• International Journal of Industrial Entomology and Biomaterials
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• 제37권2호
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• pp.69-72
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• 2018

A new silkworm variety 'Chilseongjam' was bred for special purpose as educational learning and festivals. Their breeding history and major characteristics are as follows. The Chilseongjam variety was selected and succeeded from the F1 of Galwon ${\times}$ C721 in 2009 autumn. They are showing 94% (spring & autumn) of high practical hatching ratio. The larval period of Chilseongjam (spring: 23 d, autumn: 24 d 3 h) was shorter than that of Daebakjam (spring: 24 d, autumn: 25 d 23 h). In the pupation percentage, Chilseongjam (spring: 96.6%, autumn: 86.1%) is similar to Daebakjam Daebakjam (spring: 96.3%) in spring, but autumn is lower than Daebakjam (autumn: 94.9%). Single cocoon weight (spring: 1.57 g, autumn: 1.29 g) and Cocoon yield (spring: 14.2 kg, autumn: 11.1 kg) were lower than those of Daebakjam (spring: 2.76 g, 25.4 kg, autumn: 2.19g, 20.2 kg), respectively. The new silkworm variety, Chilseongjam showed higher pupation rate than control variety. This variety can be used as a educational learning and festivals.

• 한국잠사곤충학회지
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• 제13권2호
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• pp.145-150
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• 1971

년간 다회육에 적합한 사육시기를 알고자, 1968∼1970년에 걸쳐 잠업시험장(수원)외에 충남(공주), 경북(상주) 및 전남잠종장(장성)과 연락시험으로 실시한 연중 11기 사육시험 결과에서 1. 잠작의 일반적 경향은 춘잠은 소잠이 빠를수록 양호하였으며 추기에는 초추잠(6기)이 가장 불량하였고 추잠은 관행 소잠시기를 정점으로 하여 그 시기로부터 빠르거나 늦어질수록 점차로 불량하나 빠를수록 급격하게 불량하다. 2. 우리나라의 잠기별 잠작은 춘(1∼4기), 추(7∼10기), 만추(11기), 하(5기), 초추잠(6기)순으로 불량하였다. 만추잠 소잠시기는 남부지방이 중부지방보다 6∼7일 정도 늦을 수 있다. 3. 잠작면을 주로한 다회육의 소잠적기는 4회보통육은 춘기2회, 추기2회로 하되 춘기는 당해 지방 관행 춘잠기를 중심으로 3∼4일 정도 앞당기거나 5일정도 늦춘 2회육(1, 3기) 추기는 2∼5일 앞당기고, 3∼6일 늦춘 2회육(8, 10기)이 유리하다. 4회조상육은 춘기 2회(1, 3기)는 전기 보통육에서와 같고 추기2회육에서는 당해지방의 관행 추잠(9기)과 만추잠(11기)으로 하는 것이 유리하다.

• 한국초지조사료학회지
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• 제20권4호
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• pp.243-250
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• 2000

Selection of oat variety according to cultivation period is an important to increase productivity of forage crop. To investigate the growth characters and dry matter productivity of oats according to cultivation period, early-maturing oat(EM0) and medium-maturing oat(MM0) variety were sown in spring and autumn at central district of Korea. When oats were cultivated in spring, MMO variety was longer 8 cm in leaf length and wider 5 mm in leaf width than 25 cm and 12 mm of EM0 variety, rexpectively. but in autumn, those were not different between maturities of oat varieties. Plant length of MMO variety was longer 7 cm than that of EM0 Variety in spring cultivation, but in autumn, plant length of EM0 variety was longer 14 cm than that of MMO variety. Heading dates were 20th to 22th May in EM0 variety, and 30th May to 10th June in MMO variety in spring cultivation, and ear of EM0 variety emerged 30th Oct. to loth Nov. but that of MMO variety did not emerge at harvesting day in autumn cultivation. In Spring cultivation, dry matter(DM) yield of EM0 variety was 7,349 kg/ha that was less 56% than 11,466 kg/ha of MMO variety, but In Autumn, was more 15% than 6,575 kg/ha of MMO variety. In conclusion, selection of oat variety in spring and autumn cultivation can be different with cropping system of forage crop, and this trial is suggesting that oat variety could be sown MMO variety in spring and EM0 variety in autumn at central district of Korea. (Key words : Oat variety, Productivity, Cultivation season)

