• 생물환경조절학회지
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• 제10권4호
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• pp.225-231
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• 2001

This study was conducted to examine effect of different environment conditions in glass, PC, PET and PE greenhouses controlled by different environment control systems on the growth of green pepper. Light transmittance of 64.7% in the glass greenhouse was the highest among different green-houses. Air temperature was the highest in the glass greenhouse when ventilators were closed, and was the highest in the PE greenhouse when ventilators were open. Air relative humidity was the highest in the PE greenhouse during 24 hours. The amount of solar energy accumulated in soil was the greatest in the glass greenhouse and this energy released during the night escaped through covering materials. Latent heat and solar energy affected air temperature increased in greenhouses. The air temperature of glass greenhouse was 27.5$^{\circ}C$ at 11 O clock, which was the highest air temperature among the all greenhouse types. Clear differences were observed in leaf area and plant height at 30 days after transplanting. Days to first flowering was the shortest in the glass greenhouse with 72.7 days. Flower shedding was the greatest in the PE greenhouse with 12.6%. Days to fruit harvesting was the shortest in the glass greenhouse with 14.3 days. Fruit quality, such as fruit length, fruit diameter, fruit flesh thickness, and vitamin C content, was the best in the glass greenhouse. Percent marketable fruits was the highest with 95.3% when the pepper was grown hydroponically in the glass greenhouse.

• 한국작물학회지
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• 제42권4호
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• pp.466-472
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• 1997

Vegetable perilla, "Ipdlkkae 1"(Perilla frutescens var japonica Hara), was tested about the flowering and maturing responce in summer and winter. In summer season, it was researched about those responses according to the change of seeding date from May 15th to Oct. 15th at one month interval in the field. "Ipdlkkae 1" flowered Oct. 2nd under the day length of eleven hours and fourty-one minutes, compared with Sep. 6th (day length of twelve hours and fourty-three minutes) of "Yepsildlggae". And those responses showed that vegetable perilla was have to seeded before July 15th for two reason. The first is a unique response of perilla to day length. If perilla stay under short-day condition for some days, perilla will flower after four weeks. The second is a weather, especially frost and cold. In the test of latest seeding at Oct. 15th, the plants flowered more late than normal flowering period and they were not able to mature for frost of early winter. And this result showed that any other species, which has the characteristic of later flowering than that of "Ipdlkkae 1", could not able to mature in the field. In winter time, this species was tested about the same responses according to the change of short-day treatments. In the case of the test from May 1st (above fourteen hours day length), even if the test plants were stayed under short-day condition for more than 10 days, they were not able to mature, but flowerd. From the test of Apr. 15th, day length of thirteen hours, the plants were showed variable reaction to the short-day treatment. In this test, 11days for short-day treatment was a basic day to decide whether flowering was delayed or not. In the test from Apr. 1st, perilla seeds were able to harvest at least 5 days short-day treatment. In the final test from Mar. 15th, it had no need to take short-day treatment for harvesting of normal seeds, because the day length of that are twelve hours, which is an enough time to induce flowering and maturing, previously reported.

• 원예과학기술지
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• 제33권1호
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• pp.61-69
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• 2015

