• Research Article

    Community Structure and Species Composition of Pinus densiflora for. erecta Forest in Mt. Cheonchuk

    천축산 일대 금강소나무림의 군집구조 및 종조성

    Jun Gi Byeon, Byeong Joo Park, Sung Hyun Joo and KwangIl Cheon

    변준기, 박병주, 주성현, 천광일

    This study was conducted to analyze community structure and species composition of Pinus densiflora for. erecta Stand in Mt. Cheonchuk (653 m ... + READ MORE
    This study was conducted to analyze community structure and species composition of Pinus densiflora for. erecta Stand in Mt. Cheonchuk (653 m). Field survey was carried out from June to September in 2013. 74 plots (20×20 m) were set up, 5 herb layer plots (3×3 m) were constructed for each plot, and there, Diameter at Breast Heigh t(DBH), height, environmental factor, annual growth were measured. Vascular plants were surveyed as following; 66 family, 165 genus, 211 species, 2 sub species, 29 variety, 6 form 248 taxa. Results of cluster analysis for P. densiflora for. erecta forest, 3 communities were divided into; Quercus mongolica (P-1), Quercus variabilis (P-2) and Quercus aliena-Stephanandra incisa (P-3). There were significant environmental factors that organic layer, annual growth, CEC, total total nitrogen, organic matter and pH for each community. As a result of DCA, P-1 and P-2 were distributed large range of environmental factors but relatively limited in P-3. Distributions of herb layer were affected by sand, cation exchange capacity, silt and total nitrogen. Results of MRPP test for herb layer communities, it was significantly analyzed (A=0.003, P<0.008). Species diversity index was highly recorded in P-3 and influenced by cation exchange capacity, total nitrogen, annual growth in consequence of NMS analysis. - COLLAPSE
    February 2020
  • Research Article

    Effect of the Landscape Crop, Chrysanthemum zawadskii on Reducing Soil Loss in Highland Sloping Area

    경관작물 구절초의 고랭지 경사지 밭 토양유실 경감 효과

    Su Jeong Kim1†, Hwang Bae Sohn, Su Young Hong, Tae Young Kim, Jung Tae Lee, Jung Hwan Nam, Dong Chil Chang, Jong Taek Suh and Yul Ho Kim

    김수정, 손황배, 홍수영, 김태영, 이정태, 남정환, 장동칠, 서종택, 김율호

    There is high vulnerability of soil loss in sloping and highland used for agricultural production due to the low surface covering in ... + READ MORE
    There is high vulnerability of soil loss in sloping and highland used for agricultural production due to the low surface covering in summer rainy season. This study evaluated the surface-covering rate of landscape crop in reducing soil loss in the highland. The experiment was conducted in a 55% sloped lysimeter with three treatments of planting density using Korean native chrysanthemum, and investigated the soil coverage rate, run-off water, and soil erosion. The three treatments according to the degree of soil covering are bare soil as the control treatment TC, coverage rate of 43-59% for treatment T1, and, coverage rate of 63-81% for treatment T1, and T2. During the cultivation period, the average reduction of run-off water was 71% for treatment T1 and 76% for treatment T2, which are better, compared with the control. The reduction in eroded soil was 84% in treatment T1 and 98% for treatment T2, which is also better than the control treatment. Therefore, it is possible to alleviate the soil loss in sloping lands by planting chrysanthemum, which is superior among the perennial plant species and considered as a crop with economic value. - COLLAPSE
    February 2020
  • Research Article

    Growth Characteristics of Veronica rotunda var. subintegra (Nakai) T.Yamaz. according to Several Cultivation Conditions