• 한국자원식물학회지
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• 제37권2호
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• pp.149-160
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• 2024

국내에서 감자는 주로 반찬이나 부식으로 이용해 왔지만 최근에는 칩이나 프렌치프라이 등 스낵이나 간식으로 이용이 증가하고 있다. 가공원료용 생감자를 사용하여 감자를 가공하는 것에 대한 수요는 높지만 감자를 2기작으로 특히 가을에 재배하였을때 가공품질이 어떻게 달라지는 지에 대한 연구는 부족한 실정이다. 따라서 본 연구는 봄감자 재배기간을 달리하여 가을감자를 재배하였을 때 생육과 수량 및 가공품질에 미치는 영향을 구명하고자 수행하였다. 봄감자 파종 후 수확을 70일, 80일, 90일, 100일 총 4번에 거쳐 하였으며, 이를 활용하여 각각 강릉과 서천 지역에서 가을재배를 수행하였다. 지상부 출현율은 봄감자 재배기간이 짧은 씨감자를 가을재배 했을 때 높아지는 경향이었다. 경장은 봄재배 기간이 80일 및 90일인 씨감자를 강릉 지역에서 가을재배했을 때 47.2~48.9로 다른 처리에 비해 컸다. 재배기간에 따른 경수와 엽색은 통계적 유의성이 없었다. 수확시기에 따라 괴경수, 괴경무게, 수량 및 상서수량은 통계적 유의성이 없었으며 품종에 따른 차이는 뚜렷하게 나타났다. 괴경 무게는 강릉에서는 새봉 품종이, 서천에서는 은선 품종이 우수하였다. 전분 함량은 봄에 80일간 재배한 씨감자를 강릉 지역에서 가을재배 했을 때 7.9%로 함량이 높았으며, 서천 지역에서는 유의성이 나타나지 않았다. Glucose 함량은 재배기간에 따라 뚜렷한 차이를 보였는데, 봄감자 재배기간이 긴 씨감자를 가을재배에 이용할 경우 그 함량이 높아졌다. 감자를 2기작으로 재배 시 봄감자 재배기간이 괴경의 생육, 수량 및 가공품질에 미치는 영향에 대해 연구한 결과, 재배기간에 따른 차이는 크지 않았고, 품종에 따른 차이가 뚜렷하였다. 은선 품종은 가을재배 시 지상부 생육 및 수량이 뛰어났고, 가공품질은 새봉 품종이 우수하였다.

• Natural Product Sciences
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• 제25권1호
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• pp.1-10
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• 2019

The ginsenoside content was compared with wild simulated ginseng (Panax ginseng) collected every season at 11 wild simulated ginseng plantations in Korea. As a result, the total saponin of 7 years old wild simulated ginseng showed the highest content of 4.5% in spring sampling wild simulated ginseng, 2.0% in summer sampling wild simulated ginseng, 1.2% in winter sampling wild simulated ginseng and 1.0% in autumn sampling wild simulated ginseng. And also, the total saponin of 10 years old wild simulated ginseng showed the highest content of 3.9% in spring sampling wild simulated ginseng, summer sampling wild simulated ginseng (1.8%), winter sampling wild simulated ginseng (1.6%) and autumn sampling wild simulated ginseng (0.6%). Therefore, the total saponin of spring sampling wild simulated ginseng was about 4.5 - 6.5 times higher than that of autumn sampling wild simulated ginseng regardless of cultivation period.

