• 제목/요약/키워드: improvement of productivity

검색결과 1,510건 처리시간 0.035초

입원환자의 투약체계와 방법의 개선을 위한 현장연구 (Field Study For The Improvement of Medication System and Method for Inpatients at General Hospital)

  • 유형숙;권영미;송미숙;김형애;박경숙
    • 간호행정학회지
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    • 제1권1호
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    • pp.147-211
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    • 1995
  • Medication is a kind of medical service and a therapeutic nursing function which takes large portion of nursing service and requires complicated procedures. So many different medical personnel should be involved and cooporate each other in order to accomplish medication. Medication is also a vital nursing service, So nurse feels heavy responsibi lity in that she gives medication to the patient finally, so she has much responsibility if medication error is happened. Therefore it seems very important to clarify the problem of medication system and method, and find the subculture of medication situation because it may promote nursing productivity. The study was conducted to 1. Describe and interpret medication situation. 2. Find out the problem of medication system and method and on alternatives. 3. Compare the medication system and method of hospitals which are located in Seoul with object hospital Ethnographic methodology was used to study medication situation by doing participant observation and interview of health care personnel. Ten nurses and three nurse aids were interviewed. Two residents and internists, two phamacists and two accountants were also interviewed. Data was obtained and analized according to Developmental Research Sequence introduced by Spradly. On the basis of this data the results were as follows. 1. The overall flow of medication system was devided into six stage : first, checking doctor's order : second writing doctor's order, : third, transfering slip into the related departments such as account department, pharmacy : fourth, distribution of medication from pharmacy to unit : fifth, identifing medication by nurses : and finally, medicating to the patient. Behaviorors have been under a lot of stress in that they have to do much works, especially paperworks, So too much time were needed. They also have been suffered interpersonal conflicts among health care personnel and role conflicts in the process of doing medication service. 2. In the process of checking order, the problem was that too much time was required for checking order and paperwork. The more the order changes the more the paperwork is. Nurses have been suffering difficulties in calling internist in order to get bill. Even if writing down slip for medication order is doctor's job, Sometimes nurse has been expected to write slip by doctors or nurse would write slip beacuse of two much complexities and efforts for calling doctors. If the slip were incorrect, much time complicated procedures were more required for correcting it. So delay of administering drug would be resulted consequently. Drugs were delivered from pharmacy to units by delivery agent and phamacist. But because drugs were delivered without arranging room number of patient. Nurse should rearrange drugs in order of the room number So it had made waste time and effort, and Even when emergency drugs were needed, Prompt delivery of drug was not easy because of many reasons. For nurses, it took too long in the identification of the right drug. Actually nurses have heavy burden when medication error happens because nurse is the final actor who gives medication to the patient, So every three shift nurse ought to check drugs as soon as every shift begins. That's why it took too much time due to repeated confirming procedure. When nurses had to go patient room in order to give medications, there were difficulties in watching patient until the patient take medicine correctly. So it was impossible to check every patient wheather he took medicine or not especially in hectic situation. 3. There were many hospitals in Seoul which have similar medication system and method as object hospital according to the results of questionaire. This means that many hospitals have been suffering srimilar problems which were identified in object hospital. 4. Recommendations for promoting simplification of medication system and method were the following : Redesigning of slip from two pieces of paper into one : early discharge announcement system, and slip confirming through computer and controlling of period of prescreption from one day to two or three days : designing personal drug storage box for each patient and using it. If nurses follow the recommendations, they will make medication short & simple, and also have enough time of direct nursing care 5. Even though there were many difficulties in medicating patients. Medication itself has been considered as a caring among nurses because it makes rapport between nurse and patient. So nurses had better accept medication as a portion of nusing service not a original portion of phamacist. There are some limits in this research in terms of confining to only one unit of one hospital, and treating it especially in view of nurses' aspects, So further researchs should be continnued from various kmds of viewpoints of doctors, phamacists and so on. ${\cdot\cdot\cdot}$. Especially esthnographic study of computerized medication system and method seems to be followed.

