• 한국작물학회지
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• 제47권5호
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• pp.335-340
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• 2002

To evaluate the efficiency of anther floating culture according to the maturing group, the varietal difference and classification of fifty varieties was conducted in N6 liquid medium containing 1mg $l^{-1}$ NAA, 0.25 mg $l^{-1}$ kinetin. The efficiency of callus induction was widely ranged from 0 to 113.4%, but the mean callus induction was not significantly different among maturing groups. The efficiency of anther floating culture showed the highest variation in early-maturing group among three maturing groups. The varieties with the best callus induction were Sambaegbyeo and Jinbuolbyeo, while the recalcitrant variety was Obongbyeo in early-maturing group. The efficiency of plant regeneration showed the highest trends in late-maturing group among three maturing groups. The fifty varieties were classified into three groups (distance=0.78) by cluster analysis based on the callus formation and plant regeneration. Group including only two varieties, Shinunbongbyeo and Sambaegbyeo had the excellent androgenic efficiency, and the medium efficiency of Group was included thirty-six varieties. Whereas twelve varieties, including three Tongil varieties were fell into the bad efficiency of Group. Especially, Tongil varieties containing Japonica rice, Obongbyeo were the recalcitrant genotypes for the anther floating culture.

• 한국식품조리과학회지
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• 제26권4호
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• pp.428-433
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• 2010

The aim of this research was to determine the relationship between quality of puffer fish and soak time in maturing water. This research used the cutting cranial nerve method, which is called the MSK method. The data was analyzed using the SPSS program. Based on salinity analysis result, both moisture content and pH were measured after 20 min of soaking. As the salinity of the maturing water increased, the moisture content initially decreased then increased once the salinity was greater than 3%. However, the concentration of the maturing water did not influence the pH level. The texture properties were measured to assess the effect of soak time in the maturing water. Hardness of the sample was highest (3.99) at 20 min, and cohesiveness also showed a maximum value (0.26) at 20 min. Gumminess and chewiness were highest 1.04 and 4.09, respectively, when the fish was matured for 20 min. Sensory properties were evaluated, and springiness, umami flavor, texture, and overall preference were highest at 20 min of soak time. The results showed that maturing the puffer fish for 20 min provided the best quality of texture and sensory characteristics for the fish.

• 한국작물학회지
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• 제14권
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• pp.133-137
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• 1973

우리나라 들깨 재래종 136과 일본품종 4합계 140품종에 대하여 개화 및 결실에 관한 제특성의 차이를 검토하며 품종의 생태형과 성숙군을 분류하고 이들 특성과 생태형, 성숙군간의 관계를 요약하면 다음과 같다. 1. 생태형의 분류는 개화일수의 단, 중, 장(I.II.III)에 결실일수의 단장(a,b)을 상호조합하여 Ia, Ib, IIa, IIb, IIIa, IIIb의 6형으로 나눈바 우리나라 재래종은 IIa, IIb 및 III형에 일본품종은 IIa, IIb에 각각 많이 속해 있었다. 2. 성숙군의 분류는 생육일수의 장, 단에 따라 조생 I에서 만생 III까지 3성숙군으로 나눈바 우리나라 재래종은 II군 및 III군에 일본품종은 I군과 II군에 각각 많이 속해 있었다. 3. 생태형과 성순군 사이에는 고도의 정(+)의 상관관계(0.685)를 볼 수 있었고 생태형은 개화일수, 생육일수와 성숙군은 개화일수, 결실일수 및 생육일수의 상호 유의적인 상관을 인정할 수 있었으나 우리나라 재래품종은 성숙군수가 많지 않지만 생태형 종수가 많다는 것은 도별로 환경조건과 재배방식간에 어떤 관계가 존재하는 것 같다.

