Vinh Phuc Province Research Articles

Porandra microphylla Y. Wan (Commelinaceae): A new distributional record for Vietnam

Porandra microphylla Y. Wan, is a newly recorded species for the flora of Vietnam. This species was collected from Lai Chau and Vinh Phuc province of the country. Morphologically, P. microphylla is closely related to Porandra scandens D.Y. Hong, but differs by its smaller and abaxially glabrous leaves and oblong or subglobose anthers.

A Multi-Criteria Approach to Dry Port Location in Developing Economies with Application to Vietnam

ABSTRACT This paper presents a conceptual framework for the inclusion of multiple criteria in the evaluation of dry port location in developing countries from a multiple stakeholder perspective. We present the framework in four steps. The first step encompasses preliminary research to filter the alternative locations for dry port development. In the second step, the stakeholders are clustered in three groups: dry port users, dry port service providers and the wider community. Then, we present the sub-criteria related to dry port location including the associated measuring methods. The third step includes an explanation on the methods used for weighing these criteria and sub-criteria. A multi-criteria analysis is carried out in the final step. We apply the methodological framework to Vietnam. The location of a new dry port project in Vinh Phuc province will be evaluated against two existing inland clearance depots (ICD) in Lao Cai and Phu Tho province.

Two new species of Aspidistra (Asparagaceae, Nolinoideae) from northern Vietnam: A. clausa and A. triradiata

Aspidistra clausa and Aspidistra triradiata are described and illustrated as new species from northern Vietnam (Vinh Phuc province, Tam Dao National Park). Aspidistra clausa is similar to A. crassifila, but has narrower leaves (lamina 2.8–4.5 cm vs. 6–12 cm), perigone tube wide tubular vs. campanulate, appendages longer, stigma conical vs. mushroom-shaped. Aspidistra triradiata is similar to A. hainanensis, but flowers larger (1.8–2.4 cm long, Ø 1.8–2.8 cm vs. 1–1.2 cm long, Ø 1.3–1.5 cm), perigone urceolate, lobes with 4 verrucose keels, stigma with three purple radial lines.

Draft Genome Sequence of Ochrobactrum anthropi Strain ML7 Isolated from Soil Samples in Vinhphuc Province, Vietnam.

Ochrobactrum species are widespread in the environment and can colonize a wide variety of habitats. Here, we describe the sequencing of a new environmental isolate of Ochrobactrum anthropi isolated from northern Vietnam.

Constituents of essential oil from the zhizomes of Siliquamomum tonkinense Baill. collected in Tam Dao national park , Vinh Phuc province

Constituents of essential oil from the zhizomes of Siliquamomum tonkinense Baill. collected in Tam Dao national park , Vinh Phuc province

Butterfly diversity and habitat variation in a disturbed forest in northern Vietnam

Abstract. Forests provide critical habitat for tropical butterflies world-wide. However, habitat variation and disturbance within forests can affect butterfly communities and diversity in complex ways. Building on previous research and a known land-use history, we studied butterfly diversity in the mountains of Tam Dao, Vinh Phuc Province, northern Vietnam monthly from 2005 to 2008 and 2012 to examine how habitat variation affects the butterfly communities. We sampled butterflies in three different types of forest habitat: an open road in a disturbed forest (which was formerly a path in a closed-canopy forest), bamboo-dominated forest, and secondary forest. A total of 147 species and 4,685 individual butterflies were recorded. The species composition and richness of the open road within forest and the secondary forest were similar to one another but more forest-associated species were found in the secondary forest. The bamboo forest had the fewest species and had a clearly distinct butterfly community con...

The changes in physical and chemical properties of soil during progressive succession of vegetation at Me Linh station for biodiversity, Vinh Phuc province

The changes in physical and chemical properties of soil during progressive succession of vegetation at Me Linh station for biodiversity, Vinh Phuc province

Effects of the water holding bio-product lipomycin m on mesofauna groups at the melinh station for biodiversity, Vinh Phuc province

Effects of the water holding bio-product lipomycin m on mesofauna groups at the melinh station for biodiversity, Vinh Phuc province

Effects of some physic - chemical characteristics of the soil on earthworms at the Tam Dao national park, Vinh Phuc province