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정보시스템 사용과 성과에 있어서 자발성의 조절효과에 관한 연구 (A Study on the Moderating Effect of Perceived Voluntariness in the Organizational Information System Usage and Performance)

  • 이승창;이호근;정창욱;정남호;서응교
    • Asia pacific journal of information systems
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    • 제19권2호
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    • pp.195-221
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    • 2009
  • According to an industry report, a large number of organizations have invested in Organizational Information System(OIS) in the past few years. Several research results indicate that successful investments in OIS lead to productivity enhancement, while failed ones result in undesirable consequences such as financial losses and dissatisfaction among employees. In spite of huge investments, however, many organizations have failed in achieving the hoped-for returns from OIS. Thus, understanding user acceptance, adoption, and usage of new IS(Information Systems) is an important issue for IS practitioners. Indeed, study of the user acceptance of new information system has been one of the most important research topics in the contemporary IS literature. Several theoretical models are tested to examine 'user acceptance' and 'usage behavior' in IS context. While many research models incorporate 'ease of use' or 'usefulness' as important factors in explaining user acceptance, Technology Acceptance Model(TAM) has been one of the most widely applied models in user acceptance and usage behavior. Even in recent IS studies that employ theories of innovation diffusion in the area of IS implementation, a major focus has been on the user's perception of information technologies. In this research, we study 'voluntariness' as an important factor in IS acceptance by users. Voluntariness is defined as "the degree to which the use of the innovation is perceived as being voluntary, or of free will" When examining the diffusion of accepting OIS, a thoughtful consideration should be given to 'perceived voluntariness.' Current article has following research questions: 1) What models are appropriate to explain the success of OIS? and 2) How does the 'voluntariness' affect the success of OIS? In order to answer these questions, a research model is proposed to describe the detailed nature of association among three independent variables (IT usage level, task interdependency, and organizational support), a mediating variable (IS usage), a dependent variable (perceived performance), and a moderating variable(perceived voluntariness). The central claim of this article is that organizations hardly realize expected returns from OIS investments unless perceived voluntariness is effectively managed after operating OIS. As an example of OIS in this study we have selected the Intranet of Republic of Korea Air Force (ROKAF). ROKAF has implemented the Intranet in an attempt to improve communication and coordination within the organization. To test our research model and hypotheses, survey questionnaires were first sent out to 400 Intranet users. With the assistance of ROKAF, Intranet users were initially identified among its members, and subjects were randomly drawn from the pool. 377 survey responses were finally returned. The unit of measurement and analysis in this research is a personal level. Path analysis based on structural equation modeling was used to test research hypotheses. Construct validity represents accordance between the theoretical base concept of constructs and its measurement items. Tests for the reliability and discriminant validity are accepted, thus verifying our survey instrument. In this research, we have proposed a conceptual framework to highlight the importance of perceived voluntariness after organization deploys OIS. The results of our analysis present several key finding. First, all three independent variables (IT usage level, task interdependency, and organizational support) have significant effects on IS usage, which will eventually improve performance. Thus, IS usage plays a mediating role between antecedent variables (IT usage level. task interdependency, and organizational support) and performance improvement. Second, the effect of the task dependency was the highest for IS usage among the three antecedent variables. This is highly plausible since one of the Intranet's major capabilities is to facilitate communication among members within an organization. Accordingly, we conclude that the higher the task dependency, the higher Intranet usage. The effect of user's IT usage level was the second, while the effect of the organizational support was the third. Finally, the perceived voluntariness plays a pivotal role in enhancing perceived performance in personal level after launching the Intranet. Relationships among investigated variables were significantly different between groups with a high level and a low level of voluntariness. The impact of the Intranet usage on the performance was greater in the higher level voluntariness group than in the lower one. For the lower level voluntariness group, the user's IT usage had the highest effect on the Intranet usage among the three antecedent variables. In short, our study suggests that the higher the perceived voluntariness is the more IS usage will be. Perceived voluntariness was found to have a moderating effect on the relationships among user IT usage level, task interdependency, IS usage, and perceived performance, supporting all the hypotheses on the moderating effect. Most of all, user IT usage level has the strongest influence on IS usage, indicating that users with superior IT usage are more likely to enjoy a high level of perceived performance.

