POTENTIAL OF MELALEUCA CAJUPUTIAS A RAW MATERIAL FOR MDF PRODUCTION
Bui Duy Ngoc
Forest Products Processing Research Division
Forest Science Institute of Vietnam
SUMMARY
Substantial plantations of Melaleuca cajuputi
have been established in the Cuu Long
delta, Vietnam. However, to date,
these plantations have not been utilized to their potential
capacity. One potential use of Melaleuca cajuputi
is as a raw material for MDF
(medium density fibre board) production.
An analysis of the wood properties of M. cajuputi showed that the species was suitable for MDF production It has a cellulose content that exceeds 30%
and the wood fibres are long and smooth; features similar to some species of Eucalyptus and
Acacia. In addition, fibre softening temperature (from 1400C
to 2000C) and softening time
(from 4 to
90 minutes) enable easy separation of
fibres.
Keywords: Melaleuca cajuputi,
fibre board.
RESEARCH ON FIRE PROTECTING OF ECALYPTUS
CAMALDULENSIS DEHNH BY SODIUM
SILICATE (NA2SIO3)
Nguyen Duc Thanh, Vu Dinh Thinh, Nguyen Xuan Hien
Forest Products Processing Research Division
Forest Science Institute of Vietnam
Eucalyptus camaldulensis Dehnh. is a
plantation tree species grown in Vietnam and its timber is commonly
used in construction, transportation, mining and furniture. However processed timber E. camaldulensis is potentially flammable at low humidity.
Treatment of E. camaldulensis timber with
solutions of 10%, 15%, 20%, 25% Na2SiO3 offers a degree
of fire resistant .
Keywords: Fire protection, Eucalyptus camaldulensis Dehnh, SodiumSilicate.
SOME RESEARCH RESULTS ON BUILDING HAMLET
SCALE FOREST
CUTTING NURSERY IN CENTRAL HIGHLANDS
To Quoc Huy
Forest Science Institute of Vietnam
SUMMARY
Propagation of forest tree species using clonal
methods or cuttings is a common and an economic method for producing new
planting material. In Vietnam, industrial scale cutting
nurseries are not appropriate because of high production and distribution costs.
Ideally in rural areas, nursery production should be
simple requiring minimal investment and easily implemented at a community
level. A suitable system has been
developed using a simple structure covering 224 square metres suitable for a
range of the geographic
conditions and applicable at the remote village scale.
Suitable methods and procedures have been developed
using Acacia and Eucalyptus hybrids which prescribe grafting and cutting
techniques together with irrigation and shading regimes to successful raise
planting material.
The system will be introduced into rural communities
in the Central Highlands.
Keywords: Cutting nursery, Central Highlands, Shade light,
Overhead irrigation
SOME ECOLOGICAL CHARACTERISTICS AND GROWTH OF Brownlowia tabularis Pierre,
Toona surenii (Blume) Merr AND Dipterocarpus
condorensis Ashton PLANTATIONS
Tran Huu Bien, Phan Van
Huong
Vietnam Southeastern Forest
Research and Production
Center
SUMMARY
Brownlowia tabularis Pierre,
Toona surenii (Blume) Merr, Dipterocarpus condorensis Ashton are
economical indigenous trees species of Vietnam suitable for furniture
production.
The growth
and other characteristics of the three species were compared under natural
forest and plantation conditions in a number of sites
While B. tabularis, T. surenii and D. condorensis
demonstrated suitable growth and form in the natural forest, the results under
plantation conditions were often poor growth and form and high mortality
rates. Major problems identified were
damage caused by bud damaging insects in T.
surenii and poor form in D.
condorensis, B. tabularis where multiple stems and multiple branching were common faults.
Keywords: Ecological characteristics, Brownlowia tabularis, Toona surenii, Dipterocarpus condorensis.
GROWTH AND ECONOMIC EFFECTS OF ACACIA HYBRID IN QUANG TRI PROVINCE
Tran Duy Ruong
Forest Science Institute of Vietnam
SUMMARY
One of the successful plantation tree species planted the Cam Hieu
commune, Cam Lo district, Quang Tri
Province, Vietnam
is referred to as Acacia hybrid.
Measurements at age seven years showed that the average volume production in plantations was 134.7 m3/ha
(range 80.7-161.1) or an average mean annual increment of 19.2 m3/ha. These results represent potential revenue of
37.292.250 to 91.942.650 VND/ha.
Economic analysis suggested a Net Present Value (NPV) of 12.729.830 to
38.789.650 VND/ha.
Plantations of Acacia hybrid potentially
provide an economic benefit to local people, creating employment and reducing
poverty while contributing to reafforestation and environmental protection.
Keywords: Acacia hybrid,
Economic effects, Quang Tri
DETERMINATION OF THE COMMERCIAL
VALUE FOR SEVERAL COMMERCIAL TREE SPECIES IN THE EVERGREEN FOREST
IN KON HA NUNG – GIA LAI
Tran Hong Son
Tropical Forest Research Centre
SUMMARY
Traditionally
forestry volume estimates and volume tables for standing native forests have
been developed based on quantity only, not necessarily considering wood quality
and commercial value contained in mixed species and mixed age forests.
