• Research Article

    Changes in Soil Chemical Properties of Rice Paddy Fields in Ganghwa

    강화군 논 토양의 화학성 변동

    Heo, S. and I. B. Lee

    허성, 이인복

    This study was performed with data obtained from monitoring the soil chemical properties of rice paddy soils in Ganghwa. One hundred and ... + READ MORE
    This study was performed with data obtained from monitoring the soil chemical properties of rice paddy soils in Ganghwa. One hundred and fourteen soil sampling sites were selected from different regional and topological areas from 2014 to 2018. Soil pH value tended to increase gradually within the optimal pH range. The concentrations of organic matter (OM) and available phosphate (P2O5) were lower than the standard concentrations, but the contents of exchangeable cations were higher than those of the standard, showing significant differences. The average value of available silicate (SiO2) content was found to be proper within the standard concentrations. There were no significant changes in the contents of pH and OM according to soil texture. However, the available P2O5 and exchangeable cations were significantly different among different soil textures. The contents of exchangeable cations in sandy loam soil were significantly lower than those in loam and silt loam. The soil pH and OM also showed no differences according to the soil topological analysis results. The available P2O5 content was significantly higher at mountain foothills and the exchangeable K and Mg contents were more accumulated in the marine plains. Based on the results of regional analysis, Naega-myeon showed highest pH values and the exchangeable Mg and available P2O5 contents tended to be increased in Gyodong-myeon than other regions. The insufficient portions of OM and available P2O5 were 47.0% and 84.7%, respectively, in 2018. The available SiO2 value had a significantly positive correlation with soil pH and exchangeable Ca contents when subjected to a correlation matrix and principal component analyses. The reason for this correlation is thought to be that silicate fertilizer can increase the concentration of exchangeable Ca and pH value. - COLLAPSE
    March 2020
  • Research Article

    Comparisons of Concentration in Functional and Volatile Components of Several Wild Baby Vegetables

    몇 가지 산채 어린잎 채소의 기능성 및 방향성 성분 함량 비교

    Baek, J. P.

    백준필

    This study was conducted to compare the concentration of functional components such as total phenolic, flavonoid, cartenoid, anthocyanin, and DPPH free radical ... + READ MORE
    This study was conducted to compare the concentration of functional components such as total phenolic, flavonoid, cartenoid, anthocyanin, and DPPH free radical scavenging activity and volatile concentration in several wild vegetables as Lactuca indica var. laciniata H. ‘Seonyang’, Lactuca indica var. laciniata H. ‘Godam’. Lepidium sativum L., Lactuca indica var. laciniata H., Cirsium setidens L., and Ligularia stenocephala L. Results of the total phenolic, flavoniod, carotinoid and anthocyanin concentration were shown as highest in Cirsium setidens L. and Ligularia stenocephala L. But the DPPH scavenging activity was not shown significantly difference among six wild baby vegetables. As the results of compared volatile components in wild baby vegetables, were detected to total 234-297 peaks. Generally, major volatile components were detected small molecular weight such as α-pinene, β-phelleandrene, β-pinene, limonene, camphene, linalool, but these results were shown the major component as caryophyllene. Followed the result, Cirsium setidens L. and Ligularia stenocephala L. were prefered wild baby vegetables for Korean food culture and aromatic characteristic. - COLLAPSE
    March 2020
  • Research Article

    Effects of Storage Periods on Germination ofLarix kaempferi Seeds

    낙엽송 종자 저장 기간에 따른 발아 특성

    Kim, J. H., H. I. Sung, K. S. Choi, J. J. Kim, C. O. Won and K. S. Song

    김정훈, 성환인, 최규성, 김종진, 원창오, 송기선

    This study was conducted to survey the germination characteristics of the seeds of Larix kaempferi, which is a major plantation species in ... + READ MORE
    This study was conducted to survey the germination characteristics of the seeds of Larix kaempferi, which is a major plantation species in Korea, according to the storage period. The germination experiment was conducted at 25°C, targeting seeds collected in 1996, 2004, 2008, 2009, 2010, and 2011. Prior to the germination experiment, seeds were subjected to different soaking treatments for 1, 2, 3, and 7 days including non-treatment. The germination rate in L. kaempferi seeds was observed to be higher in those that were collected recently; that is, the seeds that were stored for a shorter period of time. The germination rate of the seeds collected in 2011, which were stored immediately after collection, was 20.7%. The seeds from 1996 and 2004 did not germinate at all. The seeds from the year 2008 showed the lowest germination rate at 2.7%. The whole T50 of the test-subjected seeds was observed to be 3-7 days. Germination uniformity tended to decrease with shorter storage period. Soaking treatment lowered the mean germination time and uniformity, except for the stored seeds (collected in 1996 and 2004), which did not germinate. Based on the results of these experiments, such as a reduction in germination rate according to the seed storage period, it seems likely that more detailed investigations into the changes in seed viability and storage management are needed with respect to L. kaempferi seeds. - COLLAPSE
    March 2020
  • Research Article