서계 박세당(西溪 朴世堂) 색경(穡經)에 표방된 현대 도시농업적 가치에 관한 연구 (A Study of the Value of Contemporary Urban Agriculture as Represented by the Saekgyeong(穡經) by Seogye Park Se-dang(西溪 朴世堂))

  • 임정언;성종상
    • 한국전통조경학회지
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    • 제33권1호
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    • pp.76-87
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    • 2015
  • 본 연구는 조선시대의 농서 색경(穡經-농업에 관한 경서, 1676)과 이를 저술한 학자 서계 박세당(西溪 朴世堂)의 농업사상에 주목하였다. 연구목적은 당시의 농업에 대한 태도와 가치, 땅을 다루고 활용하는 방식 등에 관한 내용을 토대로 현대 도시농업의 가치를 고찰하는 것에 있다. 박세당의 농업사상과 색경을 통해 확인한 연구결과는 다음과 같다. 첫째, 생산성 향상을 통해 생계가 어려운 소농민의 안정을 추구하고 자립성을 실현하고자 하였던 사회 경제적 가치이다. 둘째, 경험에 의한 탐구, 강학(講學)을 위한 농업실습 현장으로서의 체험적 가치이다. 셋째, 자연의 흐름과 현상을 읽어 땅에 순응하는 농업방식으로 척박한 자연환경을 극복하고자 하였던 환경적 가치이다. 넷째, 땅에 적합한 농업방법과 생활의 지혜를 담은 지침서로서 색경을 편찬하여 널리 공유하고자 했던 활용적 가치이다. 위의 네 가지 가치 측면에서 현대 도시농업의 가치를 고찰해보면 다음과 같다. 사회 소외계층의 복지 수단으로 도시농업 활동을 장려하고 일자리 창출을 도모하는 사회 경제적 효과, 교육적 측면에서 체험활동을 통한 강학의 의미 제고, 자원순환과 재생 그리고 도시 생태성 회복을 위해 갖추어야 할 환경인식 증진, 학문연구와 대중에게 친숙한 접근방식으로 생활의 지혜를 공유하고 사회에 기여하는 실천적 정신이다. 본 연구는 최근 다양하게 논의되고 있는 도시농업의 가치를 과거 농업에 대해 고민한 선조들의 생각에서 찾아보고자 하였다. 비록 시대적 배경의 차이가 있으나 우리가 추구하고 있는 다양한 농업적 가치에 대한 근본적인 의미를 되새겨보았다는 것에 연구의 의의가 있다.

남부지역 논의 밀 이모작에서 하계 곡실작물 도입의 적합성 (Compatibility of Double Cropping of Winter Wheat - Summer Grain Crops in Paddy Field of Southern Korea)

