Vietnam Journal of Forest Science Number 4-2007

1. A Newly Recorded Species of Schizostachyum Nees Genus (Poaceae) – Schizostachyum chinense Rendle for Vietnam’s Flora 

Nguyen Hoang Nghia, Tran Van Tien

Forest Science Institute of Vietnam 

Summary 

Schizostachyum chinense Rendle has natural distribution in high mountain forests of China and Vietnam. The species were found in evergreen broad-leaved forests in Hoang Lien National Park (Sa Pa district, Lao Cai province of Vietnam). The specimens were collected in Da xe Mount location of Sa Pa and deposited in the herbarium of the Forest Science Institute of Vietnam (FSIV). Based on morphological characteristics and flower structure, the species was described and compared with typical specimen of Schizostachyum chinense Rendle (Code: Guangzhou 595684) in Herbarium, South China Botanic Garden (Guangzhou, China). This is a newly recorded Schizostachyum species for the Flora of Vietnam. It has some special characteristics such as upper base of culm sheath swollen, lower base of culm sheath with rounded and curved margin, two short and big stigmas. The Vietnamese name of the species was called Sa Pa Schizostachyum to remember the location where the first specimen was collected for identification. 

Keywords: Sa Pa Schizostachyum, Schizostachyum chinense Rendle, new species,  

2. Social impact assessment in Dak To State Forest Enterprise – Kontum province

Vo Dai Hai

Forest Science Istitute of Viet Nam

Sustainable forest management and forest certification is a general trend of the society and is also our forest development strategy nowadays. Social impact assessment in Dak To State Forest Enterprise is carried out with an assistance of Vietnam – German Forestry Programme (GTZ) aiming at supporting Dak To Forest Enterprise to be linked with and gradually meet the requirement of sustainable forest management criteria of Vietnam FSC. The study has evaluated interaction between forest management activities of the enterprise and local social economic development; level of satisfactory of social indicators within National Criteria, especially criteria 2, 3 and 4.  

Keywords: Social impact,  Dak To State Forest Enterprise, sustainable forest management   

3. Studying on genetic diversity of some Camellia sp. cultivars of Vietnam by random amplified polymorphic DNA (RAPD) markers 

Nguyen Quang Khai

Silviculture Techniques Research Division

Forest Science Institute of Vietnam

Khuat Huu Trung

Agricultural Genetics Institute

summary

DNA from forty four Camellia sp. cultivars was examined using polymerase chain reaction (PCR) to determine the efficiency of random amplified polymorphic DNA (RAPD) markers in determining levels of genetic variability. Using 20 primers (series OPA, OPM, OPK, OLG, BIO and S) in PCR-RAPD reactions for 44 Camellia sp. cultivars The results shows that: there are 11 primers amplifying different classes of bands. A total of 2551 DNA bands were amplified by 528 PCR reactions. There are 155 amplified fragments, in which 151 polymorphic bands accounted for 97,4%. The sides of amplified fragments ranged from 200 to 5500 bp. The average was 231.9 bands per primer. There were 8 distinctive bands (including missing distinctive bands) which are fingerprinting marker to distinguish special one from all cultivars. Genetic similarity coefficients of 44 Camellia sp. cultivars in each pair ranging from 0.25 to 0.76. According to these results, 44 studying Camellia sp. cultivars were divided into10 subgroups belong to 3 groups based on their genetic similarity coefficients. 

Key words: Camellia, cultivar, RAPD, genetic diversity, distinctive band

4. Study on structure and composition of some majors forest types to establish of land use classification system for using  LANDSAT, SPOT5 sattelite image in Da river basin

Duong Tien Duc, Cao Chi Khiem

Silviculture Techniques Research Division

Forest Science Institue of Vietnam

Summary

Using high technology in interpretation of satellite images has become popular over the world. Recently, it has been interested in Vietnam but its reality application is still sparing with ranges and methods of realization. Especially important regions like Da river basin where the bigest hydroelectric power plant of Vietnam is based on, the regular classification in state of this basin becomes necessary for plantation and management. Morover, high accurate classification is required to apply in reality for desired effect.This research aimed at proposing the method for applying remote sensing technology in classification in satellite images of upstream watersed area of Da river. In the range of this paper, we have made a research for determination on structute and composition of this region to set basic for making a interpretation key of classification. As a first step, we have classified state of this region into 8 categories: (1) Natural evergreen broad-leaf forest; (2) Mixture bamboo forest; (3) limestone mountain forest; (4) Plantation forest; (5) Grass-land; (6) Mix agro-forest land; (7) Agricultural land; (8) Others .

