• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.53 no.3
• /
• pp.279-284
• /
• 2008

This study carried out to investigate the variation of flavonoids contents in mungbean (Vigna radiata L.) according to plant parts, harvesting time, growth stage, and sowing time. Vitexin and isovitexin were found only in the seeds but not in the leaves, petioles, stems, and roots. Vitexin and isovitexin in seeds were detected only in the seed coat at concentration of 51.1 and $51.7\;mg{\cdot}g^{-1}$, respectively, but not in the cotyledon. There were no differences in the content of vitexin and isovitexin in mungbean seeds according to early, recommended and late harvesting times. Rutin in leaves was isolated and identified as a functional substance. The content of rutin was the highest in the leaves and higher in the order of petioles and stems. However, there was no rutin in the seeds, roots, and pods. The highest rutin content in the leaves, petioles and stems was observed at the 3rd leaf stage, which was higher in the order of the 5th and 7th leaf stage.

• Korean Journal of Environment and Ecology
• /
• v.21 no.2
• /
• pp.161-167
• /
• 2007

To investigate the structure and the conservation strategy of Korean native species, the Abies koreana forest at sub-alpine zone centering on the Witsaeorum(1,714m) shelter in Hallasan National Park was selected for a survey subject with 20 plots $(10{\times}10m)$ set up with random sampling method. Mean importance percent(MIP) of Abies koreana showed the highest numerical value-57.7%, and that of faxus cuspidata was the next value-16.2%. High positive correlations were shown between Taxus cuspidata and Prunus maximowiczii, Euonymus alatus; Betula ermani and Berberis amurensis var. quelpaertensis, Prunus sargentii; Prunus maximowiczii and Euonymus alatus; Berberis amurensis var. quelpaertensis and Prunus sargentii. Vigor of Abies koreana was so low that as much as 6.44% of total number of Abies Koreana investigated were dead. DBH of dead individuals ranged mainly from 5cm to 15cm.

• Korean Journal of Plant Resources
• /
• v.10 no.4
• /
• pp.375-381
• /
• 1997

This study was conducted to determine the effect of seedling and division nursery stock size on the growth and yield of Wasabia japonica cultivated with cold water from Soyang Dam. As seedling and division nursery stock size were enlarged, their growth and yield were higher. In the case of division nursery stock, the rhizome yield per 10a were 782kg for large one, 723kg form medium one and 567kg for small one, and commercial rates - the percentage of rhizomes that weigh over 40g - were 87% for large one,80% for medium one and 55% for small one. In the case of seedling, large one brought out yield of 575kg/10a while medium and small one brought out low yield of 408kg/10a, and 421kg/10a, respectively. And the commercial rates from seedling were 60% for large one. 13% for medium one and 20% for small one.

• Korean Journal of Plant Taxonomy
• /
• v.44 no.2
• /
• pp.77-80
• /
• 2014

Here we report a previously unrecorded species of Korean Myriophyllum L. (Haloragaceae). This taxon, M. oguraense Miki has been regarded as a Japanese endemic for some 60 years. Myriophyllum oguraense and its closely related M. verticillatum L. share the characteristic of having pectinate emergent leaves that are similar in shape to, but much smaller than, the submerged leaves. However, the primary characteristic that differentiates these taxa is the turion shape (club shaped in M. verticillatum and linear in M. oguraense). The common name, 'Gin-dong-a-mul-su-sae-mi' was also newly given considering its characteristic turion shape. Photographs and a key to Korean Myriophyllum species are provided in addition to complete descriptions including information on nomenclatural types, distributions and specimens examined.

• KSBB Journal
• /
• v.10 no.4
• /
• pp.393-400
• /
• 1995

As a part of the .study on the multiple propagation and use of Dendropanax mcrbifera, distribution of this tree and component analysis of Golden Lacquer were investigated to reappear the Golden Lacquer, traditional paints. These results were summarized as follows. The natural growth habitat of Dendropanax morbifera was observed in 8 sites(Wando, Sanghwangbong, etc.), we could be found that Duryun nountain in Haenam for the first time. Dendropunax morbifera has grown from 100 to 450m above the sea level, appeared high frequency in the 200m. The soil pH of natural growth site was pH 4.9 to pH 5.8. Dendropanax morbifera grew in the area containing considerable moisture in that its contents was 16.5% to 27.4%. In community observation, dominance and community index of Bogildo and Chejudo was 3.3 in the forest tree layer and Wando was showed in the sub-forest tree layer mainly. In the growth conditions, Bogildo appeared the highest growth state that diameter of height of human chest was 1.0 to 20cm and tree height was 0.2 to 9m. As result of IR and GC-MS analysis, main component of Golden Lacquer was ${\beta}$-selinene and capnellane-8-one.