  • 서종호;황정동;오성환
    • 한국작물학회지
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    • 제66권1호
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    • pp.18-28
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    • 2021
  • 남부지역 논에서 식량작물을 최대로 생산하기 위해 밀양시 국립식량과학원 시험포장에서 2015~2018년의 4년 동안 겨울밀-벼, 겨울밀-콩 및 겨울밀-곡실용옥수수의 이모작 체계의 생육기간 및 생산성을 비교하였다. 밀의 수확적기는 6월 중순으로 하작물은 6월 하순에 파종(이앙)이 가능하였다. 벼의 6월 하순 이앙 시 안전출수와 벼의 수량성 확보에는 지장이 없었지만 가을에 성숙기가 늦어 뒷그루 밀 파종에는 지장이 많았으며, 특히 중만생종 벼의 경우 수확기가 11월 상순으로 늦추어져 밀의 적기파종이 어려웠다. 콩은 6월 하순이 파종적기이므로 작기상 큰 문제가 없었으며 성숙기도 10월 중순으로 11월 상순의밀 파종에 큰 무리가 없었다. 곡실용옥수수는 6월 하순 파종 시 성숙기가 가장 빨라 밀과의 이모작에서 작기상 가장 유리하였다. 겨울밀-하작물 이모작에서 밀은 콩과 곡실용옥수수 후작에서는 안정적인 수량성을 얻을 수 있었지만 벼의 후작에서는 강우가 많은 해에는 수량이 감소할 위험성이 있었다. 벼, 콩, 곡실용옥수수의 수량성은 각각 600, 350, 800 kg/10a로 높은 수량성 확보가 가능하였고 중생종과 중만생종간의 수량성에 큰 차이를 보이지 않아 중생종이 만생종보다 이모작에 유리하였다. 토양 물리성에서도 콩과 옥수수 등 밭작물의 도입 시 물리성이 좋아지는 것으로 나타났다. 따라서 남부지역 논에서 밀-콩/곡실용옥수수 이모작은 작기 연결성 및 토양개선, 소득성(콩)에서 밀-벼 이모작보다 우수한 것으로 나타났다.

보건소의 환경, 조직구조와 조직유효성과의 관계 (A Study on Relationships Between Environment, Organizational Structure, and Organizational Effectiveness of Public Health Centers in Korea)

  • 윤순녕
    • 지역사회간호학회지
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    • 제6권1호
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    • pp.5-33
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    • 1995
  • The objective of the study are two-fold: one is to explore the relationship between environment, organizational structure, and organizational effectiveness of public health centers in Korea, and the other is to examine the validity of contingency theory for improving the organizational structure of public health care agencies, with special emphasis on public health nursing administration. Accordingly, the conceptual model of the study consisted of three different concepts: environment, organizational structure, and organizational effectiveness, which were built up from the contingency theory. Data were collected during the period from 1st of May through 30th of June, 1990. From the total of 249 health centers in the country, one hundred and five centers were sampled non proportionally, according to the geopolitical distribution. Out of 105, 73 health centers responded to mailed questionnaire. The health centers were the unit of the study, and a various statistical analysis techniques were used: Reliability analysis(Cronbach's Alpha) for 4 measurement tools; Shapiro-Wilk statistic for normality test of measured scores of 6 variables: ANOVA, Pearson Correlaion analysis, regressional analysis, and canonical correlation analysis for the test of the relationships and differences between the variables. The results were. as follows : 1. No significant differences between forma lization, decision-making authority and environmental complexity were found(F=1.383, P=.24 ; F=.801, P=.37). 2. Negative relationships between formalization and decision-making authority for both urban and rural health centers were found(r=-.470, P=.002 ; r=-.348, P=.46). 3. No significant relationship between formalization and job satisfaction for both urban and rural health centers were found (r=-.242, P=.132, r=-.060, P=.739). 4. Significant positive relationship between decision - making authority and job satisfaction were found in urban health centers (r=.504, P=.0009), but no such relationship was observed in rural health centers. Regression coefficient between them was statistically significant($\beta=1.535$, P=.0002), and accuracy of regression line was accepted (W=.975, P= .420). 5. No significant relationships among formalization and family planning services, maternal health services, and tuberculosis control services for both urban and rural health centers were found. 6. Among decision-making authority and family planning services, maternal health services, and tuberculosis control services, significant positive relationship was found between de cision-making authority and family planning services(r=.286, P=.73). 7. A significant difference was found in maternal health services by the type of health centers (F=5.13, P=.026) but no difference was found in tuberculosis control services by the type of health centers, formalization, and decision-making authority. 8. A significant positive relationships were found between family planning services and maternal health services and tuberculosis control services, and between maternal health services and tuberculosis control services (r=-.499, P=.001 ; r=.457, P=.004 ; r=.495, P=.002) in case of urban health centers. In case of rural health centers, relationships between family planning services and tuberculosis control services, and between maternal health services and tuberculosis control services were statistically significant (r=.534, P=.002 ; r=.389, P=.027). No significant relationship was found between family planning and maternal health services. 9. A significant positive canonical correlation was found between the group of independent variables consisted of formalization and de cision-making authority and the group of dependent variables consisted of family planning services, maternal health services and tuberculosis control services(Rc=.455, P=.02). In case of urban health centers, no significant canonical correlation was found between them, but significant canoncial correlation was found in rural health centers(Rc=.578, P=.069), 10. Relationships between job satisfaction and health care productivity was not found significant. Through these results, the assumed relationship between environment and organizational structure was not supported in health centers. Therefore, the relationship between the organizational effectiveness and the congruence between environment and organizational structure that contingency theory proposes to exist was not able to be tested. However decision-making authority was found as an important variable of organizational structure affecting family planning services and job satisfaction in urban health centers. Thus it was suggested that decentralized decision making among health professionals would be a valuable strategy for improvement of organizational effectiveness in public health centers. It is also recommended that further studies to test contingency theory would use variability and uncertainty to define environment of public health centers instead of complexity.

