포인세티아총채벌레(Echinothrips americanus Morgan)의 온도발육모형

공민재,김광호,김재군,박홍현,전성욱 한국환경생물학회 2022 환경생물 : 환경생물학회지 Vol.40 No.4

The temperature-dependent development of Poinsettia thrips, Echinothrips americanus was studied at eight constant temperatures (15.0, 17.5, 20.0, 22.5, 25.0, 27.5, 30.0, and 32.5±1°C), 65±5% RH and photoperiod of 16L:8D conditions. The developmental stages were divided into egg, 1st instar, 2nd instar, pre-pupa, pupa, and adult. The total developmental time in the immature stage was 40.4 days at 15.0°C and 11.6 days at 30.0°C, and it decreased with increasing temperature. The lowest temperature of the whole immature period was 10.7°C, and the cumulative temperature to complete the entire immature period was 217.4 degree days. The optimal development temperature (Topt) for the whole immature stage was estimated to be in the range of 30.51-31.21°C. Topt for each immature stage was 31.64-35.47°C at egg, 30.02-33.08°C at 1st instar, 29.16- 34.43°C at 2nd instar, 27.63-29.21°C at pre-pupa, and 29.81-30.12°C at pupa. In the analysis of the six non-linear models, Logan 6 model was the most appropriate as Zi (Weighting Factors) was 0.18. 포인세티아총채벌레(Echinothrips americanus)의 온도 별 발육은 15.0~32.5±1°C까지 2.5°C 간격(65±5% RH, 16L : 8D) 8개 온도 조건에서 알, 1령, 2령, 전용, 번데기, 성충으로 구분하여 조사하였다. 전체 발육기간은 25.0°C 이상의 온도 조건에서는 온도가 증가할수록 발육기간은 짧아지는 경향을 보였다. 온도별 발육기간은 15.0°C에서 40.4일, 30.0°C에서는 11.6일로 고온으로 갈수록 발육기간은 짧아졌으나, 32.5°C에서는 발육기간이 다시 길어져 12.5일이었다. 선형모형을 이용한 전체 발육기간의 발육영점온도는 10.7°C, 유효적산온도는 217.4일도였다. 비선형발육 모형을 이용한 최적발육온도(Topt) 범위는 알은 31.64∼35.47°C, 1령의 30.02∼33.08℃, 2령은 29.16∼34.43°C, 전용은 27.63∼29.21°C, 번데기는 29.81∼30.12°C, 전체 발육 기간은 30.51∼31.21°C였다. 비선형발육모형에 대한 가중치 지표(Zi)는 Logan 6모형이 0.18로 가장 적합하였다.

논 태우기가 논 포장 및 농경지 서식 절지동물에 미치는 영향 평가

공민재,전성욱,권경화,송순이,김광호 한국환경과학회 2021 한국환경과학회지 Vol.30 No.12

It is known that the effect of traditional agricultural techniques of burning farmland such as paddy fields and fields gradually declines and affects both the fauna and flora of the rice paddy as well as pests. Therefore, in this study, a study was conducted to investigate the effects of burning rice paddy fields and rice paddy fields levee on the control effect of winter pests inhabiting agricultural land and the amount of pests generated and damaged during the growing season. As a result of this study, the pest control effect of incineration reduces not only the density of pests, but also beneficial insects (natural enemies) and non-reptiles. It is judged that burning has a very low insect control effect. It is expected to be used as basic data to create a sustainable agricultural environment, such as minimizing various negative effects such as pest control effects, wildfires, and air pollution caused by incineration, and suppressing unnecessary incineration and fine dust generation.

논습지의 생태계서비스 가치평가를 위한 기능 및 요인분석

공민재,이병모,김남춘,손진관 한국습지학회 2014 한국습지학회지 Vol.16 No.2

최근들어 세계환경의 화두는 습지와 더불어 논습지 그리고 습지의 생태계서비스 기능에 집중 조명되고 있지만, 논습지의 생태계서비스를 평가 할 수 있는 연구체계가 부족한 실정이다. 따라서 본 연구는 기존의 습지평가체계를논습지에 적용하여 습지로서 논의 가치를 평가해보는 동시에 논습지 중심의 평가체계를 구축하는 기초자료로 활용하고자 연구를 진행하였다. 연구 대상지는 고도와 토양을 기준으로 16곳을 선정하였다. 습지평가 결과 연구대상지 16곳은 총점 110점~118점, 평균 2.17~2.50으로 선행연구 사례지인 호수형습지, 소택형습지, 하천형습지와 비교해도 습지로서 가치가 인정되었다고 할 수 있다. 하지만 고도, 토성에 따라서는 평가결과의 차이는 없었으며, 보전가치는 모두 같게 나타났다. Pearson 상관분석을 통해 보전가치에 가장 밀접하게 작용하는 요인을 찾아 본 결과,면적이 상관관계가 있는 것으로 나타났다. 그러나 기존의 습지평가체계로 논습지에 적용하기에는 한계가 있는 것으로 사료되어 논습지 평가를 위해서는 재배유형, 지형적 특성, 식생특성, 생육환경, 생물다양성 등의 다양한 후속연구를 통해 습지평가체계를 보완할 필요가 있는 것으로 판단하였다.

