• 한국초지조사료학회지
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• 제26권2호
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• pp.97-104
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• 2006

본 연구는 수확기에 따른 호밀 품종간의 사초생산능력을 구명하기 위하여 수행하였다. 시험구는 분할구 배치법으로 주구는 4월 20일과 4월 30일의 수확시기를, 세구는 'Kodiak', 'Koolgrazer', 'Danko', 'Homil22', 'Olhomil' 품종으로 하였다. 조기수확시의 건물 함량은 각각 17.8%로 만기수확시의 20.0% 보다 낮았으나, 조단백질 및 TDN 함량에 있어서는 만기수확시 보다 높았다. 공시품종 간에는 건물, 조단백질 및 TDN 함량에 있어서 유의적인 차이가 있었다. ADF, NDF, ADL 및 cellulose 함량은 조기수확이 만기수확시 보다 낮았으나, hemi-cellulose 함량은 조기수확이 만기수확시 보다 높았다. 공시품종 간에는 조생품종의 섬유소함량이 다른 품종에 비하여 높았다. 조기수확시의 건물, 조단백질, IVDDM 및 TDN 수량은 각각 7,839, 1,468, 6,077 및 5,128kg/ha로 만기 수확시의 11,003, 1,813, 8.032 및 6,857kg/ha 보다 낮았으며 공시품종 간에는 조생품종이 다른 품종에 비하여 높았다. 시험에서 얻어진 결론은 사초용 호밀의 수확시기를 고려할 때 수량과 사료가치를 높일 수 있는 방법은 조생호밀품종에 만기수확을 조합하는 사초생산기술에 의해서 가능하다는 것이다.

• 한국작물학회지
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• 제64권3호
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• pp.185-192
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• 2019

일평균온도 및 여름철 기온상승에 따라 추석 전 햅쌀 생산을 목적으로 재배하는 조생종의 경우 등숙기 온도 상승에 따른 품질저하의 우려가 증대하고 있다. 추석 전 햅쌀 생산시 수량 및 품질의 안정적 확보를 위한 육종효율을 증진하기 위해 주요 조생종 품종 및 유전자원 25점을 대상으로 이앙시기에 따른 출수기 및 등숙 온도에 따른 품질변화를 분석한 결과는 다음과 같다. 1. 전주에서 재배 시 이앙부터 출수기까지의 포장생육기간 변화를 분석한 결과, 이앙시기 10일 변화 시 약 3.3일, 출수 전까지 생육기 평균온도 $1^{\circ}C$ 변화에 따라 약 2.5일 가량 변동되었다. 2. 조운, 운광 및 운일찰은 이앙시기 및 생육기 평균온도에 따른 포장생육일수의 변동이 적어 생육량 확보가 안정적이나 이앙시기 지연 시 출수기가 늦어 등숙에는 불량한 것으로 나타났으며, 반면 Kittake, Jizi1581 및 Pecos의 경우 이앙시기 및 생육기 온도에 따른 포장생육일수의 변동이 큰 편으로 늦은 이앙 시 생육량은 적지만 출수 및 등숙에는 유리한 것으로 판단된다. 3. 전주지역의 기상을 바탕으로 볼 때 추석 전 안정적인 햅쌀 생산을 위해서는 5월 15일경 이앙하는 것이 알맞으나 백일미 및 Kittake의 경우 6월 5일까지 이앙시기가 늦어져도 수확이 가능한 것으로 나타났다. 4. 등숙기 평균온도 상승에 따라 현미 천립중은 약 0.2g, 현미 및 백미 완전립은 각각 약 5% 및 6.5%가 감소하였다. 조운 및 Pecos의 경우 현미품위 및 현미천립중 감소가 각 10% 및 4%로 적어 추석 전 햅쌀 생산을 목적으로 한 고품질 쌀 교배모본으로 사용 가능할 것으로 판단된다.