• 한국자원식물학회지
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• 제10권4호
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• pp.386-391
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• 1997

벼 생태형별 조만성 차이가 뚜렷한 조생종으로 오대벼와 신운봉벼, 중생종으로 청명벼와 장안벼, 만생종으로 동진벼와 만금벼 등 6개 품종을 공시하여 호남노업시험장 수도포장에서 1993년 5월 5일부터 15일 간격으로 5회에 걸쳐 작기이동을 시켜 이들의 작물학적 특성을 비교, 검토하였던 바는 다음과 같다. 1. 작기이동에 따른 출수기변이는 조생종은 6월 5일 이앙 이후에는 파종에서 출수까지 일수가 89~90일에 출수되어 변이폭이 적었으며 모든 품종에서 이앙시기가 늦어질수록 출수일수는 짧아졌다. 2. 일수입수, 등숙비율 및 천립중은 조생종은 5월 5일 이앙구, 중.만생종은 6월 5일 이앙구에서 많거나 무거운 경향이었다. 3. 수량성은 조생종은 5월 20일 이앙구에서, 중.만생종은 6월 5일 이앙구에서 최대수량을 나타내었다. 그러나 이앙시기가 늦어졌을 때 조생종과 만생종의 차는 6월 20일 이앙구에서는 10a당 44~77kg, 7월 5일 이앙구에서는 10a당 26~30kg로 만생조이 더 증수됨을 알 수 있었다.

• 한국환경농학회지
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• 제18권1호
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• pp.1-5
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• 1999

유기물 시용 및 벼 기상 생태형별 $CH_4$ 발생양상을 구명하고 이를 근거로 논 토양에서 배출되는 $CH_4$ 배출량을 추정하기 위해 미사질 양토에서 시험한 결과를 요약하면 다음과 같다. 1. 시기별 $CH_4$ 배출은 조생종이 2번의 peak를 나타냈으며 중생종과 만생종은 3번의 peak를 나타냈으며 줄기를 통한 $CH_4$ 배출은 온도가 높을수록 많은 경향이었다. 2. $CH_4$배출량은 조생종에 비하여 중생종과 만생종이 높은 경향이었으며, 볏짚 시용구와 비교해볼 때 볏짚 무시용구에서 46%의 $CH_4$ 배출이 감소되었다. 3. $CH_4$ 배출 계수($gm^{-2}day^{-1}$)는 조생종이 0.394, 중생종이 0.407, 만생종이 0.411이었으며, 볏짚 무시용시 $CH_4$ 배출계수는 조생종이 0.198, 중생종이 0.269, 만생종이 0.273이었다.

• 한국연초학회지
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• 제19권2호
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• pp.77-82
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• 1997

In order to investigate biochemical activities of harvested tobacco leaves, photosynthetic rate, soluble protein contents, and peroxidale activities were analysed during different maturing period. Physiological activities of harvested leaves during maturing period were higher in topped than those of non-topped plants. Chlorophyll content and photosynthetic rate in both topped and non-topped plants decreased at 4 days and 3 days before harvest, respectively. The chloroplast numbers in topped and non-topped plants decreased at 3 days and 5 days before harvest, respectively. Changes of soluble protein and total RNA contents showed similar patterns during maturing period. Soluble protein contents were slightly decreased from 5 days before harvest in topped plants, but decreased drastically from 3 days before harvest in non-topped plants. Not much changes were found in total RNA contents in topped plants until 2 days before harvest, and it was largely decreased after 5 days before harvest in non-topped plants. The peroxidase activities drastically decreased in topped plants and increased in non-topped plants after 3 days before harvest during maturing period. The largest change of biochemical activities in tobacco leaves during maturing periods were observed at 3 days before harvest.

• 대한원격탐사학회지
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• 제28권6호
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• pp.653-660
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• 2012

This study classified paddy fields according to rice varieties and monitored temporal changes in rice growth using SAR backscatter coefficients (${\sigma}^{\circ}$). A growing period time-series of backscatter coefficients was set up for nine fine-beam mode RADARSAT-1 SAR images from April to October 2005. The images were compared with field-measured rice growth parameters such as leaf area index (LAI), plant height, fresh and dry biomass, and water content in grain and plants for 45 parcels in Dangjin-gun, Chungnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) ranged from -18.17 dB to -6.06 dB and were lower than those for medium-late maturing rice varieties during most of the growing season. Both crops showed the highest backscatter coefficient values at the heading stage (late July) for early-maturing rice, and the difference was greatest before harvest for early-maturing rice. The temporal difference in backscatter coefficients between rice varieties may play a key role in identifying early-maturing rice fields. On the other hand, comparisons with field-measured parameters of rice growth showed that backscatter coefficients decreased or remained on a plateau after the heading stage, even though the growth of the rice canopy had advanced.