The Effect Analysis of Vegetation Diversity on Rice-Fish Mixed Farming System in Paddy Wetland

공민재,김창현,이상민,박광래,안난희,조정래,김봉래,임종악,이창원,김형수,남홍식,손진관 한국습지학회 2018 한국습지학회지 Vol.20 No.4

Organic farming practices including loach based ecosystem-farming have been demonstrated to be effective in conjunction with rice farming to increase yield and quality. This new form of farming combines agriculture and fishery and is quickly developing into a new industry. The current study investigated the effect of rice-fish mixed farming system on the vegetation-diversity function. Vegetation within the four study sites was surveyed and analyzed based on plant taxonomy. The vegetation survey demonstrated that 127 taxa of 38 families, 100 genera, 107 species, and 20 varieties occurred within the study sites. A total of 15 plant species taxa occurred in the rice-fish mixed paddy fields with a fish habitat and did not occur in the conventional paddy field lacking fish habitat. This difference is thought to arise from differences in moisture requirements for vegetation. Life form analysis demonstrated differences in hemicryptophytes, therophytes, and hydrophytes according to fish habitat. The naturalized plants identified were also determined to be species widely distributed throughout Korea. Frequency analysis demonstrated that the rice-fish mixed paddy fields with a fish habitat had a high ratio of both obligate and facultative wetland plants relative to the conventional paddy field. Based on the study results, it is likely that vegetation-diversity will increase with environment diversity. However, no statistical significance was observed according to paddy types. Future research should aim to identify additional environmental factors, including the existence of fish habitat, habitat area, depth of fish habitat, hydrological parameters, water quality, and paddy soil environment, to enhance vegetation-diversity and biocultural diversity.

도시공원의 생태기능 향상을 위한 토양 이화학적 특성 기준에 대한 연구

공민재,권태근,김창현,김남춘,신유경,안난희,이상민,손진관,Kong, Minjae,Kwon, Taeguen,Kim, Changhyun,Kim, Namchoon,Shin, Yukyung,Ahn, Nanhee,Lee, Sangmin,Son, Jinkwan 한국환경과학회 2020 한국환경과학회지 Vol.29 No.4

The purpose of this study was to analyze the soil environment of urban neighborhood parks and to use them as basic data for evaluating the ecological functions of urban parks such as groundwater regeneration, flood control, microclimate regulation, adsorption and purification. The landscape design criteria were generally evaluated as advanced, and further monitoring and studies are needed to evaluate the various ecological functions. It is also necessary to improve the phosphoric acid and nitrogen contents, which tended to be low. In addition, continuous monitoring is needed to assess the proper soil environment according to the biological species, and to evaluate the ecological functions. The results of this study can be used to evaluate the groundwater recharge of urban parks. In particular, when the land of the neighboring park is used for various purposes, the level of access of the user may be increased. Therefore, factors that may adversely affect the user's health, such as heavy metals and organic matters, should be selected and selected as management criteria. In addition, follow-up studies considering fertilization standards suitable for trees and growth of introduced vegetation, etc. are needed urgently to improve the soil environment.

유기자원 연용이 유기농 옥수수 밭토양의 화학성과 옥수수 수량에 미치는 영향

공민재,안필균,정정아,이초롱,이상민,안난희,Kong, Minjae,An, Philgyun,Jung, Junga,Lee, Chorong,Lee, Sangmin,An, Nanhee 한국환경과학회 2020 한국환경과학회지 Vol.29 No.12

This study performed to conduct a test to increase the amount of appropriate organic matter input to organic upland soil, soil fertility, and its effect on the chemical changes and yield of corn in soil due to organic use. The pH level of the T1, T5, and T6 treatment zones where livestock excreta was used was raised to 6.0-6.5, the optimal range of the soil in Korea, and it was confirmed that the pH value was appropriate. Electrical Conductivity (EC), organic content (OM), and total nitrogen (T-N) were also identified as a trend of continuous increase. The quantity of corn gradually increased from 74.1% to 96.4% over the four-year period with the use of organic materials compared to the beginning of the test, and the utilization efficiency of nitrogen has also increased. The results of the study were found to have been able to examine the increase in quantity and changes in soil chemistry through crop cultivation using organic materials such as natural materials, green manure crops, and livestock manure compost, and it is also believed that the changes due to various factors such as soil environment, soil microbes, and climate conditions need to be made through continuous research.

