• Original Research Article

    Evaluation of Growth Characteristics and Pesticide Resistance to Two-Spotted Spider Mite (Tetranychus urticae Koch) on Perilla (Perilla frutescens (L.) Britton) in a Hydroponic Cultivation System in Miryang, South Korea

    밀양지역 수경재배 시스템에서 잎들깨(Perilla frutescens (L.) Britton)의 생육 특성 및 점박이응애(Tetranychus urticae Koch) 살충제 저항성 평가

    Jun Hyoung Jeon, Rameswor Maharjan, Seo Yeon Hong, Youngnam Yoon, Yunwoo Jang, Ok Jae Won, Hyeonsu Lee

    전준형, MaharjanRameswor, 홍서연, 윤영남, 장윤우, 원옥재, 이현수

    The aim of this study was to evaluate the growth characteristics of perilla (Perilla frutescens (L.) Britton), cultivated in a hydroponic … + READ MORE
    The aim of this study was to evaluate the growth characteristics of perilla (Perilla frutescens (L.) Britton), cultivated in a hydroponic system in Miryang, South Korea, and assess the pesticide resistance on perilla leaves focusing on their response to the two-spotted spider mite (Tetranychus urticae Koch). This study was conducted at three hydroponic cultivation sites from November 2023 to May 2024, measuring the growth parameters of perilla plants, such as leave length, width, area, and thickness, under different environmental conditions, including temperature, photoperiod, and nutrient solution characteristics. In addition, several pesticides commonly used in the region were tested for their efficacy in controlling T. urticae, with mortality rates assessed 24, 48, and 72 hours after application. The results revealed significant variation in pesticide efficacy and provided insights into optimal management strategies for T. urticae in hydroponic perilla production. This study provides valuable data for the sustainable production of high-quality perilla leaves using hydroponic systems. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    1 March 2025

  • Original Research Article

    Quality Evaluation of Sweetpotato (Ipomoea batatas L.) Cultivars at Different Transplanting Dates

    고구마 (Ipomoea batatas L.) 품종의 삽식시기별 품질평가

    Yeon-Hu Woo, Hyun-Hwa Park, Yong-In Kuk

    우연후, 박현화, 국용인

    This study examined the impact of transplanting dates (1st: early April, 2nd: mid-April, 3rd: late April, 4th: mid-May) on yield and quality … + READ MORE
    This study examined the impact of transplanting dates (1st: early April, 2nd: mid-April, 3rd: late April, 4th: mid-May) on yield and quality characteristics of three sweet potato (Ipomoea batatas L.) cultivars — Sodammi, Jinyulmi, and Hopungmi — over the duration of 2023 and 2024. While patterns of the yields varied according to cultivar and year, the optimal transplanting period generally fell between the 2nd (mid-April) and 3rd transplanting date. Quality attributes such as hardness, sugar content, and color did not show consistent trends across the transplanting dates. However, ascorbic acid content peaked during the 2nd transplanting date for all the three cultivars. DPPH radical scavenging activity, total phenolic content, and total flavonoid content exhibited different results depending on the cultivar, transplanting date, and plant part; however, these parameters generally showed higher levels in the 2nd transplanting date. Sweet potato leaves demonstrated superior antioxidant activity compared to other plant parts. These findings suggest that the 2nd transplanting date (mid-April) is optimal when considering both yield and quality. This study provides crucial baseline data for determining the best transplanting time to enhance sweet potato quality and utilize various plant parts. Further investigation regarding the effect of environmental conditions on the quality characteristics is required. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    1 March 2025

  • Original Research Article

    Productivity of Sorghum × Sudan grass Hybrid Affected by Combined Fertilization with Different Rates of Livestock Manure Compost and Chemical Fertilizer in Saemangeum Reclaimed Tideland

    새만금간척지에서 가축분퇴비와 화학비료의 절충시비에 따른 수수×수단그라스 교잡종의 생산성

    Hyeoun-Suk Cho, Jin-Hee Ryu, Young-Tae Shin

    조현숙, 류진희, 신영태

    Newly reclaimed tideland is typically sandy and has very low organic matter content and soil nutrient retention capacity. Therefore, the yield of … + READ MORE
    Newly reclaimed tideland is typically sandy and has very low organic matter content and soil nutrient retention capacity. Therefore, the yield of crops produced on reclaimed land is lower than that on regular farmland. Additionally, fertilizers used to grow crops can cause environmental pollution. When cultivating sorghum × Sudan grass hybrids in the Saemangeum reclaimed tideland, we found that the soil nutrient retention and dry matter production could be increased by applying a mixture of organic and inorganic fertilizers. After the test, soil organic matter and available phosphorus contents were higher in the livestock manure compost (LMC) application area. The production of sorghum × Sudan grass hybrids was in the following order: CF > N70+LMC30 = N50+LMC50 > N30+LMC70 > LMC > NF. The fertilization efficiency of inorganic nutrients applied to soil by mixing LMC and CF (chemical fertilizer) was highest for potassium, followed by that of nitrogen and phosphorus. The nitrogen and potassium fertilization efficiency increased as the amount of chemical fertilizer applied increased. Therefore, it was proposed that it would be better to apply fertilizer mixed with compost rather than chemical fertilizer alone when cultivating sorghum × Sudan grass hybrid in the Saemangeum reclaimed land to improve crop production and soil organic matter. The optimal mixing ratio of organic fertilizer (LMC) and chemical fertilizer (T-N) was N70+LMC30 and N50+LMC50. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    1 March 2025

