STUDY OF THE GENETIC DIVERSITY OF DIPTEROCARPUS ALATUS ROXB. BY USING RAPD MARKERS
Nguyen Thi Hai Hong, Tran Nhat Nam, Nguyen Thi Le Ha
Forest Science Sub-Institute of South Vietnam
SUMMARY
Assessment of genetic diversity for 41 leaf samples Dipterocarpus alatus Roxb. that were collected from 10 provinces of 3 forest ecological regions in Vietnam by using RAPD markers with 18 random primers showed that these samples were highly genetic diversity. Genetic similarity coefficients varied from 43% to 100% and could be divided into 5 main groups: Group I that included the samples, D-CT-1-4 (Tan Phu, Dong Nai), D-DMC-1-5 (Duong Minh Chau, Tay Ninh), D-TP-5,6,11 (Dinh Quan, Dong Nai), showed differences in genetic coefficient being 18, 21, 47 and 57 %, respectively compared with the groups II, III, IV and V. Of which group II consisted ofd D-CP-1-5 (Chu Prong, Gia Lai), D-ES-2,3,5 (Easup, Dac Lac) and D-TP-1 (Dinh Quan, Dong Nai); Group III was D-BS-1-5 (Hoai Nhon, Binh Dinh), D-HTB-1-5 (Ham Thuan Bac, Binh Thuan); Group IV was D-DT-4 and D-DT-5 (Dac To, Kom Tum); and Group V was the remaining samples: D-HCM-2,4,5,6 (Ho Chi Minh) and D-TB-2,5,6,7 (Tan Bien, Tay Ninh).
Keywords: Dipterocarpus alatus Roxb., genetic diversity, RAPD
ANALYSING BIODIVERSITY INDICES OF WOODY PLANTS IN SON TRA NATURE RESERVE CONSERVATION – DANANG CITY
Pham Thi Kim Thoa
Faculty of Environment, Bach Khoa College, Da Nang University
SUMMARY
The quantitative analysis of biological diversity in order to determine the following indices: H – Shannon’s index, Importance Value Index – IVI, Cd- Simpson’s index, SI – Sorensen’s index. When the index is high, it means that the diversity is high corresponding to a high biological value. This method is very necessary to create solutions for conservation, policy and planning sustainable use of biodiversity resources.
The first application of this method is to assess biological diversity for woody vegetation in Son Tra Nature Researve, Da Nang city. Survey results in 12 plots are recorded 96 species of woody plants in different habitats: natural forest, natural forest only, forests, grasslands, forests and poor natural vacant land. IVI index shows an advantage in order flora studies in which Parashorea stellata Kurz is the most dominant (IVI = 35.38) and individual variation is quite evident in the research landscape. H index is high, ranging from 1.62 to 4.76 (natural forest, natural forest only from 3.61 to 4.76, from 1.86 to 2.60 forest, grassland, 1, 62, poor natural forest and bare land from 2.62 1.97 to 2.82. Cd index from 0.051 to 0.499 changes that the level of biological diversity of the communities have tended to decrease. SI index values of woody vegetation between the field studies ranged from 0.04 to 0.50 represents a very large difference in species composition studies in this field. As such multi-biodiversity Son Tra Nature Reserve is quite high and is influenced by environment and development activities in the future, so should have the appropriate conservation measures.
Keywords: Biodiversity, diversity index, forest tree, inventory data, sustainable development.
STUDY ON SOIL CHARACTERISTICS WHEREPHYLLOSTACHYS NIGRA MUNRO DISTRIBUTED IN SA PA, LAO CAI
Pham Thanh Trang, Nguyen Thi Thu, Bui Dinh Duc
SUMMARY
There was a similar in soil characteristics at Ban Khoang and Ta Van villages.The soil humidity was the same whilethe acidity was in a range of 5 to 5.5.. The contents of humus and assimilable protein in the soil of Ta Van (8.26% and 2.58, respectively) were higher than those of Ban Khoang (3.5% and 1.04). In addition, the survey data has shown that Tan Da soil might be favourable for Truc den distribution rather than Ban Khoang. In conclusion, soil factor influenced on the growth of Phyllostachys nigra in the study area.
