• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.267-267
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• 2017

In Korea, the average air temperature has been elevated twice faster than the average global warming. And the climate warming is characterized by the smaller rise of air temperature in summer and the greater rise of air temperature in spring and winter. Therefore, the number of frost-free days to determine the cultivation ability of crops has increased by more than 15 days in 10 years according to climate warming. This climate warming trend has extended and is projected to extend not only the sweet potato growing season but also the sweet potato early cultivating area to higher altitude and latitude region. This study was carried out to evaluate the possibility of sweet potato double cropping in the southern island area of Korea by assessing the growth and yield performance of sweet potato cultivated at extremely-early and -late time. We had performed at Yokji Island Yokji Island($E128^{\circ}$ 18' $N34^{\circ}$ 36'), a representative specified complex area of sweet potato cultivation in southern Korea. As the test varieties, the major cultivars of the this region, Shinyulmi and early hypertrophic cultivars, Dahomi were used. The prior cropping were planted with PE film mulching on March 30 and April 10, and harvested after 110 days. So the succeeding cropping were planted without PE film mulching on July 25 and August 5 according to the harvesting time of the prior sweet potato and harvested after 120 days. As a control, it was harvested on September 15, 120 days after planted on May 15. Each experimental plot had an area of 12 square meters consisting of 4 beds, and was planted one at a time at intervals of 25cm. We had investigated growth characteristics - main vine length, node number, branch number, total vine yield, and tuberous root characteristics - tuberous root number, average weight, starch value, and etc. After harvesting, we analyzed the economic effects by examining the postharvest quantity, the input labor, the management cost, and the income. The total yield of marketable products in prior and succeeding cropping was 46~70% higher than that of control. The average unit price of sweet potato was 36% higher than the conventional culture, and the gross income increased by 98%, but the operating cost increased by 83%, and the farm income increased by 103%. There are considerations such as the difficulty of enlargement of cultivation area due to lack of labor in limited space and the need for watering measures due to spring drought. However, if the area of application for sweet potatoes double system is increased by 10%, it can be used as a new cropping system.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.331-331
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• 2017

This study was conducted to know the influence of air temperature and sunshine duration on yield, chemical component, pigment color difference and starch characteristics of two colored rice cultivars in the plain area of Yeongnam province in Korea. The $L^*$, $a^*$, and $b^*$ value of brown rice in Hongjinju and Josaengheugchal rice cultivars was significantly different at continuous cultivated years, 2015 and 2016. The $L^*$, $b^*$ value of two colored rice was significantly increased in 2016 compared to 2015. The $a^*$ value of Josengheugchal rice cultivar was also significantly higher at 2016 than at 2015. It can be noticed the $a^*$, $b^*$, $L^*$ values in Josaengheugchal varied more than those in Hongjinju. Air temperature during ripening period in 2016 was higher than 2015, especially minimum temperature was too high to proper maturation for rice quality. In Josaengheugchal rice cultivar, sunshine duration after heading was longer in 2016 than in 2015. On the contrary, Hongjinju rice cultivar was ripened under condition of insufficient sunshine duration in 2016. The short growing duration by high temperature and long shiny duration made the lack of pigment for Josaengheugchal brown rice. In Hongjinju rice cultivar, shorten sunshine duration and higher night temperature were the source of the pigment deficiency. The grain size of rice which produced in 2016 was bigger than that of 2015 in both rice cultivars. The 1,000 grain weight of rice from 2016 was also bigger than that of 2015. Head rice ratio was high in the rice cultivars produced in 2015. Protein of milled rice in 2016 was more decreased than that of 2015 in Josaengheugchal rice cultivar, it showed reverse result in Hongjinju rice cultivar. Amylose contents of milled rice in 2016 were more decreased than that of 2015 in Hongjinju rice cultivar. Branch chain length distribution of amylopectin was shown a distinct difference between Josaengheugchal and Hongjinju rice flours by each produced year. Josaengheugchal rice cultivar produced in 2015 had a higher amount of short chains than that of 2016 rice starches. In Josaengheugchal rice cultivar, the pasting temperature and peak, trough, breakdown, final viscosity increased in rice flour which produced at 2016, whereas the setback viscosity and peak time showed lower value than those of rice from 2015. The most pasting properties (except of setback viscosity) of rice starch in Hongjinju rice cultivar grown in 2015 were higher than those of rice cultivar produced in 2016.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.96-96
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• 2017