• ALGAE
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• 제20권1호
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• pp.43-52
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• 2005

A study on the seasonal changes in the phytoplankton community was carried out in four aquaculture ponds of Bangladesh over a period of 16 months from August 2000 to November 2001. Out of 45 phytoplankton species identified, 30 belong to Cyanophyceae, 7 to Chlorophyceae, 5 to Bacillariophyceae and 3 to Euglenophyceae. The highest phytoplankton abundance was observed in spring followed by early autumn, summer, and the lowest was in winter. The annual succession of Cyanophyceae was characterized by spring and early autumn period dominated by Microcystis sp. Anabaena sp. and Planktolymbya sp. with Microcystis sp. as the main blue-green algae represented. Chlorophyceae was characterized by rainy season domination of Chlorella vulgaris, Pediastrum sp. and Scenedesmus denticulatus with maximum abundance of Chlorella vulgaris. Whereas Bacillariophyceae was dominant during the winter period. Navicula angusta and Cyclotella meneghiniana were the most frequently occurring species of Bacillariophyceae throughout the study period. Euglenophyceae was dominant in late autumn and Euglena sp. was the dominant species. The effect of various physicochemical water quality parameters on the seasonal distribution and succession of the above mentioned phytoplankton population as well as the interaction and eutrophication are discussed.

• 한국작물학회지
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• 제19권
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• pp.78-82
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• 1975

1. 재배시기이동에 따른 유채종자유에 따른 지방산조성은 지방산의 종류에 따라 함량이 높은 Erucic acid가 가장 큰 차이를 나타냈으며 함량이 적은 지방산의 변동은 적었다. 2. 추파재배한 유채종자가 춘파재배한 것보다 Erucic acid함량이 높은데 대해서 Oleic acid와 Linoleic acid함량은 반대로 낮었다. 이들 차이는 1%수준에서 유의차가 있었다. 3. 추파재배된 유채종자가 Erucic acid함량이 높았으며 이는 등숙기간의 적산온도가 낮고 강수량이 많은데 있다. 이들 기상조건과 Erucic acid간에는 높은 상관관계가 있었다. 4. 단쇄지방산인 Oleic acid와 Linoleic aci의 증감경향은 항상 정상관관계가 있으며 장쇄지방산인 Erucic acid와는 부의 상관관계에 있었다.

• Journal of Ginseng Research
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• 제28권4호
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• pp.165-172
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• 2004

Ginseng is traditionally cultivated worldwide in cold continental climates. It is now also being cultivated in maritime environments such as New Zealandis. This paper reports a number of growth and quality parameters for plants grown under those conditions over two growing seasons and the intervening winter dormant period. While shoot biomass peaked mid-summer, in contrast, root biomass peaked late autumn/early winter. Starch, sucrose, fructose, glucose and inositol were detected in the roots. Starch concentrations were highest in early autumn (mean 470 mg $g^{-1}$ dry weight) and lowest in mid spring (218 mg $g^{-1}$ dry weight). Sucrose concentrations were low during early summer until late autumn but increased rapidly with the onset of winter and peaked during mid spring (168 mg $g^{-1}$ dry weight). Fructose and glucose concentrations were similar and peaked in late spring (5.3 and 6.2 mg $g^{-1}$ dry weight). Inositol concentrations peaked in mid summer (1.7 mg $g^{-1}$ dry weight). Starch/sugar ratios were high during summer and autumn and low during winter and spring. Ginsenoside concentrations and profiles showed that the six major ginsenosides, Rgl, Re, Rb1, Rc, Rb2 and Rd, were present, but Rf was absent. Concentrations did not vary with sampling date. The most abundant ginsenosides were Re (15.9 to 17.5 mg $g^{-1}$ dry weight) and Rb1 (10.7 to 18.1 mg $g^{-1}$ dry weight). Combined, they accounted for < $75{\%}$ of total ginsenoside concentrations. Limited taste tests indicated that highest root quality occurred during late autumn, after the shoots had senesced. However, quality could not be related to plant chemistry.

