• Korean Journal of Environmental Biology
• /
• v.38 no.1
• /
• pp.197-205
• /
• 2020

With the purpose of designing companion planting of groundcover plants for ornamental uses, this study identified the yearly growth characteristics of nine species of different life forms, analyzed the coverage characteristics of individual plants, and suggested combinations of plants suitable for each life form. Polygonatum odoratum var. pluriflorum, Liriope platyphylla and Hosta capitata, as short-grained plants that can grow to more than 20 cm, tended to grow for 60 days after planting in April and maintain their shape thereafter. Their aerial parts started to wither and enter dormancy after September. Saxifraga stolonifera, Dianthus chinensis and Sedum middendorffianum tended to continuously grow until September after planting in April and their growth declined after September. Lysimachia nummularia, as a creeping plant that grows creeping on the ground, started to show a rapid growth three months after planting. Sedum sarmentosum grew slowly until August and the aerial parts started to wither from September when the temperature decreases. The coverage characteristics of these nine species that grow differently after companion planting were surveyed and the growth of Sedum sarmentosum showed the highest number of companions. It was found that Hosta capitata can be companion planted with Sedum middendorffianum, Saxifraga stolonifera, and Lysimachia nummularia. These results indicate that among different shoot growth types species propagated with their stems creeping on the ground or those that can grow vegetatively with non-rhizome parts are more suitable for companion planting with others than those of which rhizomes branch.

• Korean Journal of Weed Science
• /
• v.4 no.2
• /
• pp.135-142
• /
• 1984

To obtain the basic information for weed management in polder land, a colligated assessment on weed distribution and it`s plant sociological indices on Gyewha polder land were arranged. At the situation of assessment, the Gyewha polder land was reclaimed with aim with paddy-rice production. As a result of reclamation, the salinity of most soil samples were below 0.3%, and acidity ranged from pH 5.5 to 6.5. Total weed species were counted as much as 17 species (3 gramineae, 7 cyperucese, and 8 broad-leaved species), and a most dominant species, Scirpus maritimus, were succeeded with Monochoria v., Eleocharis a., and Cyperus d., etc. by reclamation. Declining of soil salinity and soil pH, the number of weed species, individuals, biomass, species diversity, evenness, sociability index were increased, but the population particularity was weaken in tendencies. By developing of reclamation, the weed species which is summer annual broad leaf, wind and water disseminating, and tussock formed species are increased instead of salt-resistant, perennial cyperus, and rhizomatous extending species.

• Journal of Life Science
• /
• v.24 no.12
• /
• pp.1308-1315
• /
• 2014

Biological control using the plant growth-promoting Rhizobacterium (PGPR) has received significant attention in recent years. PGPR has been linked with promoting growth in economically important crops, such as potatoes, tomatoes, and rice. Bacillus mojavensis KJS-3 (Moja-3), isolated from food waste, possesses antifungal properties against Aspergillus terreus, A. fumagatus, A. flavus, and Fusarium redolense, and it may have potential in the development of products for industrial applications. The main purpose of this study was to determine the effects of spraying the PGPR Bacillus mojavensis KJS-3 on the growth of altari radish (leaf number, leaf length, leaf weight, root length, and rhizome length, adjacent portion diameter, and weight) and lettuce (leaf number, length, width, and weight). Three different concentrations of the foliar spray treatment of B. mojavensis KJS-3 were applied to the altari radish and lettuce: the recommended standard concentration of $1{\times}10^9cfu/g$, half the standard concentration of $0.5{\times}10^9cfu/g$, and double the standard concentration of $2{\times}10^9cfu/g$). The B. mojavensis strain foliar spray treatment increased the growth of the leaves and roots of the altari radish and increased the growth of the lettuce leaves. For both plants, the recommended concentration of B. mojavensis KJS-3 produced better growth than half the standard concentration, and the growth was similar with the double dose. This study demonstrates positive effects of Moja-3, suggesting it may be a potential new bio-fertilizer for improving the growth of altari radish and lettuce.