Effects of some physic - chemical characteristics of the soil on earthworms at the Tam Dao national park, Vinh Phuc province

Litterfall production of the natural - recovered secondary forest at the Melinh station for biodiversity, Vinhphuc province

Litterfall production of the natural - recovered secondary forest at the Melinh station for biodiversity, Vinhphuc province

Results of the survey of the mammal fauna in the Tamdao national park, Vinhphuc province

Results of the survey of the mammal fauna in the Tamdao national park, Vinhphuc province

Influence of the KCl spraying addition on the leaves at different stages on some physiological and chemical indexes of the KT3 potato cultivar

The KT3 potato cultivar was a hybrid (Serrana x I.1035) from the International Potato Center (CIP) and had some agricutural characteristics: stem tall to medium; stems semi- erect, large to medium; dark green to green leaves; yield hight to good; resistant to virus and to leaf bright. The KT3 potato cultivar was cultivated at the Vinhphuc province from October 20 of 2003 to January 20 of 2004. We have sprayed KCl 0.2% additionally on the leaves at different growth stages (15 days, 30 days, 15 & 30 days after cultivation). Then, we studied the influences of this fertilizer on some physiological and biochemical indexes after 40; 50; and 60 treatment days . The study has proved that the KCl spraying addition after 30 days has had the highest fluorescence and increased the dry matter from 107.8% to 112.5% compared to those without KCl 0.2% sprayed on leaves. The treatment with KCl 0.2% at different growth stages has inceased the number of tubers/clump, the weight of tubers/clump and the tuber yield from 103.76% to 107.18%. Especially, the highest yield was recorded with the spraying after 30 days (107.18%). It did not change the total contents of maltose, proteins, ascorbic acid but increased the total contents of starch from 105.21% to 109.95% compared to those without KCl 0.2% sprayed on leaves.

Biomass and carbon stocks of the natural forests at Me Linh biodiversity station, Vinh Phuc province, Vietnam

Biomass and carbon stock of the natural forests in Vietnam are still not clear due to limitation of knowledge and financial. In this paper, the results of estimating biomass and carbon stocks of the natural forests at Me Linh Biodiversity Station are shown. There are two forest types in this study: the forest vegetation restored after shifting cultivation (vegetation type I) and the forest vegetation restored after clear cutting exploitation (vegetation type II). As the results, the estimated biomass of the forest vegetation restored after shifting cultivation is 86.80 ton.ha-1 and the estimated biomass of the forest vegetation restored after clear cutting exploitation is higher, about 131.59 ton.ha-1. The carbon stock in plants was about 43.40 ton.ha-1 of vegetation type I and 65.79 ton.ha-1 of vegetation type II. The carbon storage in soil of vegetation type I is 79.01 ton.ha-1 and vegetation type II is 99.65 ton.ha-1. Hence, the total of carbon stock in forest vegetation I and II are accounted by 122.41ton.ha-1 and 165.44 ton.ha-1, respectively. In general, it can be pointed out that the naturally recovering secondary forest at Me Linh Station is the secondary young forest with the low economic value due to shortly restored process (about 10-20 years), the flora is not rich and abundant, and there are only commonly pioneer and light demanding tree species.
 Sinh khối và trữ lượng các bon của rừng tự nhiên ở Việt Nam vẫn ít được quan tâm của do hạn chế về kiến thức và tài chính. Trong bài báo này, chúng tôi đưa ra kết quả của việc ước lượng sinh khối và tổng hợp các bon của các thảm thực vật rừng thứ sinh phục hồi tự nhiên tại Trạm Đa dạng Sinh học Mê Linh, tỉnh Vĩnh Phúc - Việt Nam, nơi có loại hình thảm thực vật chính, đó là thảm thực vật phục hồi sau nương rẫy (kiểu thảm thục vật I) và thảm thực vật phục hồi sau khai thác kiệt (kiểu thảm thực vật II) nhằm mục đích đánh giá tiềm năng của rừng thứ sinh tại khu vực nghiên cứu. Sinh khối của thảm thực vật phục hồi sau nương rẫy là 86,80 tấn/ha. Sinh khối của thảm thực vật phục hồi sau khai thác cao hơn, đạt 131.59 tấn/ha. Lượng các bon hấp thu trong đất của thảm thực vật I là 79,01 tấn/ha và thảm thực vật II là 99,65 tấn/ha. Như vậy, tổng lượng các bon được hấp thu trong mỗi loại hình thảm thực vật trên là: 122,41 tấn/ha (thảm thực vật I) và 165,14 tấn/ha. Nhìn chung, rừng thứ sinh phục hồi tự nhiên tại Trạm Đa dạng Mê Linh chủ yếu là rừng non thứ sinh, ít có giá trị kinh tế do quá trình phục hồi diễn ra ngắn (khoảng 10-20 năm) nên thành phần thực vật nghèo nàn, không phong phú, thành phần chính chủ yếu là các cây gỗ tiên phong, ưa sáng.