    Effect of Substitution of Nitrite with Gardenia jasminoides Extract on Quality Characteristics of Chicken Meat Patty

    아질산염 대체제로 치자 추출물의 첨가가 닭고기 패티의 품질특성에 미치는 영향

    Pak, J. I., H. S. Jung, S. K. Lee, G. Y. Kim, J. W. Jhoo and S. M. Kang

    박재인, 정현식, 이성기, 김거유, 주진우, 강선문

    This study investigated the effect of substitution of nitrite with Gardenia jasminoides extract (GJE) on quality characteristics of chicken meat patty. Samples ... + READ MORE
    This study investigated the effect of substitution of nitrite with Gardenia jasminoides extract (GJE) on quality characteristics of chicken meat patty. Samples were prepared with five different treatments (n = 5; control : no GJE or sodium nitrite (SN); T1 : 200 ppm SN; T2 : 0.5% GJE + 150 ppm SN; T3 : 1.0% GJE + 100 ppm SN; T4 : 1.5% GJE) and then stored for 9 days at 4℃. The pH value decreased significantly (p < 0.05) with the increase in the addition level of GJE. Higher (p < 0.05) 2-thiobarbituric acid reactive substances (TBARS) content was observed in the groups with a higher level of added GJE and T4 showed the highest (p < 0.05) TBARS content after 3 days. Peroxide value was higher (p < 0.05) in T4 than in T1, T2, and T3 at day 9. T3 and T4 showed lower (p < 0.05) L* (lightness) value and higher (p < 0.05) a* (redness) and b* (yellowness) values compared to that in the control and T1. Water-holding capacity (WHC) declined faster (p < 0.05) in T3 and T4 than in the other groups during storage. These findings suggest that GJE added as a substitute for SN adversely affects the lipid oxidation stability and WHC; however, it improves the red color in chicken meat patty. - COLLAPSE
    March 2020
  • Research Article

    Changes in the Chemical Properties of Different Co-digestion Digestates caused by Aeration

    상이한 혼합 혐기소화액의 폭기처리에 따른 화학적 성분 변화

    Byeon, J. E., H. J. Lee, J. W. Ryoo and S. G. Hwang

    변지은, 이홍주, 류종원, 황선구

    To evaluate the effects of aeration on co-digestates, we investigated the chemical contents of aerobic liquefying processes. The six co-digestates were continuously ... + READ MORE
    To evaluate the effects of aeration on co-digestates, we investigated the chemical contents of aerobic liquefying processes. The six co-digestates were continuously aerated with 0.1 m3air/m3·min for 54 days. The three measured chemical contents (T-N, BOD5,and CODMn)were all decreased after aeration. Meanwhile, NO3-N, DO, and ORP were all increased after aeration. A standard procedure for fertilizers in anaerobic solutions has not yet been set in agriculture. The livestock liquid manure should have a proportion of 0.3% for T-N, T-P, and T-K. In this study, the aerobic liquid fertilizer was above the standard level(0.3%), suggesting the utilization of co-digestates. - COLLAPSE
    March 2020
  • Research Article

    Distribution Status of Imported Livestock Products in Korea: Focusing on imports and Distributors

    FTA 수입축산물 유통실태 분석 – 수입 · 유통업체를 중심으로 -

    Yun, Y. S. and B. H. Lee

    윤영석, 이병훈

    This study aims to seek an efficient distribution structure that can maximize the effect of FTA tariff reductions in Korea’s imported ... + READ MORE
    This study aims to seek an efficient distribution structure that can maximize the effect of FTA tariff reductions in Korea’s imported livestock market. As a result of the study, it was found that the imported livestock market in Korea did not sufficiently reflect the effects of the FTA tariff reduction on consumer prices due to the irrational distribution structure. In conclusion, in order to maximize the positive effects of the FTA in the imported livestock market, the government needs to make active and detailed efforts. - COLLAPSE
    March 2020
Journal Informaiton Agriculture and Life Sciences Research Institute Journal of Agricultural, Life and Environmental Sciences
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