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답리작으로 호밀과 헤어리베치의 단, 혼파 재배 시 우분뇨 및 화학비료의 시용에 따른 생산성 평가
조익환(Ik-Hwan Jo),윤용범(Young-Bum Yun),박웅렬(Wung-Ryeol Park),황보순(Soon Hwangbo),이성훈(Sung-Hoon Lee),이주삼(Ju-Sam Lee) 한국초지조사료학회 2008 한국초지조사료학회지 Vol.28 No.4
본 실험에서는 답리작으로 호밀과 헤어리 베치를 단파 혹은 혼파 재배 시 화학비료와 가축분뇨의 시용에 따른 생산성과 사료가치를 평가하여 양질의 조사료 자원을 확보하고자 실시되었는데, 그 결과를 요약하면 다음과 같다. 답리작으로 호밀 단파구와 호밀 및 헤어리 베치 혼파구의 연 평균 건물과 가소화양분총량(TDN) 수량은 각각 ㏊ 당 7.2와 4.0ton 및 8.0과 4.4ton으로 헤어리 베치 단파구의 연 건물수량과 TDN 수량(4.5 및 2.7 ton/㏊) 보다 유의하게 높았다(p<0.05). 또한 호밀과 헤어리 베치의 혼파 재배구 (7.7%)가 조단백질 함량이 호밀 단파 구 보다 높았으며 TDN 함량과 RFV(각각 55.8과 79.4)도 높았다. 호밀재배 시 액상우분뇨를 100% 시용한 구에서는 연 건물수량과 TDN 수량이 ㏊ 당 각각 7.4과 4.1ton으로 인산과 칼리만 시비한 구(7.2와 3.9 ton/㏊)와 무비구(5.5와 3.1 ton/㏊) 보다 높았으며 화학비료 대비 연 건물수량과 TDN 수량이 각각 75.52와 78.97%의 수준을 나타내었다. 또한 TDN 함량과 RFV도 무비구와 액상우분뇨가 다른 처리구 보다 높게 나타났다. 호밀과 헤어리 베치 혼파재배 시 액상우분뇨를 100% 시용한 구에서는 ㏊ 당 각각 7.6과 4.5ton을 나타내어 질소, 인산 및 칼리 시비구 대비 연 건물수량과 TDN 수량이 79.50과 86.77%의 수준을 나타내었고 조단백질 함량은 액상우분뇨 시용구에서 8.5%로 다른 처리구 보다 유의하게 높았으며 (p<0.05), TDN 함량과 RFV도 각각 58.3%와 86으로 가장 높게 나타났다. 이상의 결과를 종합해 볼 때, 호밀의 단파보다는 헤어리 베치와의 혼파가 건물수량은 감소하지만 사료가치의 개선 및 영양수량의 증가를 초래하였으며 이와 더불어 화학비료 시비구 보다 액상우분뇨 시용으로 자원의 재활용, 조사료의 품질 개선 및 사료가치의 급감을 방지하여 수확시기 연장 등을 기대할 수 있었다. This study was carried out to evaluate the effect of application of cattle manure and chemical fertilizer on dry matter productivity and nutritive values of rye and hairy vetch according to two different sowing methods such as single or mixed-sowed cultivation. Dry matter and TDN yields for rye single culture, and rye and hairy vetch mixed culture were 7.2 and 4.0 ton/㏊, and 8.0 and 4.4 ton/㏊, respectively. They were significantly (p<0.05) higher than that (4.5 and 2.7 ton/㏊) of hairy vetch single culture. Moreover, plots produced by mixed-sowing cultivation had a higher crude protein (CP) as 7.7% than that of only rye plot, and higher TDN and RFV as 55.8 and 79.4%, respectively. Within rye alone plots, completely cattle slurry application produced significantly higher annual DM and TDN yields (7.4 and 4.1 ton/㏊) than those of P+K fertilization (7.2 and 3.9 ton/㏊) as a chemical fertilizer and non-fertilizer (5.5 and 3.1 ton/㏊). Cattle slurry application plot revealed 75.52 and 78.97% of N+P+K fertilization plot for annual DM and TDN, respectively. Within mixed-sowing cultivation with rye and hairy vetch, completely cattle slurry application produced 7.6 ton/㏊ DM and 4.5 ton/㏊ TDN, showing 79.50 and 86.77% of N+P+K fertilization plot, respectively. Furthermore, the CP content for cattle slurry plots was 8.5%, which was significantly (p<0.05) higher than those of other plots, and it was also highest in TDN (58.3%) and RFV (86). Overall, rye mixed-sowing with hairy vetch rather than rye alone sowing reduced DM yields, but leaded to enhancement of feed value and nutritive yields. And also, it would be expected that cattle slurry application in comparison with chemical fertilizers might result in reutilization of resources, improved forage quality and, extended harvest period by preventing feed value from rapidly deteriorating.