Rice is a staple food for nearly half of the world's population, with more than 10,000 rice varieties providing almost one-quarter of the global per capita dietary energy supply. Grain size, panicle size and branch number, grain number in a panicle are directly associated with rice productivity. Recently several genes which increase grain yield were identified through map-based cloning. Gn1a, Cytokinin oxidase, is a major grain number QTL and regulates grain number per panicle. Dep1 increases panicle branching and reduced rachis length. SCM2 (APO1) was identified by a QTL for culm strength and increased spikelet number. OsSPL16 (GW8) controls grain size and shape and then increases 1000-weight of seed. In here, to identify genotype of genes related to yield in 400 of rice germplasms possessed in National Institute of Crop Science, we had first chosen 4 of well-known genes related to yield; Gn1a, Dep1, SCM2, and OsSPL16. Among these germplasms, 195, 382, 165, and 353 of germplasms harbored the dominant type of Gn1a, Dep1, SCM2, and OsSPL16, respectively. We grouped these germplasms into a total of 10 groups using genotypes of Gn1a, Dep1, SCM2 and OsSPL16. Most rice germplasms belong to group 1, harbored Gn1a, dep1, gw8 and APO1, and group 10, harbored gn1a, Dep1, GW8 and apo1. Hanareum2 is the highest productive cultivar in Korea but do not have dominant type OsSPL16, so belong to group 1. On the other hand, in the case of Unkwang, belongs to group 10, which has dominant type of OsSPL16 but do not have the remaining genes. We can grasp the differences in rice germplasms through the Profiling of genes related to these grain yield, which will be useful for cross-breeding to integrate grain yield genes. We are continuously observing the genotype and phenotype of rice that possesses grain yield genes.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.280-280
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• 2017

In Korea, the average air temperature has been elevated twice faster than the average global warming. And the climate warming is characterized by the smaller rise of air temperature in summer and the greater rise of air temperature in spring and winter. Therefore, the number of frost-free days to determine the cultivation ability of crops has increased by more than 15 days in 10 years according to climate warming. This climate warming trend has extended and is projected to extend not only the sweet potato growing season but also the sweet potato early cultivating area to higher altitude and latitude region. This study was carried out to evaluate the possibility of sweet potato double cropping in the southern island area of Korea by assessing the growth and yield performance of sweet potato cultivated at extremely-early and -late time. We had performed at Yokji Island Yokji Island($E128^{\circ}$ 18' $N34^{\circ}$ 36'), a representative specified complex area of sweet potato cultivation in southern Korea. As the test varieties, the major cultivars of the this region, Shinyulmi and early hypertrophic cultivars, Dahomi were used. The prior cropping were planted with PE film mulching on March 30 and April 10, and harvested after 110 days. So the succeeding cropping were planted without PE film mulching on July 25 and August 5 according to the harvesting time of the prior sweet potato and harvested after 120 days. As a control, it was harvested on September 15, 120 days after planted on May 15. Each experimental plot had an area of 12 square meters consisting of 4 beds, and was planted one at a time at intervals of 25cm. We had investigated growth characteristics - main vine length, node number, branch number, total vine yield, and tuberous root characteristics - tuberous root number, average weight, starch value, and etc. After harvesting, we analyzed the economic effects by examining the postharvest quantity, the input labor, the management cost, and the income. The total yield of marketable products in prior and succeeding cropping was 46~70% higher than that of control. The average unit price of sweet potato was 36% higher than the conventional culture, and the gross income increased by 98%, but the operating cost increased by 83%, and the farm income increased by 103%. There are considerations such as the difficulty of enlargement of cultivation area due to lack of labor in limited space and the need for watering measures due to spring drought. However, if the area of application for sweet potatoes double system is increased by 10%, it can be used as a new cropping system.

• Archives of Reconstructive Microsurgery
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• 제15권1호
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• pp.17-25
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• 2006

Twelve cases in eleven patients with segmental bone defects were treated with contralateral fibula free flap and ipsilateral island fibula flap in an antegrade, retrograde or bidirectional flow fashion. Five cases were managed with free flaps and seven were with ipsilateral fibula island transfer. Among seven cases, antegrade fashion was three, retrograde was three, and bidirectional was one. All patients were related with open tibial fractures and its sequelae except one who had open foot bone fracture. According to Gustilo's classification, ten patients were type IIIb and one was type IIIc. Basically, antegrade-flow flaps based on the peroneal vessels as in the conventional free flap were used for the proximal or middle one-third tibial defects. On the contrary, retrograde-flow flaps based on the communicating branch between the peroneal and posterior tibial vessels were used for the middle or distal one-third of the tibia. Bidirection-flow flap based on intact peroneal vessels were used for the middle portion of the tibia. The patients who have undergone ipsilateral fibula island flap had one of the following problems: a previously failed free flap, below-knee amputation of the opposite leg because of open tibial fracture, refusal to use the contralateral sound leg, or poor general condition to stand a lengthy operation. Six of the patients who have got ipsilateral fibula island flap also had an associated fibula fracture on the same leg, which was ultimately used as one of the osteotomy sites. The follow-up period was from 1 to 10 years. Two cases of free flap were failed: one patient had below-knee amputation and the other patient had ipsilateral fibula transfer. Other cases were successful and excellent hypertophy of the transferred fibula was achieved. Time to bone union ranged from 4 to 11 months. Time to full weight bearing was from 5 to 13 months after surgery. All of the transferred fibulas showed hypertrophy after weight bearing. In one case, stress fracture was developed during ambulation, which was healed conservatively. Nonunion occurred in two cases, which were treated with a long leg cast and cancellous bone graft, respectively. Length discrepancy of the legs was noted. The limb was shorter by an average 0.5 cm in three cases, longer by 1.1 cm in one case. In the case of island fibula transfer, limited arc of rotation was not a problem. Other disabling complications were not seen. We believe that these diverse modalities using a vascularized fibula will make us more comfortable to handle major bone defects.