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2단 베드 시스템의 하단부에서 자란 딸기의 생산성 및 과일 품질에 미치는 보광 LED의 효과 (Effects of Supplemental LED Lighting on Productivity and Fruit Quality of Strawberry (Fragaria × ananassa Duch.) Grown on the Bottom Bed of the Two-Bed Bench System)

  • 최효길;정호정;최경이;최수현;채수천;안승원;강희경;강남준
    • 생물환경조절학회지
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    • 제27권3호
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    • pp.199-205
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    • 2018
  • 본 연구의 목적은 2단 베드 벤치 시스템에서 딸기를 재배하는 동안 상단베드에 의한 차광으로 광량 부족한 하단 베드에서 자란 딸기의 생산량 및 과일 품질에 LED 보광의 영향을 확인하기 위한 것이다. 딸기 전용상토로 충진된 2단 베드 벤치에 2015년 10월부터 2016년 1월까지 점적 관수로 딸기를 재배하였다. LED 광이 처리되지 않은 상단과 하단 베드를 대조구로 이용하였고, LED 광 처리를 위해서 오전 10시부터 오후 4시까지 하단 베드에 각각 청색, 적색, 그리고 청색과 적색을 혼합한 LED 광을 $100{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$의 광량으로 보광 하였다. 딸기의 수확량에 있어서, 하단 베드의 청색 LED 보광된 처리에서 자란 딸기는 하단 부분 대조구와 비교하여 유의하게 증가되었으며, 상단 베드 대조구에서 자란 딸기 생산량의 90% 수준까지 증가되었다. 청색 및 혼합 LED와 상단베드에서 생육된 딸기 과일의 유리당 함량은 적색 LED와 하단 베드 부위 대조구에 비하여 높았다. 안토시아닌의 함량은 자연 광을 많이 받는 상단 베드에서 생육된 딸기 과일이 가장 높았지만, 하단베드 처리만을 비교하할 때, LED를 보광한 모든 딸기과일이 보광하지 않은 하단 부분의 대구조의 딸기 과일보다 높았다. 따라서 딸기 2단 베드 재배 시 하단 베드에 청색 LED 보광이 생산 증대 및 품질 향상에 유리할 것으로 판단된다.

