수도(水稻)에 대(對)한 질소시비반응(窒素施肥反應)의 품종간(品種間) 차이(差異)

이춘수,신철우,곽한강,이강만,안윤수,박준규,Lee, Choon-Soo,Shin, Cheol-Woo,Kwak, Han-Kang,Lee, Kang-Man,Ahn, Yoon-Soo,Park, Jun-Kyu 한국토양비료학회 1985 한국토양비료학회지 Vol.18 No.2

수원지방(水原地方)의 농가포장(農家圃場)에서 1978년(年)~83년(年) (6개년(個年)) 식양토(埴壤土)인 보통답(普通畓)에서 수도품종별(水稻品種別) 질소(窒素) 시비반응(施肥反應) 및 질소(窒素) 생산효율(生産效率) 등(等)을 검토(檢討)하였는바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 2차회귀식(次回歸式)을 적용(適用), 최다수량(最多收量)을 생산(生産)하기 위(爲)한 질소시비(窒素施肥) 최적량(最適量)은 13.9g~28.0kg/10a 범위(範圍)로 품종(品種)에 따라 차이(差異)가 크므로 질소내비성(窒素耐肥性)을 고려(考慮)하여 품종(品種)을 선정(選定), 재배(栽培)함이 필요(必要)하였다. 2. 질소(窒素) 시비최적량(施肥最適量)이 높았던 품종(品種)에서는 수확기(收穫期) 질소함량(窒素含量)(경엽(莖葉)) 및 총질소(總窒素) 흡수량(吸收量)(경엽(莖葉)+곡실(穀實))이 증가(增加)하였으나 최적량(最適量) 시용시(施用時) 시비(施肥) 및 흡수질소(吸收窒素)의 생산효율(生産效率)과 질소이용율(窒素利用率)은 오히려 감소(減少)하였다 3. 품종별(品種別) 무질소구(無窒素區) 정조수량(正租收量)에 대(對)한 질소(窒素) 최적량(最適量) 시용시(施用時) 정조수량(正租收量)의 증수효과(增收效果)를 증수율(增收率)로서 볼 때 29~121%의 범위(範圍)로서 품종간(品種間) 질소응수(窒素應酬)의 차이(差異)가 현저(顯著)하였다. 4. 질소(窒素) 최적량(最適量) 시용시(施用時) 질소응수(窒素應酬)가 큰 품종(品種)은 수확기(收穫期) 총질소(總窒素) 흡수량(吸收量), 시비(施肥) 및 흡수질소(吸收窒素)의 생산효율(生産效率)과 질소이용률(窒素利用率)이 높았다. An attempt to evaluate yield response and efficiency of N fertilizer was made with the data obtained from various rice cultivars during 1978 to 1983. 1. The optimum rate of N fertilizer for maximum yield varied from 13.9 to 28.0 kg/10a with rice varieties. 2. The cultivars with high optimum N levels were high in N content (straw) and N uptake (straw+grain) at harvesting stage, but low in production efficiency and use efficiency of N. 3. The yield increment at the optimum rates of N in comparison with no N application among the rice varieties were 29-101%. 4. The cultivars with hish yield increment at optimum rate were high in the N content (straw+grain), and production efficiency at harvesting stage.

임산물 농가의 경영 비효율성 원인 분석 - 대추, 떫은감, 밤 농가를 대상으로 -

이춘수,정호근 한국유기농업학회 2023 한국유기농업학회지 Vol.31 No.4

This study analyzed the management efficiency of jujube, bitter persimmon, and chestnut farms using data envelopment analysis (DEA). And this study analyzed causes affecting management inefficiency of those farms using the two-step method. The main findings are as follows. First, as self and employment labor costs are increased, it is important to reduce labor costs which account for 60~70% of the total production cost. Second, efforts to improve management efficiency are needed as overall efficiency of farms were decreased. Third, a pesticide cost per 10a representing a level of pesticide had a negative effect or did not have a statistically significant effect on the management efficiency. This implies that expanding environmentfriendly production by reducing pesticides is effective for improving the management efficiency. Fourth, as leading farms were more efficient than general farms, technology dissemination and education through leading farms are important for improving efficiency, and efforts are needed to promote exchange between leading and general farms.

농가의 스마트팜 설비 이용률 및 스마트팜이용인식에 대한 조사연구 -전남 스마트팜 농가를 대상으로-

이춘수,조윤희,송경환 한국유기농업학회 2023 한국유기농업학회지 Vol.31 No.3

This study investigates the facility use status of smart farming farmers to improve facility use rate of farmers. To this end, a survey was conducted on smart farming farmers in Jeonnam province, and the main survey contents are as follows: facility use rate, the reasons for low facility use, the perception of the introduction and use of smart farming etc. As a result of the survey, many farmers have introduced smart farming facilities even though they do not have enough use capacity. Thus it is necessary to improve the use capacity of farmers. Second, the average facility use rate of farmers was 65.1%, and 37.5% of respondents did not use even 50% of smart farming facilities. To improve the use rate, education on how to use facilities and continuous consulting support for farmers are needed. And the largest number of farmers perceived the risk like crop damage or facility failure due to poor use of facilities. This means that risk management due to the smart farming facilities is important. Third, farmers answered that rapid and continuous repair service were the most important when using facilities. Thus it is important to foster rear industries such as maintenance companies to stably operate smart farming facilities.