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확률론적인 신뢰도기준에 의한 적정설비예비율의 결정에 관한 연구
朴正濟(Jeong-Jae Park),崔在錫(Jae-Seok Choi),尹用範(Yong-Bum Yun),鄭永範(Young-Bum Jung) 대한전기학회 2008 전기학회논문지 Vol.57 No.8
This paper proposes an alternative methodology for deciding an optimum deterministic reliability level (IRR; Installed Reserve Rate) by using probabilistic reliability criterion (LOLE; Loss of Load Expectation). Additionally, case studies using the proposed method induce the characteristics of relationship between the probabilistic reliability index (LOLE) and deterministic reliability index (IRR) for 2008 and 2010 years in Korea power system. The case study presents a possibility that an optimum IRR level in Korea can be assessed using the proposed method. Korea power system has been using the LOLE criterion to determine the adequacy of installed capacity (ICAP) requirement. The criterion in Korea is that the loss of load expectation shall not exceed the available capacity more than five day in ten years (=0.5[days/year]). The probabilistic reliability evaluation and production cost simulation program which is called PRASim is used in order to evaluate the relationship and optimum IRR in this paper.
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간암의 크기와 혈청 Alpha - Fetoprotein 치 및 초음파 밀도와의 상호관계
송인성(In Sung Song),김정룡(Chung Yong Kim),이효석(Hyo Suk Lee),정영화(Young Hwa Chung),윤용범(Yong Bum Yun),정현채(Hyun Chae Jung),이진호(Jin Ho Lee),김용태(Yong Tae Kim) 대한소화기학회 1988 대한소화기학회지 Vol.20 No.3
N/A The patients with hepatocellular carcinoma (HCC) show a wide range of serum alpha-fetoprotein (AFP). The ultrasonographic (US) echogenicity of HCC is also variable. The determinant factors of serum AFP level and US echogenicity are unclear. There are still a lot of controversies on the adequate criteria of the earlier detection of HCC. This study was designed to reevaluate the relationship between the size of 75 HCCs and serum AFP and between the size and US echogenicity, and then to propose a more adequate detecton criteria for smaller HCCs which can still be resectable. The results were as following; 1) There was no significant correlation between the diameter of HCC (in cm) and the logrithmic values of serum AFP when all the HCC (n=75) were included. However, a closer correlation between the diameter and those of serum AFP when only 37 HCCs with serum AFP higher than 100 ng/ml were selected (r=0.53, p<0.01). 2) HCCs less than 4 cm in diameter were hypoechoic on US in 61%, while those, the size of which were between 4 cm and 8 cm and larger than 8 cm were hyperechoic in 78% and 92%, respectively (p < 0.01). 3) The echogenicity of HCC was significantly correlated with serum AFP level (p<0.05), but was not related to tumor location in the liver, HBsAg positivity, associated liver cirrhosis and pathological type of HCC (p>0.05). These findings suggested that when serum AFP is above 100 ng/ml, the increment of the size can be expected by the elevation of serum AFP and that there is a pitfall in the US detection of HCC; the HCCs with the diameter of around 4 cm which can be isoechoic. Therfore, we proposed that US be used in complement with follow-up serum AFP to detect smaller HCC.
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