Keywords: Sattelite image, composition, remote sensing, interpretation. 

6. Michelia mediocris’ seed physiological characteristics and storage method  

Nguyen Huy Son

 Non-timber Forest product research Center

Forest Science Institute of Vietnam 

Summary

Michelia mediocris

Dany is one of main plant species with highly economic value for forest planting in parts of Vietnam. Because Michelia mediocris Dany seed fails to get germinating very quickly, research on physiological charateristic and storage method of the seed with a view to extend germinating time is necessary. The result of the research has shown that weight of 1000 seeds is some 258,55g; 1 kilogram of the seed is between 3383 and 4514 seeds, 3868 seeds per kilogram of the seed on average. Suitable peservation humidity of the seed is from 27 to 33 percent; Suitable peservation temprature of the seed is from 5 to 15 degree Celcius. The lower the seed humidity is, the quicker failing to get the seed germination. With the humidity of less than 10 percent the seed fails to get germinating; with the humidity of between 10 to 15 percent the seed fails to get germinating after the first month and with the humidity of between 20 to 33,6 percent the seed gets germinating during from 3 to 6 months. 

Keywords: Seed storage,  Michelia mediocris Dany  

7. Insolating and screening endophytic bacteria to control of Cryptosporiopsis eucalypti Sankaran &B. Sutton pathogen causing leaf spot of Eucalypt 

Pham Quang Thu, Nguyen Thi Thuy Nga

Forest Plant Protection Research Division

Forest Science Institute of Vietnam 

Summary

Eucalypts were widely and purely planted with the huge area in many places in Vietnam. Due to the pure plantation of this species, when the epidemic of disease takes place it is affecting and spreading quickly on the big area and causing difficulty of disease control. Cryptosporiopsis eucalypti causing leaf spot, twig dryness and shoot die-back was one of the main agents. The endophytic bacteria are always living in the tissue of plants, and some of them are capable of anti-fungus. One hundred and thirteen colonies of endophytic bacteria were isolated from 15 twigs of eucalypt species which are healthy and vigorous, of which twenty colonies are totally different in characteristic. Five (B5, B8, P7, P17 and P14) of those twenty colonies were antifungal bacteria to Cryptosporiopsis eucalypti. This research result was primarily based-step to develop the method to control forest disease by bio-product. 

Key words: Eucalypt, Cryptosporiopsis eucalypti, antifungal bacteria, endophytic bacteria      

8. Results of test in effect of wood preservatives extracted from plant raw material against some wood damaging insect species 

Nguyen Thi Bich Ngoc, Truong Quang Chinh

Nguyen Duy Vuong, Nguyen Thi Hang, Le Bach Dang

Forest Products Preservation Research Division

Forest Science Institute of Vietnam

Summary 

Initial result of test in effect of wood preservatives extracted from Pterocarya stenopteras’leaf, Melia azedarachs’seed, Milletia ichthyochtonas’seed, Azadirachta Indicas’seed and Dioscorea cirrhosas’bulb with Coptotermes formosanus has shown that wood preservatives extracted from from Pterocarya stenopteras’leaf and Melia azedarachs’seed have low effect against Coptotermes formosanus; wood preservatives from Azadirachta Indicas’seed and Dioscorea cirrhosas’bulb have average effect as wood samples are soaked by dipping method and have high effect as wood samples are soaked by common dipping method with the solution concentration of over 4% and wood preservatives extracted from Milletia ichthyochtonas’seed have good effect as it was aparted from by etanol solvent.

Keywords: Coptotermes formosanus, plant raw material 

9. Results of test in effect of anti – mildewy presevative chemical use for fine arts and handicraft Products made from Calamus and Ampelocalamus 

Hoang Thi Tam

Forest Products Preservation Research Division

Forest Science Institute of Vietnam

Summary            I

n the area of fine arts and handicraft production, due attention should be paid to keeping raw material and product from mildewy damaging. Main content of presevative chemicals includes NaF + Na­2B4O7 and KAA – Antiblu CC 55 SC (Cholorothallonil 45% + Carbendazim 10%) which were tested in effect anti-mildewy for Calamus and Ampelocalamus raw material. The results defined solution concentration of presevative chemicals and suitable preservation requirements for fine arts and handicraft products made from Calamus and Ampelocalamus.  Keywords:  Anti-mildewy presevative chemicals for Calamus and Ampelocalamus, fine arts and handicraft   

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