Keywords: Phyllostachys nigra Munro, Soil
THE INVESTIGATION ON DISTRIBUTION OF MAHONIA NEPALENSIS DC. BERBERIDACEAE IN LANGBIAN MOUNTAINOUS AREA OF LAMDONG PROVINCE
Vu Kim Cong, Nguyen Thi Lang, Nong Van Duy
Tay Nguyen Institute of Biology
SUMMARY
We investigated distribution of the Mahonia nepalensis DC. on an area of 450 hectares belonging to the Langbian mountain of the Lacduong district, Lamdong province and some other neighboring areas. The result showed that this species distributed at altitudes between 1400m and 1900m; however,they grew wellat 1600 and 1800m asl. By setting up 60 plots and counting the number of trees with over 0.1 m in height, 504 trees were found. They distributed in coastal evergreen forests where the light intensity, temperature and humidity measured under Mahonia nepalensis DC. canopy were 620 -18499 lux, 22–300C and 60–85%, respectively. In addition, we also found the Mahonia nepalensis DC. distributed in the evergreen forests of the Long Lanh – Da Nhim area of Lac Duong district, Lam Dong province at the elevations of 1400–1600m.
Keywords: Mahonia nepalensis DC., Langbian mountain, Lam Dong
INFLUENCE OF DENSITY AND FERTILIZER ON PRODUCTIVITY OF 9.5 YEAR-OLD ACACIA HYBRID PLANTATION AT QUANGTRI
Nguyen Huy Son and Hoang Minh Tam
Vietnamese Academy of Forest Sciences
SUMMARY
Intensive forest plantation to improve productivity and quality of forests has been concerned . The Acacia hybrid clones BV10, BV16 and BV32 that were approved by MARD as technical germplasms were used to study on influences of density and fertilizer on the growth and productivity of 9.5 year-old plantation in Dong Ha – Quang Tri. The result showed that initial planting density, basal and top dressing fertilizing applications at the 2nd year period did not strongly affect survival percentage of 9.5 year-old Acacia hybrid plantation as the plantation was too mature for small timber business which was normally 7 years old. Competition for nutrient resources amongst individuals in the polulationresulted in strongly natural thinning and the survival rate reduced, ranging from 44 to60%, compared with the initial planting density and affected the growth and quality of plantation. The growth in D1.3 for the lowest density treatments (722 – 738 trees/ha) was the best with 17.22 – 17.49 cm in which proportion of trees having D1,3 over 18cm were 42.55 – 43.75%; however, timber productivity of standing tree was not high. In contrast, the highest density treatments (968 – 999 trees/ha) obtained the highest productivity of standing tree althoughthe D1.3 was the lowest and the proportion of trees with D1.3 ≥ 18cm was quite low with 15-26%. Therefore, the plantation needs to be thinned and the final density should be from 400-500 trees /ha for sawlog production.
Keywords: Acacia hybrid plantation, Fertilizer, Density, Productivity, Quang Tri province
COMPOSITION AND DISTRIBUTION OF MANGROVE AS A BASIS FOR SELECTING SPECIES TO PLANT ON THE COASTAL SUBMERGED REEFS AND ISLANDS OF THE SOUTH CENTRAL COASTALS
Hoang Van Thoi, Tran Duc Thanh, Kieu Manh Ha
Vietnamese Academy of Forest Sciences
SUMMARY
compositions and distribution of mangroves in the South Central Coasts were studied t along the sea coasts and islands from Binh Thuan to Binh Dinh provinces of Vietnam. The purposes of the studies are to identify composition and structures of mangroves on sandy, gravel and coral reef / particle conditions; from which decision on species selection could be judiciously made for cultivation. Results indicated that among 29 species of 19 plant families indentified in 11 different areas, 19 species of 10 families are true mangroves, while 10 species of 10 other families were identified as their associates. Species proposed area as the following order: Avicennia marina, Rhizophora stylosa, Rhizophora apiculata, Lumnitzera racemosa, Excoecaria agallocha, Rhizophora mucronata and Aegiceras floridum.