아시아 벼 재배지역의 이동성 멸구류 3종의 발생 양상

공민재,김원영,김재군,박부용,조점래,정인홍,박홍현 한국국제농업개발학회 2023 韓國國際農業開發學會誌 Vol.35 No.1

아시아 벼 재배지역의 이동성 멸구류 3종의 발생 양상

공민재,김원영,김재군,박부용,조점래,정인홍,박홍현 한국국제농업개발학회 2022 韓國國際農業開發學會誌 Vol.34 No.4

The occurrence of Laodelphax striatellus (SBPH) in Korea ranged 0.3-19.3 individuals in 2021, and 0.3-23.3 individuals in 2022 during the investigation period. Nilaparvata lugens (BPH) was not observed in 2021, but N. lugens (BPH) showed the highest number(82.0 inds.) in late September of 2022. The occurrence of Sogatella furcifera (WBPH) was not severe during the study period. Compared to Korea’s situation, N. lugens (BPH) and S. furcifera (WBPH) in Asian regions showed high occurrence in Bangladesh and Sri Lanka. The results of the field survey could be confirmed with the occurrence pattern of about once or twice in their regions. Continuous monitoring is required for the best control of planthopper species in rice production regions of Asia. We anticipate that exchange of occurrence information and establishment of a control cooperation system will improve rice productivity in Asian regions by preventing outbreak of planthopper species and reducing damages caused by the species. 아시아 벼 재배지역의 벼 생산성 향상 및 경제적 피해 손실을 줄이기 위해 이동성 해충 멸구류 3종의 발생양상을 살펴본결과, 2021년 국내의 애멸구 발생량은 조사지역에서 평균 약0.3~19.3마리 내외, 2022년에는 평균 약 0.3~23.3마리 내외로확인되었다. 2021년 국내 조사지역에서 벼멸구 발생은 확인되지 않았으며, 2022년에는 최고밀도 82.0마리를 기록하였다. 흰등멸구 또한 발생량이 심하지 않았다. 국내에 비해 방글라데시와 스리랑카 지역에서는 벼멸구와 흰등멸구 발생량이 많았으며, 필드 조사결과 연간 약 1~2회 발생패턴이 있는 것으로 확인되었다. 아시아 벼 재배지역의 멸구류 방제를 위해 지속적인 모니터링이 필요하며 발생정보 교류 및 방제협력체계 구축 통해 멸구류 방제시기 결정과 멸구류 피해를 줄여 벼 생산성 향상에 도움이 되길 기대한다.

토마토 유기농 시설재배에서 천적활용 증진을 위한 동반식물 투입효과

공민재,한은정,정승민,이욱재,이병모 한국환경과학회 2023 한국환경과학회지 Vol.32 No.12

This study determined the mechanisms of selection of companion plants that will increase natural enemies and compared and analyzed the effect of suppression of pest density and changes in pest and natural enemy density and spatial distribution, aiming to select suitable companion plants to control major pests that are problematic in organic tomato facility cultivation. As a result of the companion plant selection, 13.5 days were identified in the area with daily flowers among five species of flowering plants. In the experiment to determine the timing of natural enemies, the best results were found in the treatment group introduced two weeks before the pest occurred. As a result of the actual package test, farmers could see that the density of greenhouse pollen decreased significantly (100-500% for adults and 11-67% for larvae compared to no treatment) in the treatment with companion plants. Based on the results of this study, we expect that ecological pest management using companion plants that attract natural enemies will help to increase biodiversity through vegetation management, secure the safe production of organic products and improve the sustainability of agriculture.

절지동물 다양성 조사를 통한 논두렁 소각 저감방안 연구

공민재(Kong, Minjae),김광호(Kim, Kwang-Ho),전성욱(Jeon, Sungwook),권경화(Kwon, Kyoung-Hwa),송순이(Song, Soon-I),박홍현(Park, Hong-Hyun) 한국환경정책학회 2022 한국환경정책학회 학술대회논문집 Vol.2022 No.2