Volume
equations have now been determined for four primary harvested species of the evergreen
forest in Kon Ha Nung – Gia Lai: Dialium
cochinchinensis, Syzygium wightianum,Canarium album and Artocarpus borneensis .
The models contain a number of equations and
relationships to determine total tree volume, merchantable volume and wood
quality and ultimately to generate an economic value for each tree and stand
being assessed.
Keywords: Commercial timber table,
primary harvesting
EFFECTS OF SPECIES AND PROVENANCE ON ESSENTIAL OIL PRODUCTION OF MELALEUCA
IN BA VI (HA NOI), VIETNAM
Khuat Thi Hai Ninh, Nguyen Thi Thanh Huong
SUMMARY
The essential oil
content and composition of twelve (12) provenances of Melaleuca were analyzed to aid in selecting suitable species/provenances
for plantation development in Vietnam. Ten provenances of Melaleuca quinquenervia originating from Australia (Q8, Q15-Q23) and
two provenances of Melaleuca cajuputi
subsp.
cajuputi (Cpt, Cth)
from Thanh Hoa (Long An) and Phu Loc (Thừa Thiên Huế) in Bavi.
Analysis of total
essential oil content and proportion represented by 1.8-cineole in foliage of
two year old plants varied between 0.7 and 9.6% and 0.8 and 71%
respectively. The proportion of
1.8-cineole content of the essential oil in three of the Australian provenances
was at least 64%, whereas the 1.8-cineole
content of the two Vietnam
provenances was relatively low, 0.8-14.3% of total oil.
Production of cuttings
of Melaleuca quinquenervia (Q8)
requires the application of 1.5% IBA powder to cuttings at time of setting,
preferably in May.
Keywords: Melaleuca quinquenervia , Provenance, Propagation, Essential oil
PROVENANCE
SELECTION FOR SCHIMA WALLICHII CHOISY IN
ECO-REGIONS IN VIETNAM
Doan Dinh Tam
Forest Science
Institute of Vietnam
SUMMARY
A trial has been established at Dien Bien, Vietnam,
to compare the performance of six different provenances of Schima wallichii from each of four Provinces/eco-regions (Son La,
Bac Giang, Quang Tri and Gia Lai) in Vietnam. Each provenance was represented by 49
individuals, each planted with 0.2 kg of NPK fertilizer (12:5:10), with a
follow-up application of 0.1 kg. The
study was replicated four times and during the second year of growth shade was
maintained at 30-40% full sunlight.
Initial results indicate that the northern
provenances from Son La tended to perform better across the trial with survival
of at least 53% and heights exceeding 110 cm.
Keywords: Experiment, provenance,
Schima wallichii
GENDER INVOLVEMENT IN COMMUNITY
FOREST MANAGEMENT AND RESTORATION IN THUONG QUANG COMMUNE, NAM DONG DISTRICT,
THUA THIEN HUE PROVINCE
Le Thi Dien, Vo Dinh Tuyen
SUMMARY
The Thuong Quang commune has a large natural forest area of
10,106 ha, of which 913.3 ha has been allocated to community groups to manage
and protect.
The role of gender in forest management and restoration is
of socio‑economic interest in community forestry management in Vietnam.
Studies in two villages (Katu and Kinh) are of
interest. In both villages the management
boards are all male and nominally they have all the decision making
responsibilities, although Katu men have more power in making decision than
Kinh men; inferring female involvement or consultation.
In both communities, female members participate in forest
patrols and normally the women are involved in the daily use of forest products
while the men are involved in the trade of those forest products which can be
traded.
With respect to non-timber forest products, the Katu women
harvest and use the non-timber forest products.
Forest maintenance including climbing plants and cutting shrubs
and collection of seeds and seedlings are mainly carried out by men while women
are involved in seedling propagating and the planting of rattan and
bamboo.
Keywords: Community forest management,
Gender, Forest resources
PROPAGATION OF MAHONIA NEPALENSIS
DC. BY ROOTED CUTTINGS
Nguyen Thanh Nguyen, Nguyen Cao Xuan Vien
Lam Dong Silviculture Experimentation Research Centre
Forest Science Institute of Vietnam
SUMMARY
To determine
the appropriate propagation methodology for Mahonia
nepalensis, a range of rooting hormones (IAA, IBA and NAA) at various
concentrations (0.5%, 1%, 1.5%, 2% and 2.5%) were tested for cuttings set in
the dry or rainy seasons at Dalat,
Vietnam.
Cuttings were
auxiliary shoots taken from 2-3 years old hedge orchards. Results were assessed on rooting percentage,
duration of rooting and root system quality and compared between the seasons.
For striking M. nepalensis cuttings, NAA was found to
be the most suitable growth regulator for rooting and root system quality.
Cuttings set
in the rainy season responded best with NAA applied at 0.5%, with rooting
percentages to 60% and rooting generation up to is 60 days. In the dry season, NAA needed to be applied
at 1.5% for rooting percentage of 45% and root generation up to 90 days.
Keywords: Cutting propagation, Mahonia
nepalensis, Rooting percentage
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