• 한국연초학회지
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• 제6권2호
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• pp.179-184
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• 1984

This experiment was carried out to select the suitable burley varieties for paddy field. Two varieties, two $F_1$ hybrids and three $F_1$ hybrids with pale yellow line which were all early maturing were tested in the paddy field condition. The results were as follows. 1. Va 528 and all $F_1$ hybrids flowered 4-8 days earlier than Burley 21. 2. Leaf maturity among varieties and $F_1$ hybrids were not significantly different at first priming, but significant differences were detected from second to forth primings. (MS Ky 12x JB 7802-30)Fl and (MS Br 21 x L8)$F_1$ hybrids matured 3-5 days earlier than Burley 21. Pale yellow hyorids matured early, yielded high and were favorable in physical properties, but were low in quality. 4. Va 528 and (MS Br 21 x L8) $F_1$ hybrid showed earthy maturing, high yield and good quality compared with Burley 21. So two varieties were considered suitable for paddy field cultivation.

• 한국가축번식학회지
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• 제13권3호
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• pp.127-133
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• 1989

This study was undertaken to understand development stage of ovary and changes of hormones concentration from February to May in the Israeli carp, Cyprinus carpio. The results obtained in these experiments are as follows ; 1. Serum LH levels began to increase sharphy in March, coinciding with the onset of rapid ovarian development. 2. LH levels were well correlated with changes in gonadosomatic index. 3. Dramatic increase in gonadosomatic index occurred during the months of March. 4. Ripe stage(Stage Ⅴ) rapidly increase in March. 5. Early perinucleolus oocyte radpily develop into late perinucleolus oocytes in March. 6. The vitellogenic phase begins as these late perinucleolus oocytes become transformed into early maturing oocytes through the accumulation of yolk. 7. The cytoplasm completely fills with yolk as oocytes reach the late maturing stage. 8. Changes in the microscopic appearances of the ovaries were well correlated with changes in both gonadosomatic index and macroscopic appearance. 9. It is concluded from these observations that LH plays a major role in sexual maturation of the Israeli carp.

• 미생물학회지
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• 제3권2호
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• pp.15-21
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• 1965

Using the synchronous culture method and the manometric technique, changes in respiratory activities, utilization of some organic acids (succinate, malate, lactate and acetate etc.) and its effect on glucose metabolism in Chlorella cells at different growing stages were measured. 1) Endogenous respiration of the cells was not active at growing stage and was almost constant throughout the early ripening, maturing and division stages. 2) Lactate was utilized as respiratory substrate better than other organic acids tested. Exogenous respiration of glucose was most active at growing and maturing stages and was decreased strikingly at division stage. 3) Succinate and citrate inhibited endogenous and glucose respiration of the cells throughout the all life cycle. 4) Malate and acetate were utilized in the cells at early growing and division stages better, and malate enhanced the glucose respiration while in case of acetate it was depressed. 5) Calcium ion inhibited not only permeability of respiratory substrate but endogenous respiration itself.

• Asian-Australasian Journal of Animal Sciences
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• 제18권2호
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• pp.259-266
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• 2005

Steers (n=335) of known genetic backgrounds from four fundamentally different growth types were subjected to two production systems to study differences in carcass traits. Growth types were animals with genetic potential for large mature weight-late maturing, intermediate mature weight-late maturing, intermediate mature weight-early maturing and small mature weight-early maturing. Each year, in a nine-year study, calves of each growth type were weaned and five steers of each growth type were developed on pasture or feedlot and slaughtered at approximately 20 and 14 months of age, respectively. Data collected were pre-slaughter shrunk body weight (SBW); hot carcass weight (HCW); dressing percentage (DRESS); fat thickness at the $12^{th}$ and $13^{th}$ rib interface (FAT); percentage kidney, pelvic, and heart fat (KPH); longissimus muscle area (LMA); marbling score (MARB); quality grade (QG); and yield grade (YG). Year and growth type were significant for all carcass traits. The growth type${\times}$production system interaction was an important source of variation in SBW, HCW; FAT, YG and MARB. The same interaction was non-significant for DRESS, KPH, LMA and QG. Carcass differences in measures of fatness were greater in the feedlot system than in the pasture system. These data could aid producers in matching beef growth type to the production system most suitable for efficient use of resources.