• Korean Journal of Plant Resources
• /
• v.19 no.4
• /
• pp.555-561
• /
• 2006

This study was carried out to investigate the suitable place for growth by analyzing the ecological environment of multi-use tree species to be spontaneous in Chungbuk Province, and derive the suitable place for forestation. At the test of the independence of multi-use tree species, as the significant correlation of the other tree species except Quercus acutissima - Zanthoxylum schinifolium was different by the survey location, it is concluded that the share relation of the ecological niche among tree species is largely influenced not only by the affinity of tree species but the growth environment. As the result of the correlation analysis between environment factors and tree clusters, it was analyzed that tree clusters were much influenced by the topography and the altitude among the variable environment factors; the topography, altitude, the direction of hillside, the slope and the number of tree species appearing. It was investigated that the cluster of Acer mono - Betula costata was distributed to the valley from low hillside to have high altitude, and the clusters of Kalopanax pictus - Ulmus davidiana var. japonica and Fraxinus rhynchophylla - Rhus trichocarpa were sporadically distributed to broad location because their geographical adaptation powers are high.

• Spatial Information Research
• /
• v.3 no.1
• /
• pp.47-53
• /
• 1995

The weed survey in lowland rice fields through Korea was conducted in 1992 to determine a change of the weed communities based on different regions, soil types, planting methods, and cultural practices. GIS was applied to identify a spatial analysis of predominant weed species in specific region. On behalf of vegetatine analysis such as absolute and relative density, absolute and relative frequency, importance value, and summed dominance ratio(SDR), there was highly dominant with a perennial weed species, Eleocharis kuroguwai Ohwi over whole country. However, in particular it was most predominant at southem area of Gyunggi province in Korea. Thus, rice farmers of this area have to introduce a specific comperhensive control strategy against this predominant weed species.

• Korean Journal of Environment and Ecology
• /
• v.7 no.2
• /
• pp.155-163
• /
• 1994

To investigate the structure and the conservation strategy of natural forest at Paekryunsa-Hyangcho kpong area in Tokyusan, 21 plots (400$m^2$) set up with random sampling method. Four groups were classified by cluster analysis. High positive correlations was proved between Tripterygium regelii and Acer tschonoskii var. rubripes, Viburnum sargentii and Betula ermanii, Corylus heterophylla var. thunbergii and Stephanandra incisa, Betula costata and Cornus controversa, Acer mono and Tilia amurensis, Tilia amurensis and Kalopanax pictum, Lonicera maackii and Viburum sargentii, and Betula ermanii, Acer tschonoskii var. rubripes and Taxus cuspidata, and Viburnum sargentii, and High negative correlations was proved between Acer pseudo-sieboldianum and Viburnum sargentii, Tripterygium regelii and Stephanandra incisa, Acer tschonoskii var. rubripes, and Stephanandra incisa. Species diversity(H') of investigated area was calculated 0.9402~1.2473. Taxus cuspidata, Betula ermanii and Abies koreana at Hyangchokpong area in Tokyusan should be conserved.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.31 no.2
• /
• pp.156-161
• /
• 1986

Silage productivity and resistance to rice black streaked dwarf virus (RSDV) of six Korean-improved and six US introduced corn genotypes were tested in the southern part of Korea. There was a negative correlation between culm length retarded by RBSDV and coefficients of variance of culm length. Frequency distribution of culm length could be classified as three genotypic groups according to the type of distribution and percentage of RBSDV diseased plants. There were negative correlations between percent RBSDV diseased plants at harvest and culm length, percent ear bearing plants, silage yield, or ear yield, but percent RBSDV diseased plants did not related to the ear/silage ratio and stover yield. Silage yield of Pioneer XCF38 was highest, but that of Suweon 89 and NC 6131 was lowest. However, there was not signi-ficant difference in silage yield among the remaining genotypes. Pioneer XCF38, Suweon 89, and Jinjuok were quite resistant to RBSDV, but Suweon 19, Kwangok, Hoengseongok, Jecheonok, and Pioneer 3424 were susceptible and NC 6131 was most susceptible to RBSDV. Although Jinjuok and Suweon 89 were resistant to RBSDV, silage yield was not high because of early senescence of leaves after silkillg.

• Applied Biological Chemistry
• /
• v.39 no.5
• /
• pp.343-348
• /
• 1996

Experiments were carried out to find possibility of economic production of SCP in mixed culture by Cellulomonas sp. KL-6 and E. coli LI-10. The best cell growth was obtained at the ratio of 1 : 1(v/v) in mixed culture. When these strains were mixed culture, cell growth was increased to about 63%, compared with those of single culture of strain KL-6. It was found that the majority of the population during growth in mixed culture consisted of strain KL-6. $CaCO_3$ added to the medium as the ratio of 0.1% was enhanced medium pH. Cell growth increased in that circumstances. These strains produced much amounts of cellobiose, but glucose was not detected in filter paper medium. When these organisms were cultured under the optimal medium for 4 days, cell mass was produced $1.0\;g/{\ell}$. The results showed the increase of cell mass up to 53% than those produced in CMC medium.