New species and records of black flies (Diptera: Simuliidae) from Vinh Phuc Province, Vietnam.

Four new species of black flies are described, and three others are reported as newly recorded, based on adults reared from pupae, pupae and larvae collected in and near Tam Dao National Park, Vinh Phuc Province, Vietnam. New species include Simulium (Gomphostilbia) hongthaii sp. nov., S. (G.) tamdaoense sp. nov. (both species placed in the asakoae species-group), S. (Simulium) taythienense sp. nov. and S. (S.) xuandai sp. nov. (the two latter species placed in the striatum species-group). Newly recorded species are S. (G.) brinchangense Takaoka, Sofian-Azirun & Hashim, S. (Nevermannia) aureohirtum Brunetti and S. (S.) brevipar Takaoka & Davies. These discoveries increase the number of species of black flies known in Vietnam from 21 to 28.

A new occurrence species Salvia japonica Thunberg (Lamiaceae) of the flora of Vietnam

Recently, the genus Salvia L. comprises about 900 (-1100) species mainly distributed in the tropics, there were 8 Salvia species recorded in Vietnam. In this paper, we reported Salvia japonica Thunberg newly recorded for the flora of Vietnam. The Salvia japonica is anmual plant, that has stems erect, 40-60 cm tall, sparsely villous or subglabrous. Leaves 1-2-pinnate; petiole 7-9 cm long; leaf blade 6-13 × 5-11 cm; upper stem leaves 1-pinnate, under stem leaves 2-pinnate, short petiolate; terminal leaflet lanceolate or rhombic, pilose or glabrous, base cuneate, margin obtusely serrate; lateral leaflets ovate-lanceolate, 1.5-5 × 1-2.5 cm, base obliquely rounded, apẽ acute. Verticillasters 2-6-flowered, in terminal panicles; rachis densely glandular pilose and pilose; bracts and bracteoles lanceolate, glabrous, margin entire. Calyx tubular, 5-8 mm, sparsely glandular pilose and pilose, white hirsute annulate on throat inside, 2-lipped; upper lip nearly tooth, under lip ưith 2 acute lobes. Corolla bluish or white, ca. 1.0-1.5 cm, densely villous and glandular pilose; tube pilose annulate inside; upper lip 2 lobes or crenulate, lower lip 3 lobes with large mid-lobe. Stamens 2, filaments ca. 6-8 mm long with appen and tomentosa at the base; ovary glabrous, style as long as stamens or more, 2 lobes at apex. Nutlets brown, ellipsoid, ca. 1.5-1.7 × 0.5-0.6 mm. Is close to S. miltiorrhiza but differs from the others by stem without glandular; apex of leaf acute; bractea glabrous; sepal with tomentosa line in inner, fruit with 1.5-1.7 mm long. Voucher specimens were collected in Vinhphuc province (Tam Dao national park), deposited in the Herbarium of the Institute of Ecology and biological Resources, Hanoi, Vietnam (HN) and herbarium of Vietnam Museum National (VNMN).

Discovery of a new species of the genus Planaeschna from Northern Vietnam, with a first description of male P. tomokunii.

A new species of Planaeschna McLachlan, P. guentherpetersi sp. nov. (holotype male and paratype female) from Phu Tho province, northern Vietnam, is described and illustrated. In addition, the male of P. tomokunii Asahina, 1996, which was known from only the holotype female, is described for the first time, based on newly collected material of both sexes, from the type locality, Tam Dao, Vinh Phuc province, northern Vietnam.

