for E.urophylla sawn timber and treated with phenol-formaldehyde resin which increases its density MOR and dimensional stability. It is proposed that these treated products be used for the flooring and cabins of ocean-going fishing boats. The E. urophylla timbers treated with Phenol-formaldehyde and dried at high temperature (1200C) have density of 0.74 g/cm3, MOR of 6.9 MPa and swelling of 7.1%. The products treated by phenol-formaldehyde and pressing at high temperature have the density of 0.79 g/cm3; MOR of 8.0 MPa and the swelling of 6.23%. Some physical and mechanical properties of the treated products are improved and better than the properties of the control samples. These products will be regularly monitored in both the floor and the cabin of the ship in which they have been installed.
Key words: E.urophylla timber; innovated eucalypt timber
16. RESEARCH RESULTS OF MOULDING FUNGI CONTROL ON CALAMUS AND MACCLUROCHLOA SERVING HANDICRAFT AND FINE- HANDICRAFT COMMODITY PRODUCTION
Nguyen Van Duc, Hoang Thi Tam
Forest Science Institute of Vietnam
SUMMARY
In handicraft and fine- handicraft commodity production using Calamus and Macclurochloa as raw material attention is always paid to the raw material and the finished products. Through empirical and testing methods, LN5 and the imported preparation Antiblue CC 55 are found to be effective for moulding fungi control at suitable concentration, contributing to raising the efficacy in using non-timber forest products inVietnam.
Keywords: Moulding fungi, Calamus, Macclurochloa, handicraft and fine- handicraft products
17. CRITERIA TO SELECT VILLAGES THAT HAVING POTENTIAL FORESTRY CTIVITIES WITH SUSTAINABLE FOREST MANAGEMENT IN THE NORTHWEST WATERSHED AREA, VIETNAMNghe
Đọc ngữ âm
Hoang Lien Son, Le Thi Tuyet Anh
Forest Science Institute of Vietnam
SUMMARY
Selection of typical local villages to promote the potential of forestry activities for rural development projects in mountainous is always a disturbed problem of managers and scientists. This article is to introduce a new approach in selection the villages for the implementation of the project “Sustainable forest management in Northwest watershed area, Viet nam” through a criteria system to obtain the objects and capitals of project. Since then, the appropriate forestry activities will be proposed to achieve the expected results.
Key words: Criteria, indicator, watershed area, rural livelihood, sustainable forest management
18. THE TEMPORARY TECHNICAL GUIDLINE FOR BAT DO BAMBOO SHOOTS STIMULATION GROWING OUT OF SEASON
Nguyen Quang Hung, Luu Quoc Thanh
Forest Science Institute of Vietnam
SUMMARY
To stimulate Bat do shoot growing out of season principally is not difficult, we only have to choose favourable area with suitable soil, water source and understanding techniques to care plantation. Bamboo shoot out of season bribgs high economical efficient. The project “Research and breeding techniques of intensive plantation of bamboo shoots and raw materials for the construction, processing for domestic consumption and export” has collected locale experience and caried out some examinations in serveral farmes in province Binh Duong to complet the temporary technical guidline for Bat do bamboo shoots stimulation growing out of season in some provinces Southvietnams
Keywords: Dendrocalamus latiflorus Munro, shoots growing stimulation out of season, fertilizing, root covering, watering.
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