    몇 가지 재배조건에 따른 산꼬리풀의 생육특성

    Sang In Lee, Soo Ho Yeon, Ju Sung Cho and Cheol Hee Lee

    몇 가지 재배조건에 따른 산꼬리풀의 생육특성

    This study was aimed to establish the most effective approach for the cultivation of Veronica rotunda var. subintegra (Nakai) T.Yamaz. plants ... + READ MORE
    This study was aimed to establish the most effective approach for the cultivation of Veronica rotunda var. subintegra (Nakai) T.Yamaz. plants, which was expected as new ornamental plants. We conducted an experiment using plug seedlings, varied the seeding container type and seeding rate. We also varied seedling quality, planting container, soil type, and shading ratio. Seedling quality was used seedlings produced from different seeding containers and seeding rates. The seedling quality were seeding growth using 162, 200, and 288 trays, and seedings rate was used seedlings produced by sowing 1, 2, 4 and 6 seeds. As a result, 162 trays of seedlings were suitable for use in this study. Plants grown with one seed per cell in individual cells exhibited increased individual growth, but those grown with four seeds per cell exhibited better growth for the whole plant. According to seedling quality, seedlings produced in the 162 trays or with four seeds per cell showed higher growth than other seedlings. In the cultivation of V. rotunda var. subintegra (Nakai) T.Yamaz., seedling growth increased depending on container capacity for both shoot and root parts. Container material had no significant impact on seedling growth. Seedlings grew the best on horticultural substrate, and showed better growth on mixed soils with high decomposed granite content than on peatmoss. - COLLAPSE
    February 2020
  • Research Article

    Effect of Seed Weight and Storage Method on Germination and Seedling Growth of Camellia japonica

    동백나무의 발아 및 유묘 생장에 미치는 종자 무게 및 저장방법의 영향

    Hee-Kyoung Kang, Su-Ji Choi and Hong-Seon Song

    강희경, 최수지, 송홍선

    This study was carried out to provide basic information for mass breeding and cultivating the saplings of Camellia japonica. The germination rates ... + READ MORE
    This study was carried out to provide basic information for mass breeding and cultivating the saplings of Camellia japonica. The germination rates did not show definite tendency according to the changes of seed weight at room temperature and 4℃ dry storage conditions. The germination rate of 4℃ wet sand storage was increased with seed weight, but showed very low germination rate for 120 days of storage. The germination rate was above 80% in 60 days, 90 days and 120 days, respectively, at 4℃ wet filter paper storage conditions. The average days taken for those germinations were about 30 days at room temperature and 4℃ dry storage conditions, but wet storage (sand, filter paper) condition took the shortly nearly 13 days for those germinations. Leaf number, leaf dry weight, stem diameter and root dry weight were higher than total average by more than 1.21 g for seed weight. Stem length was higher than the average by more than 1.01 g, plant dry weight was higher than the average by more than 0.81 g, and stem dry weight was higher than the average by more than 0.61 g. In the case of seed weight becoming heavier, seedling growth was good but T/R ratio tended to decrease. In order to increase the mass production of seedlings using Camellia japonica seeds, we need to specify the weight and size of those seeds. The 4℃ wet filter paper storage condition was evaluated as the most efficient method for the seed storage used for seeding. - COLLAPSE
    February 2020
  • Research Article

    Using Phenolic Compounds and Some Morphological Characters as Distinguishing Factors to Evaluate the Diversity of Perilla Genetic Resources

    Awraris Derbie Assefa, Yi Jin Jeong, Ju-hee Rhee, Ho-Sun Lee, On-Sook Hur, Jae-Jong Noh, Na-Young Ro, Ae-Jin Hwang, Jung-Sook Sung and Jae-Eun Lee