• 식물병연구
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• 제12권1호
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• pp.10-14
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• 2006

2000년부터 2003년에 걸쳐 전국의 포도 과원에서 채집한 병반에서 순수 분리한 병원균을 관련 연구문헌에 기록된 Pseudocercospora vitis ($(L\acute{e}v)$.) Speg.에 관한 기술 내용과 균사 및 분생포자의 형태와 생리적 특성 등을 비교한 결과 동일한 균으로 동정하였다. 온도변화에 따른 갈색무늬병균의 균사생장은 $10{\sim}35^{\circ}C$에서 균사생장이 이루어 졌고, 시험온도 중에는 $25^{\circ}C$에서 가장 왕성한 생장을 하였고, 채집한 지역에 따라서는 편차가 거의 없었다. 분생포자는 $10{\sim}35^{\circ}C$ 범위에서 발아가 가능하였고 $25^{\circ}C$가 최적이었다. 갈색무늬병이 심하게 발생한 포도나무의 집단과 비교적 건전했던 포도나무의 집단 간에는 당해연도의 결과지당 잎 수에서 현저한 차이를 보였다. 다음 해의 결과지 마디의 길이는 갈색무늬병이 심하게 발생한 포도나무의 집단은 6.74cm이었던 반면 비교적 건전했던 포도나무의 집단은 9.07cm로 차이를 나타냈으며, 마디의 직경은 각각 5.09mm와 8.12mm로 차이가 현저하였다. 갈색무늬병 발생에 의한 조기낙엽과 결과지의 길이가 짧고 굵기가 가는 이 결과는 포도나무의 동화작용에 지장을 초래함은 물론이고, 동화산물의 축적 면에서도 불리하여 포도나무의 전체적인 생장에 큰 영향을 미칠 것으로 판단되었다.

• 한국약용작물학회지
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• 제9권4호
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• pp.301-309
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• 2001

홍화 수집종들의 작물학적 특성을 통하여 유전적 다양성 및 유연관계를 밝히고, 품종군을 분류하여 품종육성의 기초자료로 이용코자 시험한 결과를 요약하면 다음과 같다. 개화일수는 $74{\sim}88$일 분포로 평균 83일이었고, 80일 이하의 조숙성을 가진 수집종은 21개 이었으며, 1차분지수와 2차분지수는 각각 $3.8{\sim}14.8$개와 $0{\sim}26.9$개의 범위로 분포하였고, 다분지형의 특성을 가진 품종은 IT201434, IT202723 등 이었으며, 생육특성 중 2차 분지수의 변이가 켰다. 수량구성 요소로서 두상화수는 $5.0{\sim}40.7$개, 두상화당 종실수는 $25{\sim}68$개, 100립중 및 주당 종실중은 각각 $2.9{\sim}5.4g,\;3{\sim}47.5g$의 범위로 분포하였고, 종실중 > 두상화수 > 두상화당 종실수 순으로 변이가 큰 경향이었다. 수집종들은 작물학적 특성에 따라 11개군으로 분류되었으며, I군은 25%, II군은 33%, III군은 14%, IV군은 8%, VI군은 3%, IX군은 2%, X군은 1%, ?군은 1%가 속하였으며, III군은 모두 국내재래종 이었다. 분류된 군중 X군은 출아소요일수가 짧고, 개화소요일수가 길었으나 수량 구성 요소인 두상화수, 주당 종실중 및 두상화당 종실수가 가장 우세한 군으로 분류되었다. 수량구성요소인 두상화수와 주당 종실중은 경직경, 제1차분지수, 제2차분지수, 엽수 및 엽장과 높은 정의 상관을 보였다.