모니터링 기능에 대한 인식이 효과적인 BPMS 도입에 미치는 영향 (An Empirical Study on the Impact of the Perception of the Monitoring Function on Effective BPMS Adoption)

  • 채명신;박진석;이병태
    • Asia pacific journal of information systems
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    • 제17권3호
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    • pp.105-130
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    • 2007
  • Recently, there is a substantial interest in implementing Business Process Management System(BPMS) among enterprises with the purpose of business process innovation. BPMS redesigns and coordinates business processes in terms of both automated steps and human involvement in order to maximize the value of both involved people and systems. The reason why BPMS is getting attention from top managers is that it has the possibility to optimize the business processes by cycling the process of modeling, execution, monitoring, evaluation, and redesigning work processes. Thus, it has created high expectations about not only productivity improvement but also business process innovation. However. having an innovative nature, which is used for process innovation, BPMS implementation has great potential to stir up employee resistance. The analysis and the discussion about the prevention of the resistance against IS(Information Systems) is important because IS change the way people work and also alter the power structure within the organization, in general. The purpose of this study is to investigate factors that have an impact on the effective adoption of BPMS at the enterprise level. To find out these factors, this study considers two characteristics of BPMS: First. BPMS shares some characteristics with other enterprise-wide IS such as ERP. Second, it has special BPMS-specific characteristics. Due to the lack of previous research on BPMS adoption, interviews were carried out with IT-consultants and CIOs who conducted BPMS projects previously to find out BPMS-specific features that would make BPMS unique when compared to other enterprise-wide IS. As a result, the monitoring function was chosen as the main BPMS-specific factor. Thus, this paper reviewed studies both on enterprise-wide IS adoptions, which applied Technology Acceptance Model (TAM) and secondly on computer based monitoring to find out factors that would influence the employees' perception on the monitoring function of BPMS. Based on the literature review, the study suggested three factors that would have an impact on the employee's perception of the monitoring function: fairness of enterprise evaluation system, fairness of the boss, and self-efficacy of their work. Three factors that would impact the enterprise-wide IS adoption were also set: the shared belief in the benefit of BPMS, training, and communication. Then, these factors were integrated with TAM. Structural equation modeling was used to test hypotheses, out factors that would impact the employees' perception on the monitoring function of BPMS. Based on the literature review the study suggested three factors that would have an impact on the employee's perception of the monitoring function: fairness of enterprise evaluation system, fairness of the boss, and self-efficacy of their work. Three factors that would impact the enterprise-wide IS adoption were also set: the shared belief in the benefit of BPMS, training, and communication. Then, these factors were integrated with TAM. Structural equation modeling was used to test hypotheses. The data analysis results showed that two among three monitoring function related factors - enterprise evaluation system and fairness of the boss - were significant. This implies that employees would worry less about the BPMS implementation as long as they perceive the monitoring results will be used fairly for their performance evaluation. However, employees' high self-efficacy on their job was not a significant factor in their perception of the usefulness of BPMS. This is related to cases that showed employees resisted against the information systems because they automated their works (Markus, 1983). One specific case was an electronic company, where the accounting department workers were requested to redefine their job because their working processes were automated due to BPMS implementation.

신규대졸자의 취업 및 임금수준 결정요인 분석 (An Analysis of the Determinants of Employment and Wage of New College Graduates)

