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유기과수 포장에 자생하는 월년생 초종들의 피복작물로서 평가를 위한 Biomass와 주요 양분공급 잠재능 조사
임경호,최현석,권오도,강삼석,임순희,김윤경,이한찬,정석규,Lim, Kyeong-Ho,Choi, Hyun-Sug,Kwon, Oh-Do,Kang, Sam-Seok,Yim, Sun-Hee,Kim, Yoon-Kyeong,Lee, Han-Chan,Jung, Seok-Kyu 한국유기농업학회 2012 韓國有機農業學會誌 Vol.20 No.2
유기과원에서 자생하는 겨울나기 한해살이 초종을 조사하여 과수에 양분공급을 할 수 있는 유망한 녹비자원을 선정하기 위해서 2009년에 수행되었다. 전남지역에 위치한 유기과원 총 13곳을 선정하여 4월과 6월에 자생하는 초종을 조사하였다. 건물중은 4월에 쥐보리가 6월에는 참새귀리가 가장 높았다. 초종별 질소와 칼리의 토양 환원량은 4월에는 쥐보리와 새완두 살갈퀴가 높았고 6월에는 참새귀리가 가장 높게 나타났다. 본 시험에서는 두과 작물인 새완두와 살갈퀴가 토양에 충분한 양의 양분을 환원할 수 있는 유망한 녹비자원으로 판단되었다. 인산은 초종에 상관없이 10~15년생의 과일나무가 생장하기 위해 필요한 수준 이하를 나타내어 추가의 외부 공급이 필요하였다. This study was conducted to select promising green manure crops, providing sufficient amount of nutrients for satisfying fruit tree growth, with the overwintering cover crops grown in organic orchards in 2009. The cover covers were investigated in 13 organic orchards in Chonnam province in April and June. The dry matter in cover crops observed in April and June was the highest for Lolium multiflorum Lam. and Bromus japonicus Thunb., respectively. Total N and K production in April was the highest for Lolium multiflorum Lam, Vicia hirsuta (L.) S. F. Gray and Vicia angustifolia var. segetilis (Thuill.) K. Koch., respectively, with Bromus japonicus Thunb. in June. This study showed that the leguminous crops, Vicia hirsuta (L.) and Vicia angustifolia, would be the prospective cover covers as the both crops provided sufficient amount of N and $K_2O$ into the soil. Amount of $P_2O_5$ producing from all cover crops provided less than nutrient levels than those of recommended nutrient requirement for satisfying 10- to 15-year-old fruit tree growth.
임경호(Kyeong Ho Lim),박영오(Young Oh Park),배병욱(Byung Uk Bae) 한국물환경학회 2000 한국물환경학회지 Vol.16 No.2
Rapid sand filters in water treatment plants (WTP) is one of the most important step in order to remove fine particle including pathogens such as Criptosporidium and Giardia. Filters should be assessed based on their capability to achieve a treated water quality of less than 0.1 NTU on a continuous basis to ensure the integrity of the filtration process as a viable barrier in the treatment scheme. This is less than the 1.0 NTU standard, but operation of filters to produce filtered water quality confidence that pathogens are being removed prior to the last barrier, disinfection. In this study, to optimize existing filtration unit process, rapid sand filters working in S-WTP were evaluated for various factors. The results of comprehensive performance evaluation were followings. From the filter media analysis, effective size and uniformity coefficient of media was 0.90∼1.0 ㎜ and 1.44∼1.47, respectively. Therefore, the replacement of media is needed to optimize filter performance. Media loss was caused by air binding in the filter bed and improper operation of backwashing process. The ratio of the water used for filter washing to the amount of filtered water was 2.5∼3.0% during the winter and 1∼2% in the summer. At the beginning of a filter run, filtered water turbidity was over 0.5 NTU during about 20 min. Shorter filter run lengths was attributed to an overabundance of filter clogging algae (Synedra. sp), air binding, and too much floc in the filter influent.
하 , 폐수처리장 유입 및 유출수의 유기오염물 지표 상관성에 관한 연구
임경호(Kyeong Ho Lim),김광수(Kwang Soo Kim) 한국수처리학회 2002 한국수처리학회지 Vol.10 No.1
N/A In this study, correlations between COD_Cr, COD_Mn and BOD of samples from domestic and industrial wastewater treatment plants were investigated to set up the basic guideline for altering the index of organic matter content from COD_Mn to COD_Cr. In the case of domestic wastewater, BOD was more favorable for the estimation of organic matter content than COD_Mn and COD_Cr because microbial products which had no harmful effect on the environment, were counted as organic pollutant during COD test. However, in the case of industrial wastewater, COD_Mn and COD_Cr were suitable because organic and inorganic toxic pollutants inhibited microbial respiration during BOD test. It could be suggested that COD_Cr became meaningful after the installation of advanced treatment processes such as activated carbon in the industrial wastewater treatment plant.