• 원예과학기술지
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• 제18권4호
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• pp.503-507
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• 2000

정지방법이 '신사기가께2호'와 '시시도우' 고추의 생육 및 수량에 미치는 영향을 구명하기 위해 본 시험을 수행하였다. 정지방법은 정지유인 본수를 2 또는 4본 및 방임 등 3처리를 두었다. 4본 정지는 4개의 주지를 유인하여 측지를 3절에서 적심하였고 2본 정지는 2개의 주지를 유인하였으며 방임은 측지의 정지없이 방임으로 재배하였다. 생육은 '신사기가께2호'와 '시시도우' 모두 2본 정지유인에서 촉진되는 경향이었다. 과장, 과경, 과육두께는 정지방법에 영향을 받지 않았다. 상품률은 2본 정지유인에서 높았고 주당 상품과수는 4본 정지유인시 가장 많았다. 상품수량은 4본 정지유인시 상품률이 높고 주당 상품과수가 많아 방임에 비해 '신사기가께2호'에서는 15%, 그리고 '시시도우'에서는 5%의 증수효과가 있었다. 두가지 품종의 고추에 대한 연구결과, 4본 정지유인이 다른 처리에 비해 수량과 품질이 높았으며 품종간에는 '시시도우'보다는 '신사기가께2호'에서 더 현저한 효과를 보였다.

• 생물환경조절학회지
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• 제10권3호
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• pp.181-186
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• 2001

시설에서 고추, 오이, 토마토 등 과채류 생육기간에는 초관 하부에 광이 부족하게 된다. 본 연구는 플라스틱필름 시설에서 풋고추를 재배할 때 산광필름이 생육, 초관, 개화 및 착과에 미치는 영향을 구명하고자 실시하였다. 시설내 환경을 측정한 결과, 일사량의 투과율은 직조필름과 복층필름에서 일반필름의 90%, 75% 수준이었다. 또한 광합성유효광의 투광율은 직조필름과 복층필름에서 일반필름의 96%, 81% 수준이었다. 그러나 직조필름, 복층필름 및 일반필름의 산란광율은 각각 46%, 31%, 9%이었다. 일반필름으로 피복된 시설에서 정식후 48일 측정한 초장은 직조필름과 복층필름으로 피복된 시설보다 각각 13.9cm, 6.5cm 큰 96.9%cm이었다. 그리고 제3절의 길이는 직조필름과 복층필름으로 피복된 시설보다 각각 5.7cm, 2.5cm 짧은 8.6cm이었다. 또한 직조필름으로 피복된 시설에서 제1분지각은 복층필름과 일반필름으로 피복된 시설보다 2.3$^{\circ}$큰 61.0이었고, 붙임과율은 1.2%, 3.6% 낮은 2.1%이었다. 그러나 피복재간의 풋고추 분지수와 비타민C의 함량은 차이가 없었다.

• 한국초지조사료학회지
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• 제21권1호
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• pp.39-44
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• 2001

대관령지역에서 사료용 옥수수 품종의 생육특성과 생산성을 비교 검토하여 생산성이 높은 품종을 농가가 선택할 수 있는 기초자료를 얻고자 국내에서 육성된 수원 19호를 대비품종으로 하고 현재 많이 재배되는 8개 장려품종을 공시하여 1999년도에 난괴법 3반복으로 대관령지소(해발 800m) 포장에서 수행한 결과를 요약하면 다음과 같다. 생육특성 중 간장은 DK501, GL499 품종이 각각 180, 198cm로 가장 적었고 그 외 품종은 230cm 내외로 품종간에 큰 차이가 없었다. 착수고는 간장이 적은 품종에서 낮게 나타났고 P3525, DK729는 각각 120, 116cm로 다른 품종에 비하여 10~l5cm 높았다. 경직경은 수원19호에 비하여 DK501를 제외한 전 품종에서 굵었으며 특히 P3144W가 24.2cm로 가장 굵었다. 생엽수는 숙기가 늦은 DK729, G4743이 각각 12.0, 12.3개/주로 가장 많았다. 출사기는 8월 10일~20일로 품종간에 10일 차이로 매우 크게 나타났다. 가장 빠른 품종은 DK501로 8월 10일, 가장 늦은 품종은 G4743으로 8월 20일이었다. 암이삭 비율은 출사기가 빠른 품종에서는 46% 이상 늦은 품종은 40% 이하이었다(P>0.1). 건물 및 TDN 수량은 P3352 품종이 각24.710, 17,470kg/ha로 가장 많았으며 그 다음이 DK729, G4743순이었다(P<0.05). 따라서 대관령지역에서는 조.중생종 품종인 P3352가 가장 수량도 많고 생육특성 면에서도 유리하여 적합한 품종으로 생각된다.