    Awraris, Derbie Assefa1, Jeong, Yi Jin2, Rhee, Ju-hee3, Lee, Ho-Sun3, Hur, On-Sook4, Noh, Jae-Jong3, Ro, Na-Young4, Hwang, Ae-Jin4, Sung, Jung-Sook5 and Lee, Jae-Eun4*
    The objectives of this study were to evaluate total phenolic content (TPC) and individual phenolic compounds in leaves of perilla genetic resources ... + READ MORE
    The objectives of this study were to evaluate total phenolic content (TPC) and individual phenolic compounds in leaves of perilla genetic resources, assess whether they could be used as distinguishing factor among germplasms, and evaluate their relationship with some quantitative and qualitative morphological characters. TPC and individual phenolic compounds were determined using Folin-Ciocalteu method and UPLC-PDA system, respectively. Wide variations in TPC (7.99 to 133.70 ㎎GAE/g DE), rosmarinic acid (ND to 21.05 ㎎/g DE), caffeic acid (ND to 1.17 ㎎/g DE), apigenin- 7-O-diglucuronide (ND to 2.21 ㎎ luteolin equivalent (㎎LUE)/g DE), scutellarein-7-O-glucuronide (ND to 5.25 ㎎ LUE/g DE), and apigenin-7-O-glucuronide (ND to 2.81 ㎎ LUE/g DE) were observed. Intensities of green pigment at abaxial and adaxial leaf surfaces were positively correlated with phenolic compounds whereas leaf length and width had negative correlation. Purple pigmented accessions were shorter in leaf length and width but exhibited higher amount of phenolic compounds compared to green pigmented accessions in most cases. Leaf shape was not related with content of phenolic compounds, color of leaves, and length/width of leaves. TPC and individual phenolic compounds along with morphological characters could be useful distinguishing factors for perilla genetic resources. - COLLAPSE
    February 2020
  • Research Article

    Agricultural Characters, Phenolic and Nutritional Contents, and Antioxidant Activities of Pigeon Pea (Cajanus cajan) Germplasms Cultivated in the Republic of Korea
    Yu-Mi Choi, Do Yoon Hyun, Sukyeung Lee, Hyemyeong Yoon, Myung-Chul Lee, Sejong Oh, Ho-Cheol Ko, Myoung-Jae Shin, Onsook Hur, Jung Yoon Yi and Kebede Taye Desta
    Pigeon pea (Cajanus cajan) is an important legume species that produces seeds that are rich in phenolic compounds and dietary nutrients. The ... + READ MORE
    Pigeon pea (Cajanus cajan) is an important legume species that produces seeds that are rich in phenolic compounds and dietary nutrients. The aim of the present study was to evaluate the agricultural characters, phenolic and nutritional contents, and antioxidant capacities of seeds from 82 pigeon pea germplasms cultivated in the Republic of Korea. The accessions exhibited compact (24.39%), semi-spreading (74.39%), or spreading (1.22%) growth habits and determinate (89.02%), indeterminate (8.54%), or semi-determinate (2.44%) flowering patterns. Days to 75% maturity ranged from 30 to 72 d, and yield per plant ranged from 6.00 to 148.60 g. Meanwhile, total phenolic, crude protein, crude fiber, and dietary fiber contents ranged from 16.42 ± 0.62 to 29.67 ± 0.43 ㎎ gallic acid equivalent per g of dried extract, from 16.76 ± 6.74% to 22.61 ± 0.05%, from 4.70 ± 0.24 to 8.63 ± 0.02%, and from 12.98 ± 0.71 to 33.19 ± 1.50%, respectively. In addition, DPPH radical-scavenging capacity ranged from 1.61 ± 0.10 to 16.04 ± 2.30 ㎎ ascorbic acid equivalent per g of dried extract, and Trolox equivalent antioxidant capacity ranged from 3.03 ± 0.86 to 42.24 ± 0.72 ㎎ Trolox equivalent per g of dried extract. Phenolic content was correlated with both DPPH radical-scavenging capacity (r = 0.63) and Trolox equivalent antioxidant capacity (r = 0.29). Nine accessions (IT170290, IT170291, IT170270, IT170276, IT170379, IT170386, IT170388, IT170418, and IT170340) exhibited early maturity, compact and erect growth habits, and above average antioxidant activities and phenolic and protein contents. In addition, accessions IT170290 and IT170291 were especially promising pigeon pea germplasms to grow, owing to various favorable characteristics (e.g., high yield and dietary fiber content). Hence, these accessions could be useful cultivars to the Republic of Korea if considered in future agricultural systems. - COLLAPSE
    February 2020