First record of the genus Dolichomitus Smith (Hymenoptera: Ichneumonidae: Pimplinae) from Vietnam, with description of one new species

The genus Dolichomitus Smith, 1877 is recorded from Vietnam for the first time with description of a new species, D. lami sp. nov., from Hoang Lien National Park, Lao Cai Province. Besides, D. melanomerus (Vollenhoven) is recorded as new for the country from specimens collected in Tam Dao National Park, Vinh Phuc Province and Hang Kia-Pa Co Nature Reserve, Hoa Binh Province.

Landsnails (Gastropoda) in Tam Dao national park, Vinh Phuc province, Vietnam

The survey and sampling land snails in Tam Dao National Park were conducted from 2003 to 2011. We have identified 52 species and subspecies of terrestrial gastropods in Tam Dao, belonging to 31 genera, 13 families and 2 orders (Architaenioglossa, Stylommatophora), 2 subclass (Prosobranchia, Pulmonata). Of all families recorded: Cyclophoridae, Pupinidae, Subulinidae, Camaenidae, Bradybaenidae, Ariophantidae, Helicarionidae, Plectopylididae, Clausiliidae, Achatinellidae, Streptaxidae, Streptaxidae and Achatinidae, the family Cyclophoridae is the most abundant in number of species (up 19.23% of the total species), the Clausiliidae occupied the second place with 13.4% of the total species, and all the rest of families are less. The species of large size, widely distributed in many parts of northern Vietnam are Camaena vaysieri, Cyclophorus songmaensis, Cyclophorus siamensis and Cyclophorus exaltus, the tiny-sized species are Videna timorensis, Pupina anceyi and Pupina brachysoma. In habitat, the most abundant species are observed in natural forest, then in edge of forest, and least of all in cultivated land and wasteland. In surveying lines, the residential district of Tam Dao has the most abundant species. The dominant species in natural forest habitats belong to the families Ariophantidae and Helicarionidae, the common species widely distributed belong to the family Bradybaenidae, such as Bradybaena jourdyi, Bradybaena similaris. The dominant species in cultivated land belong to the families Clausiliidae and Subulinidae, a Achatina fulica is considered as an exotic species.

Study on decomposition of litter under canoppy of natural - restored secodary foest at Me Linh station for biodiverity

Me Linh station for biodiversity is a unit of Institute of Ecology and Biological Resources, Vietnam Academy of Scientific and Technology. It locates at Ngoc Thanh community Phuc Yen town and Vinh Phuc province. It has total of area 170.3 ha, in which consist of secondary forest and shrubs and grassland that were recovered after logging and clearly cutting for plantation. There are four sites of secondary forest (including ML1, ML2, ML4 and ML4) were selected to study on decomposition of litter. Composition of dominant tree species in the sites are Toxicodendron succedanea, Canarium parvum and Cratoxylum polyanthum in ML1; Toxicodendron succedanea, Canarium parvum and Cratoxylum polyanthum in ML2; Styrax tonkinensis, Macaranga denticulata and Toxicodendron succedanea in ML4; Saraca dives, Bischofia javanica, Diospyros in ML4; Styrax tonkinensis, Choerospondias sp. in ML3. The results showed that: Mass of average of the litter in the secondary forest is 9.78 tons/ha; in which proportion of leaves is more than branches (mass of leaves is 7.64 tons/ha, appropriately 76.39% and branches is 2.23 tons/ha, appropriately 23.61%). There are different on mass of the litter between sites but not large, changes from 8.30 tan/ha in ML1 to 11.60 tons/ha in ML4. The records in field showed that composition of species is one of main reasons effecting to ratio leave/branch of the litter in studied sites. Process of decomposition of litter is happen continuous. After 12 months, the quantify of decomposed litter in ML1 is largest with 94.80% and smallest in the ML4 with 62.86%. There is different on dynamic of decomposition of litter between sites. This is shown by data of the distribution of number of the decomposed litter between periods of time sampling. The amount of decomposed litter in dry season is more than in rain season in all sites. According to coefficient k­L year-1, rate of decomposition of litter is arranged in order of following: ML4 < ML2 < ML3 < ML1.

Biodiversity of Nematode spcies composition in land cockroaches in Tam Dao national park, Vinh Phuc province

Biodiversity of Nematode spcies composition in land cockroaches in Tam Dao national park, Vinh Phuc province