• Asian-Australasian Journal of Animal Sciences
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• 제20권11호
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• pp.1746-1753
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• 2007

Steers (n = 335) of known genetic background from four fundamentally different growth types were subjected to two production systems to study differences in cooking loss (CL), tenderness, and chemical composition. Growth types were animals with genetic potential for large mature weight-late maturing (LL), intermediate mature weight-late maturing (IL), intermediate mature weight -early maturing (IE), and small mature weight-early maturing (SE). Each year, in a nine-year study, calves of each growth type were weaned and five steers of each growth type were developed on pasture or feedlot and harvested at approximately 20 and 14 mo of age, respectively. Data collected were CL and Warner-Bratzler shear force (WBS) for the Longissimus dorsi (LM), Psoas major (PS), and Quadriceps femoris (QF) muscles. Chemical composition was also determined from the right fore- and hindquarter. Data were analyzed using least squares analysis of variance for unequal subclass numbers. The beef growth $type{\times}production$ system interaction was significant for CL and WBS of the LM and ash in the lean trim of the forequarter. Growth types of LL and IL had greater (p<0.05) mean percentage CL in the PS and QF muscles than did IE and SE steers. Growth type LL had the highest (p<0.05) mean for both moisture and protein in the fore- and hindquarters; while SE had the lowest numerical mean value for moisture and protein in the fore- and hindquarters. Shear force of the PS did not differ (p>0.05) among steers of the four growth types. Increasing challenges to the cattle feeding industry may dictate that pasture development play a larger role in future production regimes. Producers should strive to match genetic growth type with available resources in order to remain viable and continue producing a quality product.

• Preventive Nutrition and Food Science
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• 제20권1호
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• pp.8-14
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• 2015

Many studies on broccoli have analyzed the functional components and their functionality in terms of antioxidant and anticancer activities; however, these studies have focused on the florets of different varieties. Investigation of the functionality of broccoli by-products such as leaves, stems, and leaf stems from different cultivars and harvest dates might be valuable for utilizing waste materials as useful food components. Total phenolics and sulforaphane contents, and antioxidant and anticancer activities were measured in the leaves, leaf stems, and stems of early-maturing (Kyoyoshi), middle-maturing (Myeongil 96), and late-maturing broccoli (SK3-085) at different harvest dates. Total phenolics in the leaves of Kyoyoshi were about 1.8-fold to 12.1-fold higher than those in all of the other cultivars and parts. The sulforaphane content of Kyoyoshi was 2.8-fold higher in the stems than in the florets. Antioxidant activities using 2,2-diphenyl-1-picrylhydrazyl radical scavenging activity and oxygen radical absorbance capacity were highest in Kyoyoshi, followed by Myeongil 96 and SK3-085, most notably in the leaves harvested at the immature stage. Inhibition activity of cell growth against the NCI-H1299 cell lines was highest in the leaves of all cultivars in decreasing order of florets, leaf stems, and stems. The leaves harvested in October (nonflowering stage) had the highest inhibition activity, while those harvested in January (mature broccoli) showed the lowest. The results of this study demonstrate that broccoli leaves and stems contain high levels of total phenolics, and high antioxidant and anticancer activities and can provide opportunities for early-maturing broccoli as functional fresh raw vegetables.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.325-325
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• 2022

