• 농업과학연구
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• 제40권4호
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• pp.425-434
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• 2013

Nowadays, the korean peninsula has endured weather changes toward to the subtropical climate. Also demographical structure has changed into multi-cultural society in which many people from subtropical areas have immigrated into Korea. Therefore, consumption and production of subtropical vegetables become important. For the analysis, we choose eight important subtropical crops. EDM (Equilibrium Displacement Model) with many parameters and elasticities is used for the forecast of consumption and required cultivation area. The simulation focuses on the changes of the number of foreign workers and immigrated women in Korea to predict the quantity of consumption and required area in Korea. The results show that we need additional land area about 581~1,065 ha for the cropping subtropical vegetables in Korea. Finally, these required area can be provided by the cities and counties in coast area in Gyeongsangnam-Do, Jeonranam-Do and Jeju-Do. Climate change will be continued in the future. Together with climate change, the change of demographical structure into multi-culture may increase consumption and production of subtropical vegetables. Forecasting of increased consumption and required cultivation area for subtropical vegetables is significant.

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 2006년도 춘계 학술대회 및 정기총회
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• pp.192-196
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• 2006

• 생물환경조절학회지
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• 제15권4호
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• pp.385-389
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• 2006

단호박의 억제재배시 착과율 향상 및 유인노력 절감을 위한 한라산 중산간지(해발 600m) 육묘 효과를 검토 하였다. 정식직전 묘의 T/R율은 평지 육묘 9.5로 도장된 경향을 보였으나 중산간지 육묘에서는 5.4로 건실한 묘 생육을 보였다. 육묘 지역에 따른 1번 암꽃의 착생 위치는 평지 육묘 26.0마디에 비하여 중산간지 육묘 19.4마디로 크게 낮아졌으며 2번 암꽃 및 그 이후에 착생되는 암꽃들도 평지 육묘에 비하여 3$\sim$5마디 아래에서 착생되어 유인노력을 20% 정도 절감할 수 있었다. 2번과 착과율은 중산간지 육묘 17.2%로 평지 육묘 1.4%에 비하여 16%정도향상 되었다. 상품 수량의 경우 평지 육묘 3,500kg/10a에 비하여 중산간지 4,460kg/10a로 27%가 증가하여 한라산 중산간지를 이용한 여름철 육묘 효과가 크게 나타났다.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2016년도 추계 학술발표논문집
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• pp.161-166
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• 2016

• 한국패류학회지
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• 제30권1호
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• pp.57-77
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• 2014

The bivalve molluscan fauna of Ulsan Bay, East Sea coast of Korea, is summarized, based on original and literature data. The fauna consists of 61 species belonging to 20 families. Seven species are identified only to genus level. Two species (Carditellopsis toneana (Yokoyama, 1922), Carditidae and Fulvia hungerfordi (G.B. Sowerby III, 1901), Cardiidae) are new records for the East Sea coast of Korea, and one species (Crenella decussata (Montagu, 1808), Mytilidae) is a new record for Korea. Biogeographically, Ulsan Bay's bivalve fauna is subtropical with a predominance of tropical-subtropical species, 21 species, or 39% of the total species number, subtropical, 14 species, or 26%, and subtropical-boreal (mostly subtropical-lowboreal), 11 species, 21%, totalling 86%. A remarkable feature of the Ulsan Bay fauna is the presence of tropical-subtropical species not found in Yeongil Bay but common in tidal flats and shallow waters of the Yellow Sea and the southern part of Korea. A cold water mass appearing off the southeast coast of Korea near Ulsan in summer seems responsible for the presence of boreal-arctic species in this area.

• Asian-Australasian Journal of Animal Sciences
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• 제13권1호
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• pp.6-9
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• 2000

The purpose of this study was to evaluate the effect of lower numbers of sperm $(3{\times}10^9)$ per dose liquid semen and type of semen used in artificial insemination (AI) on sow reproductive performance in subtropical area. Semen was supplied by two commercial AI centers. A total of 671 female pigs from seven farms were inseminated with either $3{\times}10^9$ or $5{\times}10^9$ sperm per dose. Two types of semen were used: heterospermic semen from two boars of the same breed and homospermic semen from a single boar. After insemination, conception rate, farrowing rate, total litter size, and number of dead piglets were recorded. The analysis of variance indicated that there was no significant effect of interactions between pig farm, type of semen, or number of sperm on any of the traits measured. There were significant differences in conception rate, farrowing rate, and total litter size among pig farms (p<0.05). The effect of number of sperm per dose liquid semen ($3{\times}10^9$ or $5{\times}10^9$) was not significant. Sows inseminated with homospermic semen showed significantly higher conception and farrowing rates but significantly lower total litter size (p<0.05). In conclusion, the number of sperm per dose liquid semen for AI could be lowered to $3{\times}10^9 $ without affecting reproductive performance in subtropical areas like Taiwan.