Key words: Mangrove forest, Coral reef and South Central Coasts
DEVELOPMENT OF SOFTWARE FOR GREEN HOUSE GASES INVETORY IN FORESTRY SECTOR
Vu Tan Phuong, Nguyen Viet Xuan
Research Centre for Forest Ecology and Environment
SUMMARY
Green House Gases Inventory Software (GGIS) for forestry sector was developed based on analysis of input data following Tier 1 and Tier 2 approach on national green house gases inventory guidelines provided by Inter-government Panel on Climate Change (IPCC) and research results of the ministerial level study on “Finalization of methods for green house gases inventory for forestry sector”. The software used C# and C++ base, which is a strong language and to be able to highly customize and run on multi bases. The main function of the software comprises the calculation of carbon stock change in different carbon pools and analysis of uncertainty of the inventory results in forestry as required by IPCC . In addition, the software also contains a comprehensive database on activity and emission data which were compiled from IPCC guidelines for Tier 1 and national studies for Tier 2 application. A number of IPCC guidelines on green house gases inventory was also included in the database as the reference for users. The software was used to test the green house gases inventory in land use, land use change and forestry for the year of 2005 and the results showed high confidence.
Keywords: Green house gases, Climate change
ESTABLISHING THE GUIDE FOR ENVIRONMENTAL IMPACT ASSESSMENT REPORT FOR FOREST PLANTATION PROJECTS
Ha Thi Mung
Vietnamese Academy of Forest Sciences’
SUMMARY
Basing on research results on standards, criteria and environmental impact assessment index for domestic forest plantations as well as results on implementing the environmental mission of Ministry for Agricultural and Rural Development on ‘Establishing the guide for environmental impact assessment report for forest plantation projects’ done by Research Centre for Ecological and Environment, Forest Science Institute of Vietnam in 2010, we proposed the guide for establishing environmental impact assessment report (DTM) for forest plantation projects with the scale of more than 1,000 ha. The guide includes: (1) Methods for environmental impact assessment, (2) Content and structure of DTM report, (3) Guide for establishing some key contents of DTM report for forest plantation projects (summarized description of project, socio-economic conditions of project area, environmental impact assessment, preservative and mitigating measures of bad effects as well as preservative and adaptive measures of environmental problems, environmental management and observation program, community consultation). Investors of forest plantation projects are recommended to refer this guide and apply suitably in particular conditions to establish DTM report.
Key words: Forest plantation projects, Environmental impact assessment
BIOLOGICAL CHARACTERISTICS OF LEAF EATING (ERICEIA SP.) ASSOCIATED WITH ACACIA MANGIUM AND ACACIA AURICULIFORMIS IN VINH LINH, QUANG TRI
Le Van Binh, Pham Quang Thu, Dao Ngoc Quang
Vietnamese Academy of Forest Sciences
SUMMARY
Leaf eating insect of four years old Acacia mangium Wild and Acacia auriculiformis A.Cunn plantation in Vinh Tu commune, Vinh Linh district, Quang Tri province was identified as Ericeia sp. (Noctuidae family, Lepidoptera order). Its life cycle has four phases: adults, eggs, larvae and pupae. Adult female is usually larger than the male, the male with length of 20mm to 23mm (body light grey in colour) and the female 22mm to 24mm (body dark grey in colour). The antenna is string-shaped. All four eyes (including 2 compound and 2 simple eyes) are light grey in colour. Larvae have six instars: first instar is green; second instar is brownish green; third instar is light brown with the head and back of abdomen are bluish in colour, fourth larval instar is light brown and back of abdomen are bluish in colour, fifth and last larval instar are brown in color with black along the under of abdomen. Using chemical insecticides in laboratory showed that Trebon 10EC (0.1%) and Sherpa 25EC (0.25%) were the best insecticide with 100% of larval mortality after 8 hours appplying.
Keywords: Leaf eating, Acacia mangium, Acacia auriculiformis.
THE EFFECT OF FIRE RETARDANT (MONO AMONIUM PHOSPHATE – MAP) TO SOME PHYSICAL PROPERTIES OF EUCALYPTUS UROPHYLLA WOOD
Do Vu Thang, Nguyen Xuan Hien
SUMMARY
This research focuses on the effect of fire retardant (MAP – Mono Amonium Phosphate) to some mechanic properties of Eucalyptus urophylla wood (MOR, sn). The wood was treated with 10%, 15%, 20% MAP solution under 0.7 Mpa pressure and kept in 30, 60, 90 minutes. The result shows that, mechanic properties of wood are extremely reduced when treated with high concentration solution and in a long time. In the scope of the research, MOR is reduced up to 21% and sn is reduced 12% (in average).
Keywords: Mono Amonium Phosphate, Physical Properties, Eucalyptus urophylla
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