1. A new bamboo genus, Kinabaluchloa K.M.Wong (subfamily Bambusoideae) and a new species, Kinabaluchloa wrayi K.M.Wong for Vietnam’s flora
Nguyen Hoang Nghia, Tran Van Tien
Tropical Forest centerForest Science Institute of Vietnam
Summary
A new bamboo genus namely Kinabaluchloa K.M.Wong has been found for Vietnam’s flora based on species specimens collected during field surveys taken in Bidoup National Park (Da Lat city, Lam Dong province). The genus was described first by K.M.Wong in Malaysia in 1993 and the new species found in Vietnam was named as Bidoup Kinabaluchloa bamboo (Kinabaluchloa wrayi K.M.Wong – Tre long Bidoup) to remember the location where the species was collected.
Keywords: the genus Kinabaluchloa, the species Kinabaluchloa wrayi,
2. Initial identification of common cause for dead pine trees (Pinus massoniana Lambert) in TamDaoNational Park
Pham Quang Thu, Dao Ngoc Quang, Le Van Binh, Nguyen Quang Dung
Forest Plant Protection research division
Forest Science Institute of Vietnam
Summary
Pine wilt symptoms and dead trees have been found in several locations belong to 95, 96, 98, 99, 100B forest sectors, in Tam Dao National Park in early 2006. A systematic survey was carried out to identify the cause for that phenomenon. Pinus massoniana trees, was killed by pine bark beetles (Dendroctonus sp., Ips calligraphus Germar, Ips sp. and Pissodes sp.). They are members of the family Scolytidae, Curculionidae in the order Coleoptera. Pine bark beetles feed on phloem tissue where they construct winding galleries. The galleries created by both the adult beetles and their offspring can effectively girdle a tree, causing its death. When beetle populations are low (endemic), attacks are generally restricted to senescent, stressed or damaged pines. During epidemics, pine bark beetles infestations often begin in weakened or injured trees, but the high beetle populations can invade and overcome healthy vigorous trees by attacking in large numbers over a short period of time. Widespread and severe tree mortality can occur during epidemics Moreover, when the beetles attack, they carry blue stain fungi (Ophiostoma sp.) into the tree, which occupies an important role in the life and death of their hosts. Blue stain fungus colonies grow into the outer sapwood of infested pines, stopping the upward flow of water to the tree crown. Sapwood occlusion by Ophiostoma sp. contributes to the quick death of pine beetles attacked trees.
Keyworks: Pinus massoniana Lambert, Ips calligraphus Germar Pissodes sp, Ophiostoma sp
3. Some growth characteristics of Pometia pinata porst in Cuc Phuong national park – Ninh Binh province
Nguyen Ba Van
Silviculture Research division Forest Science Institute of Vietnam
Summary
Pometia pinata Porst is a native forest tree species which grows well in Cuc Phuong National Park and in the Northern provinces of Vietnam. The wood has a soft pink color and is good for furniture making. This species can be used for plantations and enrichment in natural forest areas. Results have shown that this species grows well in pure plantations. Naturally regenerated trees grow well in natural forests. In natural forests, this species grows with other species such as Caryodapphnopsis tonkinensis, Chisocheton paniculatus, Saraca dives. This is could be useful information for establishing mixed species plantations
Keywords: growth characteristics, Pometia pinata Porst, Cuc Phuong national park
4. Results of research of traditional plants used by local people at the Cat Ba National Park
Cao Hai Xuan
Haiphong High-technology Agriculture-forestry Development Center
Nguyen Nghia Thin, Nguyen Thi Kim Thanh
Vietnam National University, Hanoi
Summary
Field surveys showed that 443 species, 335 genera, 118 families of 3 divisions of the higher plants at the Cat Ba National Park were used for medicine by the local people. Of those, the Angiosperms are dominant which represent 96.61% of total medicinal species, 96.72% of total genera and 92.37% of total families of the flora. Ten endangered species representing 2.3% of total medicinal species were listed. Nine families are the most diverse representing 7.6% of total families but the number of species goes up to 33.9% of total species of the flora. Of those, there are three famous families: Euphorbiaceae 27 species, Asteraceae 24 species and Fabaceae 24 species. The most diverse genera are Ficus 8 species, Phyllanthus, Desmodium, Polygonum, and Citrus with 5 species per each. Of medicinal plants collected, there are 150 herby species representing 34%; then 122 species of shrubby species (28%); 101 woody species (23%) and 70 lianoid species (16%) of total species. Fifty percent (50%) of to total medicinal species are found in the forests, 49% – on fields in the mountains, 28.4% on shrubby plots and 12% along the sea, streams or around lakes.
Keywords: Cat Ba National Park, traditional medicinal plant.