  • Original Research Article

    Optimal Cutting Height of Rye and Hairy Vetch on Nitrogen Yield in Saemangeum Reclaimed Land

    새만금간척지에서 풋거름작물 호밀과 헤어리베치의 예취 높이가 질소 생산량에 미치는 영향

    Young-Tae Shin, Hyeoun-Suk Cho, Kwang-Seung Lee, Bang-Hun Kang, Hak-Sung Lee, Hyeon-Soo Jang, Hee-Kyung Ock, Seo-Young Jeong

    신영태, 조현숙, 이광승, 강방훈, 이학성, 장현수, 옥희경, 정서영

    The soil of the Saemangeum reclaimed land is characterized by higher sand (>70%) and lower clay and organic matter than that of … + READ MORE
    The soil of the Saemangeum reclaimed land is characterized by higher sand (>70%) and lower clay and organic matter than that of agricultural lands. This often creates an unfavorable environment for crop production. Therefore, green manure crops cultivated during the winter season could be one of the recommended practices to improve soil physiochemical properties and supply nitrogen for subsequent crops. The objective of this study was to determine the optimal cutting height of green manure crops as a countermeasure to compensate for the nitrogen requirement of soybeans under a green manure crop–soybean cropping system in Saemangeum reclaimed land. Rye (R100), hairy vetch (H100), and mixture (R50/H50) were cut at 10 cm intervals from the ground, and nitrogen productivity was estimated at different cutting heights. The results indicated that R100 exhibited the highest biomass production, while H100 showed the highest nitrogen content. The cumulative nitrogen production increased with cutting height in the mixed cultivation system (R50/H50), which was the greatest among the treatments. However, the relatively lower nitrogen content of green manure crops grown on Saemangeum reclaimed land compared to that of general field cultivation resulted in a marked reduction in total nitrogen productivity. Cutting rye and hairy vetch at a height of more than 30 cm in mixed cultivation might support at least 20% of the nitrogen requirement for soybean production. However, whole incorporation resulted in the greatest nitrogen supply. This study provides a valuable agronomic practice for establishing effective green manure crop management on Saemangeum reclaimed land. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    1 March 2025

  • Original Research Article

    Prediction of Regional Emergence Timing of the Exotic Weed Amaranthus patulus under Climate Change

    기후변화에 따른 외래잡초 가는털비름 (Amaranthus patulus) 지역별 출아시기 예측

    Hyun Hwa Park, Yong In Kuk

    박현화, 국용인

    This study investigates how temperature and moisture variations due to climate change affect the emergence of Amaranthus patulus, an exotic weed, … + READ MORE
    This study investigates how temperature and moisture variations due to climate change affect the emergence of Amaranthus patulus, an exotic weed, and aims to create a precise model for predicting its emergence timing to aid in effective weed management. We assessed the emergence rates of A. patulus seeds in growth chambers and greenhouses across various temperature and soil moisture conditions. The Gompertz model was used to analyze the relationship between emergence rate, days after sowing, and cumulative soil moisture. Additionally, we used weather data from multiple locations to predict regional emergence timing. Experiments conducted at varying temperatures (25/15°C, 30/20°C, 35/25°C, and 26°C, 29°C, and 31°C) indicated that increased temperatures expedited emergence initiation and maximized emergence rates, though delays were noted under specific scenarios. Nonlinear regression with the Gompertz model revealed that a cumulative effective temperature of 74 °C (in growth chambers) and 160°C (in greenhouses) was needed for 50% emergence, with model accuracy varying by environmental conditions. Analysis of soil moisture levels (40%, 60%, 80%, 100%) showed a positive correlation between moisture and emergence rates. Regional predictions suggested climate change could reduce the emergence period by over 10~17 days. This study underscores the utility of germination prediction models incorporating temperature and soil moisture as tools for weed management. Future research should focus on developing comprehensive models that consider multiple environmental factors and enhancing field application. - COLLAPSE
    PDFXMLCitation
    ReferencesInformation
    1 March 2025
리스트형 보기썸네일형 보기
Journal Informaiton The Korean Journal of Crop Science The Korean Journal of Crop Science
Online Submission
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close