• Korean Journal of Medicinal Crop Science
• /
• v.5 no.1
• /
• pp.62-66
• /
• 1997

This experiment was conducted to evaluated the effect of choline salt of maleichydrazide (C-MH) application on growth and root yield components of Bupleurum falcatum L. Flowering was delayed by C-MH application $17{\sim}35$ days. Twice application was more effective to delay flowering. Application of C-MH 2,000ppm at 30cm to 40cm of plant height reduced plant height 15cm, but increaced highly branches and the growth of root. The dried root yield per 10a was 27% higher in twice application of C-MH 2,000ppm than control plot.

• Korean Journal of Medicinal Crop Science
• /
• v.5 no.1
• /
• pp.67-71
• /
• 1997

Bupleurum falcatum is one of the oldest medicinal crop spontaneously generated as well as cultivated by man and successfully grown during the summer season in Korea. This study was conducted to examine the effect of planting density in the row spacing and hill spacing system using machine seeder on major agronomic traits, yield and labor saving. In 1993 and 1994, a spilt plot design was used with row spacing as the main plot and hill spacing as subplot. Labor saving efficency of the machine seeder reduced 96% than the hand seeding in sowing time required. Number of seeding stand increased, but stem height and number of nodes did not affect with different density in each row and hill spacing. There were reduced with narrow hill spacing on stem diameter, number of branches, shoot weight and root traits. There was no significant interaction between row and hill spacing for any major traits studied except shoot weight. Yield was more increase at 20cm than at 30cm row spacing. For these studies the optiomum density appears to be between drilling or 5cm hill spacing with 20cm row spacing. A highly significant positive correlation was appeared between number of seedling stand and root yield.

• Korean Journal of Medicinal Crop Science
• /
• v.11 no.2
• /
• pp.83-88
• /
• 2003

This experiment was carried out to investigate the effect of the mulching of hairy vetch and pig manure on the growth, yield and crude protein contents of the mulching of hairy vetch and application of animal slurry were treated and investigated in $2000{\sim}2002$. At the first year of cultivation, there were no differences among the treatments in plant height, but second year the growth of plants increased and continued over long times as the hairy vetch mulched and fertilized. The length and diameter of plant root were increased in the plot of hairy vetch mulching and the application of animal slurry. At first year of cultivation, no clear difference was found for among the treatments on dry weight and dry matter ratio in roots. At second year of cultivation, they were increased at in the plot of mulching and fertilizer treatment. The appearances of weeds in the field on Astragalus membranaces were much lower on the plots of live-mulching of hairy vetch than those on the control. The yield of root was 255kg highest in the plot of mulching and animal slurry application of 2-year-old roots. The root yield of Astragalus membranaces was increased about $8{\sim}10%$ compared to that with control, due to supply of nutrients. During the cultivation times, organic matters and N contents in soil increased by the mulching of hairy vetch and the application of animal slurry. The concentration of K, Ca concentration in soil showed a tendency to increase.

• Korean Journal of Environmental Agriculture
• /
• v.19 no.1
• /
• pp.67-71
• /
• 2000

This study was conducted to determine the characteristics of continuous culture and soil texture and their effect on growth and yield of platycodon. The continuous cropping year was treated from 2-years old to 8-years old. The continuous cropping year was correlated with root weight $Y=17.246X+0.95(R^2=0.948^{{\ast}{\ast}{\ast}})$ and root disease incidence rate $Y=12.01X-5.74(R^2=0.946^{{\ast}{\ast}{\ast}})$. The T-N, $P_2O_5$ and MgO content of root were yearly decresed and those of injury roots were higher than those of normal roots. The 2-years old platycodon was treated different soil texture(Loamy sand, Sandy loam, Silt loam, Clay loam). The shoot weight 10.38g, root diameter 1.34cm, root height 16.8cm and root weight 5.46g at silt loam were higher than other soil texture.