• Fisheries and Aquatic Sciences
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• 제24권1호
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• pp.41-52
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• 2021

Data for fish species composition and the catch of fish species were obtained from the daily trading records for the period between April and December 2016 to 2018 at the set net fishing grounds in Yeosu Bay, Korea. The annual mean total catch was 195.8 tons, and the dominant species was the Spanish mackerel (Scomberomorus niphonius), which accounts for about 55 percent of the total catch. The catch increased in spring and autumn. Increase in spring is caused by not Spanish mackerel but other fish while the increase in autumn by Spanish mackerel. The distinct increase of the catch in summer, 2017 was due to the new recruitment of small-sized Spanish mackerel, which was probably to be from the fish population hatched in spring in the East China Sea. Our results showed a strong correlation between water temperature and catch fluctuation. The catch increases with the increase in water temperatures, and the periodic pattern of the water temperature and catch fluctuation is more consistent in the offshore waters, in which warm current flows, than in the coast waters.

• 수산해양기술연구
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• 제54권2호
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• pp.146-156
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• 2018

Acoustic surveys were conducted in the seas surround the South Korea (South Sea A, South Sea B (waters around the Jeju Island), West Sea and East Sea) in spring and autumn in 2016. First, the vertical and horizontal distributions of fisheries resources animals were examined. In most cases vertical acoustic biomass was high in surface water and mid-water layers other than South Sea A in autumn and West Sea. The highest vertical acoustic biomass showed at the depth of 70-80 m in the South Sea A in spring ($274.4m^2/nmi^2$) and the lowest one was 10-20 m in the West Sea in autumn ($0.4m^2/nmi^2$). With regard to the horizontal distributions of fisheries resources animals, in the South Sea A, the acoustic biomass was high in eastern and central part of the South Sea and the northeast of Jeju Island ($505.4-4099.1m^2/nmi^2$) in spring while it was high in eastern South Sea and the coastal water of Yeosu in autumn ($1046.9-2958.3m^2/nmi^2$). In the South Sea B, the acoustic biomass was occurred high in the southern and western seas of Jeju Island in spring ($201.0-1444.9m^2/nmi^2$) and in the southern of Jeju Island in autumn ($203.7-1440.9m^2/nmi^2$). On the other hand, the West Sea showed very low acoustic biomass in spring (average NASC of $1.1m^2/nmi^2$), yet high acoustic biomass in the vicinity of 37 N in autumn ($562.6-3764.2m^2/nmi^2$). The East Sea had high acoustic biomass in the coastal seas of Busan, Ulsan and Pohang in spring ($258.7{\sim}976.4m^2/nmi^2$) and of Goseong, Gangneung, Donghae, Pohang and Busan in autumn ($267.3-1196.3m^2/nmi^2$). During survey periods, fish schools were observed only in the South Sea A and the East Sea in spring and the West Sea in autumn. Fish schools in the South Sea A in spring were small size ($333.2{\pm}763.2m^2$) but had a strong $S_V$ ($-49.5{\pm}5.3dB$). In the East Sea, fish schools in spring had low $S_V$ ($-60.5{\pm}14.5dB$) yet had large sizes ($537.9{\pm}1111.5m^2$) and were distributed in the deep water depth ($83.5{\pm}33.5m$). Fish schools in the West Sea in autumn had strong $S_V$ ($-49.6{\pm}7.4dB$) and large sizes ($507.1{\pm}941.8m^2$). It was the first time for three seas surrounded South Korea to be conducted by acoustic surveys to understand the distribution and aggregation characteristics of fisheries resources animals. The results of this study would be beneficially used for planning a future survey combined acoustic method and mid-water trawling, particularly deciding a survey location, a time period, and a targeting water depth.