  • 채구묵
    • 한국사회복지학
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    • 제59권4호
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    • pp.35-61
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    • 2007
  • 본 연구는 중앙고용정보원의 청년패널 자료(2003-2005)를 이용하여 신규대졸자의 취업 및 임금수준에 영향을 미치는 요인을 분석해 본 후, 신규대졸자 실업완화 및 임금격차 해소에 도움이 될 수 있는 방안을 탐색해보았다. 분석결과, 첫째 취업여부 결정요인의 경우 학교소재지에서 경기 인천지역, 학교성적이 좋을수록, 취득자격증의 전공 및 취업관련 정도가 높을수록 취업가능성을 높이도록, 학교군에서 비수도권 사립대는 취업가능성을 낮추도록 영향을 미치는 것으로 나타났다. 둘째 취업형태 분석결과 (1) 정규직 결정요인의 경우 학교소재지에서 경기 인천지역, 학교성적이 좋을수록, 취득자격증의 전공 및 취업관련 정도가 높을수록, 의약간호보건계열 사범계열은 취업가능성을 높이도록, 학교군에서 비수도권 사립대, 수도권 전문대, 비수도권 전문대는 취업가능성을 낮추도록 영향을 미치며, (2) 비정규직 결정요인의 경우 학력에서 전문대, 학교군에서 수도권 전문대, 비수도권 전문대는 취업가능성을 높이도록, 비수도권 사립대는 취업가능성을 낮추도록 영향을 미치는 것으로 나타났다. 셋째 임금수준 결정요인의 경우 남자가, 연령이 많을수록, 의약간호보건계열, 사범계열은 임금수준을 높이도록, 비정규직, 학교소재에서 경기 인천지역, 전라지역은 임금수준을 낮추도록 영향을 미치는 것으로 나타났다. 신규대졸자 실업완화 및 임금격차 해소를 위한 시사점으로는, 첫째 대학교육을 전문인력 양성 및 산업현장의 요구에 부응하도록 개선해야 하고, 둘째 노동시장에서 성차별을 완화할 수 있는 대안이 마련되어야 되어야 하며, 셋째 자격증이 실질적으로 업무수행능력 및 생산성 향상과 연결될 수 있도록 자격증 취득과정을 개선해야 하고, 넷째 산업의 지방분산을 통한 지역균형발전정책이 이루어져야 하며, 다섯째 신규대졸자 취업을 촉진하기 위한 체계적 종합적인 지원 프로그램이 마련되어야 한다.

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한우(韓牛)의 유전적(遺傳的) 개량량(改良量) 증대(增大)를 위한 적정(適正) 산출(算出)에 관(關)한 연구(硏究) (The Optimum Breeding Structure to Increase Genetic Gain in Body Weight of Korean Native Cattle)

  • 박항균;최광수;설동섭
    • Current Research on Agriculture and Life Sciences
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    • 제1권
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    • pp.179-188
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    • 1983
  • 본(本) 연구(硏究)는 한우육용화(韓牛肉用化) 개량(改良)에 있어서 가장 중요한 경제형질(經濟形質)인 체중에 대(對)한 유전적개량량(遺傳的改良量)을 최대(最大)로 증대(增大)시킬 수 있는 적정규모(適正規模)를 산출(産出)하여 한우(韓牛)의 육용능력(肉用能力)을 조기(早期)에 효율적(效率的)으로 개량(改良)할 수 있는 방안(方案)을 제시(提示)하기 위하여 수행되었다. 체중에 대(對)한 유전적개량량(遺傳的改良量)과 세대별(世代別) 체중평균치의 변화(變化)를 추정(推定)하기 위하여 2재(才)이상의 암소잡균(雜菌)은 매세대(每世代) 675,000두(頭)가 유지(維持)되고 또한 암소는 매년(每年) 15%가 도태(淘汰)된다는 등(等) 몇가지 반정(飯定)아래서 다음과 같은 요인(要因)이 고려(考慮)되었다. 1) 암소 집단중(集團中) 인공수정(人工授精)되는 비율(比率); 30, 40, 50, 60, 70% 2) 종모우(種牡牛) 두당, 년간(年間) 정액(精液) 생산(生産) 수량(數量); 5,000, 7,000, 10,000, 15,000, 20,000두분(頭分) 3) 종모우(種牡牛)의 평균체중; 480, 520, 560, 600, 640, 680, 720kg/18개월령(個月齡)이다. 본연구(本硏究)에서 얻어진 결과(結果)를 요약(要約)하면 다음과 같다. 1) 체중의 유전적개량량(遺傳的改良量)은 이용(利用)되는 종모우(種牡牛)의 체중에 크게 영향(影響)을 받으며 매세대당유전적개량량은 28.66~36.31kg으로 추정(推定)되었다. 2) 유전적개량량(遺傳的改良量)의 80~90%는 종모우선발(種牡牛選拔)에 기인(起因)하는 것으로 나타났다. 3) 종모우(種牡牛)의 평균체중이 매세대(每世代)마다 40kg씩 증가(增加)되고 암소의 인공수정(人工授精)되는 비율(比率)이 50%이상으로 확대(擴大)되어지는 경우 5세대(世代)이후에서 수소 및 암소의 체중평균치는 인공수정집단(人工授精集團)에서는 600kg과 520kg, 그리고 전(全) 모집단(母集團)에 있어서는 560kg과 480kg에 도달될 것으로 추정(推定)되었다.