• Korean Journal of Environmental Agriculture
• /
• v.19 no.1
• /
• pp.62-66
• /
• 2000

This study was conducted to determine the soil chemical properties and microbial flora of platycodon and their effect on rhizome rot incidence. Sampling sites were Keochang 4, Kimhae 7, Haman 6, Chinju 6 and Koseong 3 fields in Kyongnam province and Hongcheong 6 fields in Kangwon province. The root disease incidence rate was in the order of Haman 56.8%, Hongcheon 52.5%, Kimhae 36.7%, Koechang 35.3%, Chinju 32.3%, Koseong 30.0%. The yield at the Chinju 36.17 Mg/ha was higher than that of Koseong 25.00 Mg/ha, Kimhae 13.57 Mg/ha, Koechang 11.75 Mg/ha, Haman 9.50 Mg/ha, Hongcheon 5.24 Mg/ha. The soil K, $NH_4-N$ content and EC value of injury root were higher than those of normal root. The root CaO content was positively correlated with yield $Y=20505X-367.9(R^2=0.129^{\ast})$. The Fe and Zn content of normal root were higher than those of injury root, while the T-N, $P_2O_5$ and $K_2O$ content of normal root were lower than those of injury root. The population of bacteria, actinomycetes and bacteria/fungi ratio increased in soil of normal root, but that of fungi decreased.

• Korean Journal of Medicinal Crop Science
• /
• v.5 no.4
• /
• pp.294-301
• /
• 1997

Fatty acid, amino acid and organic acid contents were analyzed by gas chromatography, amino acid analyzer and high pressure liquid chromatography, respectively, in order to compare the chemical constituents of upland wasabi plant propagated by seed and auxiliary bud. Total fatty acid content and fatty acid composition of upland wasabi were not affected by the propagation methods. Generally, fatty acid content of leaf was higher than that of other parts such as enlarged stem, petiole, peduncle and root. In fatty acid composition, leaf had highest content of linolenic acid, 60-63%, in plant propagated by both seed and auxiliary bud, followed by palmitic acid, oleic acid and linoleic acid in the order. Similarly, total amino acid content was not influenced by propagation methods but plant propagated by seed had higher amount of amino acid content in enlarged stem, petiole and root than that by auxiliary bud -propagated plant. A total of 17 amino acids including 7 essential amino acids were identified in both seed and auxiliary bud propagations. Like total fatty acid content and fatty acid composition, leaf contained high amount of amino acids, especially glutamic acid, asparatic acid and leucine. Organic acid contents were similar in both propagation methods. The major organic acid in upland wasabi was acetic acid (60.0-78.2%), followed by succinic acid (9.9-29.7%) and malic acid (2.9-7.9%). Maleic acid content was least (0.5-2.6%). The result indicates that content and composition of fatty acid, amino acid, and organic acid in upland wasabi were not influenced by propagation methods.

• Korean Journal of Medicinal Crop Science
• /
• v.5 no.4
• /
• pp.314-317
• /
• 1997

This study was carried out to determine the effect of various fertilizer levels on the growth and yield of Scutellaria baicalensis Georg cultivated after the barley in the southern coastal areas of Korea under the non-mulching condition by direct sowing culture. The flowering date of medium dressing plot $(N\;:\;P_2O_5\;:\;K_2O=9\;:\;13.5\;:\;9 kg/10a)$ and heavy dression plot $(N\;:\;P_2O_5\;:\;K_2O=12\;:\;18\;:\;12kg/l0a)$ were July 23. The flowering date of the medium and the heavy dressing plot was delayed by 3days compared with that of non-fertilizing plot. The growth characteristics such as stem length, diameter of main stem, number of branch per plant, main root length, main root thickness and dry weight of stem leaves were more increased at medium dressing plot than that of other fertilizer levels. The root dry weight of in Scutellaria baicalensis Georg cultivated after barley was highest at the fertilizing plot of N, $P_2O_5\;:\;K_2O$ = 9 : 13.5 : 9kg/10a. The dried-root yield was 178kg in medium dressing plot, 167kg in standard dressing pot, and 126kg in non-dressing plot. The dried-root yield of medium dressing plot was 7% and 41% higher than that of standard dressing pot and non-dressing control plot, respectively.