연구보문 : 토양환경; 녹비작물의 파종시기와 방법이 무농약 배과원의 시기별 토양화학성과 엽내 무기성분, 과실품질에 미치는 영향
임경호 ( Kyeong Ho Lim ),최진호 ( Jin Ho Choi ),김월수 ( Wol Soo Kim ),김현지 ( Hyun Ji Kim ),송장훈 ( Jang Hoon Song ),조영식 ( Young Sik Cho ),임순희 ( Sun Hee Yim ),정석규 ( Seok Kyu Jung ),최현석 ( Hyun Sug Choi ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.1
BACKGROUND: This study was conducted to investigate the effects of seeding timing and method of rye and/or hairy vetch on seasonal soil and foliar nutrient concentrations as well as fruit quality in a pesticide-free pear orchard. METHODS AND RESULTS: The treatments included as followed: single seeding of rye in September (Sep-Mono), November (Nov-Mono), and January (Jan-Mono), or mix seeding of rye+hairy vetch in November (Nov-Mix) and January (Jan-Mix), or sod culture as a control. Cover crops or vegetation was mown and mulched on the soil surface in April and May for two years. Nov-Mix treatment produced the highest dry matter weight of 12,070 kg ha-1, with the lowest dry matter weight for sod culture (6,520 kg ha-1), following Jan-Mix (7,030 kg ha-1). Nov-Mix treatments increased potential amount of N, P, and K from the raw materials of the cover crops as well as improved soil physical properties. Nov-Mix treatments overall elevated soil pH, EC, organic matter, and P2O5 in May compared to other cover crop treatments or sod culture. The difference of the seasonal nutrient concentrations in leaves or fruit qualities were not consistently occurred amongst treatments. CONCLUSION: Nov-Mix treatments showed playing role in a substitute of a chemical fertilizer. Delayed seeding of cover crops such as Jan-Mix did not increase the potential dry matter production due to the short growing period, and the seeding time would affect the dry matter production of cover crops.
연구보문 : 피복작물 이용방법이 양분공급량과 배 과실품질에 미치는 영향
임경호 ( Kyeong Ho Lim ),김월수 ( Wol Soo Kim ),최현석 ( Hyun Sug Choi ),이인 ( In Lee ),조원기 ( Won Ki Cho ),구희연 ( Hui Yeon Koo ),이연 ( Youn Lee ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.3
This study was conducted to evaluate the effects of ground cover treatments on the nutrient contribution of the cover crops and fruit quality of ``Niitaka`` pear (Pyrus pyriforia) trees, in order to develop utilization of the ground covers as an organic nutrient source in a pear orchard. The study was conducted at diligent farmer in Boseong in Chonnam, and the treatments included; 1) sod culture, 2) winter cover crop [ryegrass+hairy vetch], and 3) winter [ryegrass+hairy vetch]+summer [green solgo(sudan grass (Sorghum bicolor L.))+nemajanghwang (crotalaria (Crotalaria juncea L.)] cover crops. Winter+summer cover crops provided greater amounts of residue, followed by winter cover crop and sod culture. The difference of amounts of residue from the ground cover treatments affected to the total N, P, and K contents in the soil, which were greater nutrient levels than those of recommendation of a conventional pear orchard. Greater amounts of residue from the ground covers increased organic matter and concentrations of K, Ca, and Mg in soil. Fruit quality was not affected amongst ground cover treatments.
유기과수원에 자생하는 여러해살이 초종 특성과 양분공급 추정
임경호(Kyeong-Ho Lim),최현석(Hyun-Sug Choi),송장훈(Jang-Hoon Song),조영식(Young-Sik Cho),조광식(Kwang-Sik Cho),마경복(Kyeong-Bok Ma),원경호(Kyeong-Ho Won),정석규(Seok-Kyu Jung) (사)한국생물환경조절학회 2012 생물환경조절학회지 Vol.21 No.3
전남지역 13곳의 유기과원에서 자생하는 다년생 초종을 조사하여 과수 생장을 위한 양분 공급원으로의 적합한 초생식물을 탐색하기 위하여 수행되었다. 과원에 발생한 초종은 4월과 6월 그리고 8월에 조사하였다. 4월과 6월에 각각 발생한 개밀과 큰개기장에서 가장 높은 건물중을 보였고, 이는 질소와 인산 칼리 고정량을 크게 증가시켰다. 8월에는 다년생초생 발생량이 4월과 6월에 비교하여 감소하였다. 예초된 개밀과 큰개기장의 초생 잔사량은 20년생의 과일나무가 생장하기 위해 필요한 연간 평균 질소(20kg/10a), 인산(11kg/10a), 그리고 칼리(19kg/10a) 수준을 충족시킨 것으로 관찰되었다. This study was initiated to find out the suitable perennial ground covers naturally grown in thirteen organic orchards in Chonnam Province as a organic nutrient source for maintaining annual fruit tree growth. The ground covers were observed in April, June, and August in the orchards. Agropyron tsukusinense and Panicum virgatum observed in April and June, respectively, produced the highest dry weight, which increased amounts of N, P₂O?, and K₂O, mineralizing from the residue in the ground covers. The occurrence of perennial ground covers in August decreased compared to April and June. Amount of residue in mowed Agropyron tsukusinense and Panicum virgatum satisfied nutrient demand (N; 20 kg/10a, P₂O?; 11 kg/10a, and K2O; 19 kg/10a) to achieve the annual growth of twenty-year old fruit tree.