• 식물분류학회지
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• 제49권3호
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• pp.215-223
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• 2019

Recently, it has become known that Gotjawal terrain is an important area, therefore the study on this area has conducted in the geological, ecological, and cultural aspects. The studies on bryophytes of Gotjawal, however, have not been sufficiently performed. This study presents a survey on the bryophytes of the evergreen broad-leaved forest of Cheongsu-ri at Hangyeong Gotjawal in the southwestern part of Jejudo Island, Korea. A total of 72 taxa belonging to the Bryophyta (18 families 43 genera 55 species) and Marchantiophyta (11 families 13 genera 17 species) were determined and the liverwort index was 23.6%. Predominant life-form was weft. The rates of the bryophytes dominating in mesic to hygric sites were higher than the bryophytes mainly observed in xeric habitats. These values indicate that the forests are widespread and dense in this study area. Upon an investigation of the substrates, the bryophytes on rocks were most diverse. The results appear to stem from the fact that volcanic rock masses of various sizes lay scattered over the study area, offering numerous micro-habitats for bryophyte due to one of the characteristics of Gotjawal. We suggest that more detailed studies should be conducted at the regional scale to establish the bryophyte flora of Gotjawal and the evergreen broad-leaved forests on Jejudo Island.

• 한국산학기술학회논문지
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• 제21권12호
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• pp.524-535
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• 2020

본 연구는 국내 아열대 작물의 재배동향을 분석하여 주산지를 도출하고, 정책지원 및 후속 연구의 기초자료를 제시하였다. 분석결과, 망고를 제외한 나머지 아열대 작물의 재배면적은 정체 또는 감소세를 보였다. 망고와 용과의 주산지는 제주도, 파파야는 경상남도, 강황은 전라남도에 재배면적이 집중된 것으로 나타났다. 구아바와 여주는 재배면적과 농가수가 미미하여 주산지의 정의가 어렵고, 아열대 채소인 여주와 강황은 상위 재배면적을 차지한 시군의 분포가 넓은 것으로 나타났다. 모든 작물에서 상위 10개 지역의 재배면적 비중이 높게 나타났으나, 상위 10위권을 매년 유지한 지역은 절반에 그쳤다. 이는 아열대 작물의 도입과 포기, 재배면적의 확대와 축소가 빈번함을 의미한다. 아열대 작물의 보급과 확대는 향후 기후변화에 대한 농업 부문의 선제대응과 농가 신소득 창출의 측면에서 당위성을 가진다. 정부와 농촌진흥기관은 상위 재배면적이 유지되는 지역을 중심으로 재배기술을 정립하고, 재배면적이 축소되는 지역의 기술적 원인을 규명할 필요가 있다. 또한 농가경영 컨설팅을 위한 기초자료의 구축, 지역별 생육 여건을 고려한 맞춤형 재배기술 개발에 연구지원을 확대할 필요가 있다.

• 한국환경과학회지
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• 제22권1호
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• pp.99-107
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• 2013

This study surveyed the distribution and characteristics of epiphytes and host trees in Jejudo's warm-temperate evergreen forests area. The gathered data will be used for evaluating ecological changes according to climate change. The study found 46 species of epiphytes in Jejudo; 12 of which were species of pteridophytes and 5 species of orchids, totaling 17 species of epiphytes. The appearance frequency was the greatest with Lepisorus thunbergianus, followed by Lemmaphyllum microphyllum and Lepisorus onoei. The area with the greatest diversity of epiphytes was nutmeg tree forests which have the largest number of 2.89 average species. Lemmaphyllum microphyllum had the greatest percent cover of the epiphytes whose importance was found to be the greatest. The factors involved were the epiphytes' diversity index (0.64), maximum species diversity (1.23), evenness (0.52), and dominance (0.48). The study has noted the distribution characteristics of epiphytes according to altitudes above sea level. The Lemmaphyllum microphyllum can survive at an altitude of 600 m above sea level, Lepisorus thunbergianus at 200 - 1,400m above sea level, Lepisorus onoei. at 400 - 1,000 m, and Gonocormus minutus at an altitude above 800 m. The host trees, consisting of Quercus serrata, Castanopsis cuspidata var. sieboldii, and Carpinus laxiflora, stands at 2-19 m high and 2.5 - 120 cm wide, showing diverse kinds of trees and sizes. Jejudo's warm-temperate evergreen forests have lower epiphyte diversity compared with those of subtropical and tropical areas in Japan and China. Based on the characteristics of the host trees order, epiphytes' distribution associated with the altitude above sea level was typical.

• 생물환경조절학회지
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• 제13권1호
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• pp.39-43
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• 2004

수출용 단호박의 품질 및 생산성 향상을 위한 비가림 입체재배에서의 적정 재식거리를 구명코자 수행하였다. 재식거리는 120 cm 이랑에 2조식으로 주간거리 30 cm, 40 cm, 50 cm로 하여 하였다. 주지 적심전 생육은 주간거리가 좁았던 처리에서 만장과 생체중, 엽면적이 감소되었다. 수확시의 생육에서는 처리간 생체중의 경우 주간거리 50 cm로 넓었던 처리에서 증가하였다. 암꽃 개화일과, 암꽃 착생마디에서도 차이를 보이지 않았다. 과일 특성에서는 1번과의 과경과 2번과의 과중이 주간거리 50 cm에서 커지는 경향이었다. 평균 과중도 주간거리 30 cm의 1,184 g에 비하여 50 cm에서 1,386g으로 가장 무거웠다. 수확시의 당도에서는 주간 거리간에 차이를 보이지 않았다. 총 수량이 경우 재식주수가 많았던 30 cm 처리구에서 6,510 kg/10a로 가장 많았으나, 과중 130 kg 이상의 상품과의 비율은 40cm 와 50cm에서 98% 이상으로 비슷하였으나, 주간거리가 좁았던 40cm에서 5,012 kg/10a로 가장 많았다.