In order to developing high-quality rice varieties and processing varieties, systematic and stable evaluation of physicochemical properties is required for breeding lines. In this study, we compared the quality characteristics evaluation results of rice breeding lines for cooked rice, special rice, and whole crop silage rice adapted to central plain region (Suwon) in order to use as basic data for future rice variety development. Brown rice length/width ratio, head rice ratio, protein content, amylose content, alkali digestion value(ADV) and Toyo value were analyzed to evaluate the quality characteristics of yield trial lines cultivated in Suwon for four years (2017-2020). Brown rice length/width ratio, head rice ratio, protein content, ADV and Toyo values showed significant differences by year, but there was no significant difference in amylose content (p<0.05), which showed little environmental variation. The head rice ratio and Toyo value showed an increasing trend, while the protein content showed a decreasing trend. However, the protein content was the highest in 2020, which is thought to be owing to little sunlight hours due to heavy rainfall in 2020. The protein content of whole crop silage rice was 8.1%, which was significantly higher than that of other lines (p<0.05). Toyo value of medium-maturing and early-maturing lines were 67.6 and 73.7%, respectively, and the Toyo value of medium-maturing lines was higher than that of the early-maturing lines (p<0.05). In correlation analysis among the quality characteristics of the rice lines for cooked rice, significant positive correlations were detected between Toyo value and head rice ratio, amylose content, ADV, and a negative correlation was observed between Toyo value and protein content (p<0.05).

• 한국작물학회지
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• 제47권6호
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• pp.395-401
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• 2002

보리의 조숙 품종을 육성하기 위해서는 조기 출수인자에 단기 등숙성 인자를 도입하는 것이 중요하므로 출수기, 성숙기 및 등숙기간의 유전에 관한 정보를 얻고자 4개 품종(사천6호, 오월보리, 동보리1호, Reno), F$_1$, F$_2$세대의 종자를 포장에 파종, 재배하여 출수기, 성숙기 및 등숙기간을 조사하였다. 1. 출수기는 4월 3일-4월 26일, 성숙기는 5월 15일-5월 27일, 등숙기간은 31일-42일로 교배친 및 F$_1$ 조합간 차이가 현저하였다. 2. 부분 이면교잡에 의한 분산분석 결과, 출수기에 대해서 동보리1호(출수기 늦음)는 우성으로, 오월보리는(출수기 빠름) 열성으로, 출수기 유전은 유전자의 상가적 작용이 큰 부분우성으로 나타났다. 3. 성숙기에 대해서 동보리 1호가 우성으로, 오월보리가 열성으로, 성숙기 유전은 유전자의 상가적 작용 큰 부분우성으로 나타났다. 4. 등숙기간에 대해서 Reno(등숙기간이 짧음)가 우성으로 오월보리(등숙기간이 길음)은 열성으로 유전자의 상가적 작용이 큰 부분우성으로 나타났다. 5. 출수기, 성숙기에 대한 일반조합능력의 분산량은 고도의 유의성이 인정되고, GCA분산이 SCA분산보다 출수기는 10.1-29.5배, 성숙기는 9.9-121배 높아서 유전자의 상가적 작용이 컸으며, 사천6호와 오월보리는 출수와 성숙이 빠른 방향으로, 동보리 1호와 Reno은 늦어지는 방향으로 효과를 보였다. 6. 등숙기간에 대해선 GCA 효과는 F$_1$과 F$_2$ 세대간 유의적 차이가 있었고 GCA/SCA비가 크므로 유전자의 상가적 작용이 현저하였다. 7 포장 출수기, 성숙기는 결빙방지 단백질의 농도, 광합성의 광저해에 대한 내성, 포장 내동성과 고도의 정의 상관을, 등숙기간은 각 형질들과 부의 상관을 보였다. was "glossy and smooth" in all cases and preference about the texture was high. The Doenjang with added P. japonica Powder had a saltier taste and the Doenjang with P. japonica Powder had the least sweet taste. In the flavor and overall Preference, the Doenjang with P. japonica powder was the lowestEX>로 측정되었고, 계사내 지붕의 표면 온도는 최고 $29^{\circ}C$가 측정되었다. 계사 내 표면 온도 및 닭의 표면 온도는 계사내 공기온도의 영향을 많이 받는 것으로 나타났다.ill in a good agreement with those predicted by Rohsenow's formula, which was based on nucleate boiling. For the condenser, the wall temperatures were practically uniform, and the measured values of condensation heat transfer coefficient were 1.7 times higher than the predicted values obtained from Nusselt's film condensation theory on tilted plate. Using those two expressions, a correlation was formulated as a function of heat flux and tilt angle, to determine the total thermal resistance of a tilted thermosyphon.