5. The Results of nutrient diagnosis of Parashorea chinensis Wang Hsie by morphology character
Doan Dinh Tam
Research center for forest ecology and environment
Forest Science Institute of Vietnam
Summary
Macro nutrient (N, P, K) has important effects to apparent, growth and development of Parashorea chinensis Wang Hsie in nursery. Deficient nitrogen reduces growth and development, hard young leaf and dry, leaf has yellow from tip into central and then fall down. Deficient phosphorus results in greenish leaf, hard and wrinkle, old leaf has dry and wrinkle symptom inside edge, leaf board has growing yellow dots. Deficient potassium makes leaf become yellow along edge and inward, tip of old leaves to be dry and brown colors.
Keywords: Parashorea chinensis Wang Hsie, nutrient requirements, morphology characte
6. Effect of different intensive cultivation techniques on plantations of Camellia sasanqua in Dai Lai, Vinh Phuc province
Hoang Van Thang, Nguyen Quang Khai
Silviculture Research division
Forest Science Institute of Vietnam
Summary
This report gives the results of tests of the Camellia sasanqua variety selected from Nghia Dan district, Nghe An Province and planted in Dai Lai, Vinh Phuc by different methods for intensive cultivation techniques such as ploughing, fertilizer application ( decomposed animal manure, NPK fertilizer) and planting density. The quantity of Camellia sasanqua fruit was relatively stable and had oil content higher than their mother trees in Nghia Dan after 7,5 years. The best growth for diameter and height was from a basal fertilizing rate of 3kg decomposed animal manure plus 0,2kg NPK per tree and a planting density of 625trees per ha ( 4x4m spacing). The highest productivity of Camellia sasanqua fruit was from a basal fertilizing rate of 0,4kg NPK per tree, and a planting density 1250 trees per ha. Keywords: Intensive cultivation techniques , Camellia sasanqua, Dai Lai
7. Vegetative propagation of Scaphilum Lychonophorum Species by cutting and air-layering
Tran Huu Bien
Southeastern Vietnam Forest Science and Production Center
Forest Science Institute of Vietnam
Summary
The Scaphilum lychnophorum (Hance) Kost among Sterculiaceae family is indigenous tree species; it is scattered in natural forest of some provices in Center, Highland, and Southeastern. The Scaphilum lychnophorum vegetative propagation experiment is estabished in Southeastern Vietnam Forest Science and Production Center, including: 4 IBA treatments (0, 100, 200, 300ppm) with 3 replications for layering and cutting. Results of layering and cutting propagation research show the highest taking root ratio with 300 ppm IBA (25,1% and 60,7%).
Keywords: Scaphilum lychnophorum (Hance) Kost, cutting propagation, air-layering.
8. Research on forest structure characteristic as a basis to propose some silvicultural technique methods to restore the forest in Copia reserve, Thuan Chau district, Son La province
Nguyen Tien Dung
Faculty of Forestry
North west University
Summary
Forest structure is organism components intestine Organisations rating in forest ecosystem. Forest structure include: time structure ecological structure, morphological structure. Very sophisticated structured secondary forest, depend on human being’s impact levels. In slice work rear reafforestation, to shorten reafforestation period of time and achieve desired efficiency, Forest structure research Concernment is precious necessary deed.
Keywords: Forest structure, reafforestation, Copia reserve
9. Appraisal of Pinus caribaea resin qualification in Dai Lai
Nguyen Van Duong, Phan Thi BinhNguyen Thi Hai
Non-TimberForest product research centerForest Science Institute of Vietnam Pinus caribaea is an of the potential exotic species for aforestation in Vietnam. Since 1963, p. caribaea has being planted in many localities. The research has been carried out for p. caribaea of 25 year old at Dai lai Forestry Production Center, Vinh Phuc province. The results of this research showed that total content of resinous matters contained in p. caribaea wood is high. Quality of p. caribaea resin is good, contents of colophan and terpentin oil reach 77,5% and 15,6%. According Vietnam standards TCVN 4188-86, p. caribaea resin is graded 1st class. Experiments carried out on colophan and terpentin oil from p. caribaea resin gave satisfactory results. These semi-products can be used for export.
Keywords: Pinus caribaea, p. caribaea resin, Dai Lai
10. Premary research results on improved cutting propagation house
Le Xuan Phuc
Forest Industry Technology transfer and Research centerForest Science Institute of Vietnam
Summary
Cutting propagation is one of good means and being used widely in Vietnam to meet demand on high quality and large amounts of seedlings for foest plantation in current period.Because of critical weather in some Northern provinces, existing cutting propagation houses only operate effectively in good weather conditions. The article talking about premary research results on improving some details of cutting propagation house in order to control cutting environment suitable with weather chractoristics of some Northern provices
Key words: cutting propagation house, cutting environment, media, mist system
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