• 한국식품저장유통학회지
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• 제4권1호
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• pp.77-85
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• 1997

This study aims to determine the optimal picking time and the favorate variety for Ume processing. The changes of physicochemical components and flavors of 6 varieties of the Ume were investigated during maturing. Average weight of the fruit increased to the range of 151-292% from 70 days to 90 days after blooming. The hardness of fruit decreased during maturing and Koume variety was not suitable for processing among the last harvesting samples. Moisture and ash were reached to 89-91%, 0.57-0.69%, respectively, and the ash content increased during maturing. Among the Ume varieties, relatively high content of total acid was observed in Oshuku and Koume. The major organic acid were malic, citric, succinic, and tartaric acid. The content of malic acid decreased significantly, whereas citric acid increased during maturing. Thirty five kinds of flavor components were identified from the Ume fruit and main components were ethyl acetate, butyl acetate, and organic acid derivatives. Koume contained a large amount of flavor components among the Ume and the content increased during maturing.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.243-245
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• 2007

This study was begun to classify the paddy fields by the rice varieties and to monitor the temporal change in rice growth using SAR backscatter coefficients $({\sigma}^{circ})$. For nine fine-beam mode images of Radarsat-1 SAR, a growing period time-series of backscatter coefficients was set up from April to October in 2005, and was compared with the field-measured rice growth parameters such as LAI (leaf area index), plant height, fresh and dry biomass, and water content in grain and plant for 45 parcels in Dangjin-gun, Chungcheongnam Province, South Korea. The average backscatter coefficients for early-maturing rice varieties (13 parcels) were ranged from -18.17dB to -6.06dB and were lower than for medium-late maturing rice varieties during most of the growing season. At around the heading stage (July 30) for early-maturing rice, both rice crops showed the highest backscatter coefficient values and the difference was the greatest before harvesting early-maturing rice. The temporal difference in backscatter coefficients between rice varieties was expected to play a key role to identify early-maturing rice fields. On the other hand, comparison with field-measured rice growth parameters showed that the backscatter coefficients decreased or stayed on the plateau after heading stage even though the growth of rice canopy advanced.

• 한국작물학회지
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• 제36권3호
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• pp.209-213
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• 1991

조숙옥수수를 포함한 사료작물 작부체계 구성시 조숙옥수수의 생산성을 확보하기 위해 만파시밀식재배를 시도하였다. 조숙옥수수로는 Comet80, Comet85, Linda 품종을 이용하였고 만파정도는 수원19호 적기보다 45, 55, 65일 만큼 늦게 파종하였다. 파종밀도는 각 파종기에 대하여 60$\times$20, 50x20, 40$\times$20cm로 밀식정도를 달리하였다. 각처리구의 수확은 8월 29일 일괄실시 하였는데 조숙옥수수의 이러한 처리에 따른 수량구성특성 변화와 조숙옥수수의 촉과작물 작부체계도입 가능성을 조사한 결과를 요약하면 다음과 같다. 1. 6월 22일까지 파종에서 건물수량은 Comet85, 수원19호 Comet80, Linda 순이었다. 2. 6월 12일까지의 파종에서 수원19호의 이삭비율은 6.7%이었는데 비해 Comet80, Cometss, Linda의 평균 이삭 빈율은 40.3%이었다 3. 조숙품종의 밀식에 의한 건물수량 보상효과정도는 6월 22일까지 파종에서 20x50cm밀도가 20$\times$60cm밀도에서 보다 평균 37.3% 증수하였다. 4. 만파시 Comet85는 수원19호보다 평균 24.1 % 많은 TDN을 생산하였다.