용지 호수공원의 수질관리 방안에 관한 연구

이춘수,서규태,문병현,이택순 7개 국립대학교 환경연구 논문집 공동발행 위원회 2003 공업기술연구 Vol.3 No.-

This study was performed for water quality management of Yonggi Lake Park in Changwon City. The results are as follows; The water quality of the lake was deteriorated during summer season because of algal blooming. It was estimated that existing treatment capacity of the lake water was not sufficient to meet the target lake water quality. And so the lake water circulation period, 40 days should be shorten to below 30 days by increasing the treatment capacity. Fountain and air supply facilities for 02 supply and mixing caused rather resuspension of solid settled at the bottom of the lake. It was also evident that the extended detention of water in the lake resulted in water quality deterioration. Consequently it is important to supply high quality water from other sources. Especially lower temperature water had better effect on improvement of the water quality.

한국 기독교의 신비주의와 성령론

이춘수 한국기독교회사학회 2010 교회사학 Vol.9 No.1

민주적 시민운동과 정치교육

이춘수 한국사회과교육학회 1996 시민교육연구 Vol.22 No.1

주요기상인자(主要氣象因子)가 벼의 질소시비량(窒素施肥量)에 미치는 영향(影響)

이춘수,곽한강,황기성,박준규,Lee, Choon-Soo,Kwak, Han-Kang,Hwang, Ki-Sung,Park, Jun-Kyu 한국토양비료학회 1987 한국토양비료학회지 Vol.20 No.1

An analysis was made on optimal N fertilizer for high yielding and ordinary rice varieties and their dependence upon the climatic conditions during growth stage in 1971-1979. The results obtained were summarized as follows; 1. The coefficient of variation for optimum N rates were 19.1% for high yielding varieties and 21.9% for ordinary varieties. And the those of yields at optimum N levels were 7.0% for high yielding varieties and 9.9% for ordinary varieties. 2. Optimum N fertilizer rates for high yielding varieties were 22.4kg/10a in favorable climatic years and 16.1kg/10a in unfavorable climatic years. As for ordinary varieties, optimum N levels were 19.2kg/10a in favorable climatic years and 13.0kg/10a in unfavorable climatic years. Accordingly, more N should be applied in favorable climatic years regardless of varieties. 3. This difference was derived from sunshine hours, rainfall, and relative humidity. Optimum N rates were correlated positively with sunshine hours, and negatively with rainfall and relative humidity. 1971~'79년(年) 사이 7개년간(個年間) 다수계(多收系)와 일반계(一般系) 벼품종(品種)을 공시(供試)하여 실시(實施)한 질소(窒素) 시비량성적(施肥量成績)과 벼생육기간(生育期間)의 주요기상요인(主要氣象要因)인 일조시간(日照時間), 강수량(降水量), 평균기온(平均氣溫) 및 상대(相對) 습도(濕度)와의 관계(關係)를 검토(檢討)한 결과(結果), 이를 요약(要約) 하면 다음과 같다. 1. 년차간(年次間) 질소시비량(窒素施肥量)의 변이계수(變異係數)는 다수계(多收系) 품종(品種) 19.1%, 일반계품종(一般系品種) 21.9% 이었으며 질소적량구(窒素適量區) 수량(收量)의 변이계수(變異係數)는 다수계품종(多收系品種) 7.0%, 일반계품종(一般系品種) 9.9% 이었다. 2. 질소(窒素)는 기상호적년도(氣象好適年度)의 경우 평균시비량(平均施肥量)(다수계품종(多收系品種)) 18.8kg/10a, 일반계품종(一般系品種) 15.6kg/10a)에 비(比)하여 17~23% 증비(增肥)하고, 기상불량(氣象不良)인 년도(年度)는 14~17% 감량시용(減量施用)이 합리적(合理的) 이었다. 3. 질소시비량(窒素施肥量)과 주요기상요인(主要氣象要因)과의 관계(關係)에서 일조시간(日照時間)(7~9월(月))과는 유의(有意)한 정상관(正相關), 강수량(降水量)(7~9(月)) 및 상대습도(相對濕度)(8~9월(月))와는 유의(有意)한 부(負)의 상관(相關)을 보였으나 평균온도(平均溫度)와는 뚜렷한 관계(關係)가 없었다.

민주적 시민 운동에 대한 정치수업 연구

이춘수 한국사회과교육학회 1997 시민교육연구 Vol.24 No.1

골반강에서 발생한 Localized fibrous tumor 1례

이춘수,장병진,박현순,김성용,박해영 大韓泌尿器科學會 2001 Korean Journal of Urology Vol.42 No.1

쌀소득보전직불제를 고려한 쌀 생산농가의 효율성 분석

이춘수,양승룡 한국농식품정책학회 2011 한국농식품정책학회 학술대회 논문집 Vol.2011 No.2