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Evaluation of lines of NERICA 1 introgressed with Gn1a and WFP for yield and yield components as affected by nitrogen fertilization in Kenya

  • Makihara, Daigo;Samejima, Hiroaki;Kikuta, Mayumi;Kimani, John M.;Ashikari, Motoyuki;Angeles-Shim, Rosalyn;Sunohara, Hidehiko;Jena, Kshirod K.;Yamauchi, Akira;Doi, Kazuyuki
    • 한국작물학회:학술대회논문집
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    • 한국작물학회 2017년도 9th Asian Crop Science Association conference
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    • pp.323-323
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    • 2017
  • In many sub-Saharan African countries, boosting rice production is a pressing food security issue. To contribute to the increase in rice production, we have developed lines of NERICA 1 introgressed with the gene for spikelet number, Gn1a, and the gene for primary rachis-branch number, WFP by cross breeding. The performance of rice lines introgressed with the genes for yield related traits can be affected by cultivation environment and management. Thus, in this study, we aimed to evaluate the lines of NERICA 1 introgressed with Gn1a or/and WFP for yield and yield components under different nitrogen fertilization conditions in Kenya. A field trial was conducted at a paddy field in Kenya Agricultural and Livestock Research Organization-Mwea, Kirinyaga County ($0^{\circ}39^{\prime}S$, $0^{\circ}20^{\prime}E$) from August 2016 to January 2017. Eight lines of NERICA 1 introgressed with Gn1a and/or WFP, and their parents, NERICA 1 and ST12, were grown under 0 (NF) and $75(SF)kg\;N\;ha^{-1}$. At maturity, five hills per plot were harvested to determine the yield and yield components. The number of primary and secondary rachis-branches per panicle was measured on the longest panicle in each hill. Under SF, the introgression of WFP to NERICA 1 increased the number of primary and secondary rachis-branches by 27 and 25%, respectively. On the other hand, Gn1a did not increase the number of primary rachis-branches, whereas the number of secondary rachis-branches was increased by 38% on average. The number of primary and secondary rachis-branches of the lines introgressed with both genes increased by 25 and 56%, respectively. Although grain number per panicle increased 33% by Gn1a, 34% by WFP, and 43% by Gn1a+WFP, the yield increase by Gn1a, WFP, and Gn1a+WFP was only 14, 7, and 14%, respectively. The suppression of the yield increase was mainly attributed to the decline in the filled grain ratio. Under NF, WFP increased the number of primary and secondary rachis-branches by 20 and 19%, respectively. The introgression of both genes increased the former and the later by 19 and 35%, respectively. However, Gn1a did not change them under NF. Thus, even under NF, grain yield increased 11% by WFP and 24% by Gn1a+WFP due to the increased grain number although filled grain ratio declined. Our findings suggest that the introgression of Gn1a and WFP could contribute to the rice productivity improvement in sub-Saharan Africa even under low fertility conditions. Improving filled grain ratio of the lines introgressed with these genes by further breeding and fertilization management will be the focus of subsequent work.

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