본 연구는 수출용 스탠다드 국화 '백마'의 모의 수송온도와 개화단계에 따른 절화의 품질과 수명에 미치는 영향을 조사하여 적정 수송온도와 수확시기를 구명하고자 실시하였다. 개화 4단계의 '백마' 절화를 수확하여 $5^{\circ}C$에서 24시간 수송한 후 5, 20, $35^{\circ}C$에서 48시간 모의 수송하여 절화의 품질을 조사하였다. 또한 개화 1단계에서 6단계까지의 절화를 수확하여 $5^{\circ}C$에서 72시간 동안 모의 수송한 후 절화의 품질을 조사하였다. 수송온도가 높아질수록 유통박스 내의 $CO_2$ 농도는 급격히 높아졌으며, $O_2$ 농도는 크게 감소하였다. $35^{\circ}C$와 $20^{\circ}C$보다 $5^{\circ}C$에서 수송하는 것이 절화수명이 3.8일 연장되었으며, 잎의 엽록소 함량도 345.7로 가장 많았다. 또한 $35^{\circ}C$보다 $5^{\circ}C$ 수송조건에서 절화의 생체중과 흡수량이 높게 유지되었을 뿐만 아니라 화경도 보존용액에서 8일째에 2.3cm 더 길었다. 개화 6단계보다 개화 1-2단계에서 수확한 절화의 수명이 5.2-5.5일 연장되었다. 그러나, 개화 1단계부터 3단계까지의 절화들은 개화 4-6단계보다 생체중이 낮았을 뿐만 아니라 화경도 1.3-2.5cm 더 작았다. 또한 개화 4-6단계의 절화는 개화 1-3단계의 절화에 비해 상대적으로 흡수량이 많은 것으로 나타났다. 따라서 일본 수출용 '백마'는 설상화의 개화상태와 품질을 고려한다면 개화 4단계의 절화를 $5^{\circ}C$ 조건에서 수송하는 것이 가장 바람직하다고 판단되었다.

• 원예과학기술지
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• 제33권4호
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• pp.486-491
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• 2015

본 연구에서는 조생종 '한아름'과 중생종 '신고'에서 만개전 적화처리가 과실의 비대 및 품질에 미치는 영향을 조사하기 위하여 만개 전 5일에 적화처리를 실시하였다. 처리내용은 무처리구, 기부로부터 1, 2번화 제거구(T1), 6, 7번화 제거구(T2)로 나누어 실시하였다. 조생종 '한아름'의 경우 최종수확기에는 3.6%(T1) 및 4.6%(T2)의 크기 증가를 보였고 수확기 과실무게도 10.5%(T1) 및 11.0%(T2)의 증가를 보였다. 중생종 '신고'에서는 최종 수확기에는 12.6%(T1) 및 16.8%(T2)의 과실무게 증가를 보였고 두 품종 모두 대과의 생산비율이 증가하는 경향을 보였다. 적화처리구는 수확기 가용성고형물 함량이 $1^{\circ}Brix$ 정도 증가하였으며 '신고'의 경우에도 무처리구에 비해 적화처리구의 과실에서 높은 적색도를 보였다. 따라서 조생종 '한아름'과 중생종 '신고' 배에 대한 만개 전 적화 처리는 과실의 비대촉진 및 가용성 고형물 증가 및 과피색 향상에 효과를 보이는 것으로 조사되었으며 화총의 기부로부터 6, 7번째 착색된 꽃을 제거하는 것이 보다 실용적인 방법으로 추천되었다.

• 원예과학기술지
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• 제30권3호
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• pp.338-341
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• 2012

한국에 자생하는 초롱꽃식물은 분화 및 조경용으로써의 이용가치가 높은 식물이다. 본 연구는 애기초롱꽃(C. punctata Lam.)을 모본으로, 자주초롱꽃(C. punctata Lam. var. rubriflora Mak.)을 부본으로 하여 표현형이 왜화된 $F_1$ 식물 '직녀'를 육 성하였다. 2001년 6월에 교배 시작하여 10월에 채종하였다. 이후 $5^{\circ}C$ 저온저장 후 2002년 3월에 파종하였다. $F_1$ 품종 특성으로는 화색은 자주색이며 초장, 엽장, 엽폭, 화경 등에서 각각의 모본에 비해 중간형질을 보였다. 개화특성은 각 소화경의 개화기간은 평균 14일이며, 식물체 전체 개화기간은 4개월이었고, 재배 시 추대를 위한 저온감응을 꼭 필요로 하는 식물로써 관수 시 과습은 피하는 것이 좋다.

• 한국연초학회지
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• 제9권1호
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• pp.11-17
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• 1987

KA 101 and Xanthi-Basma were cultivated in Korea and Greece to compare the respective responses to environment and cultivation method on their growth characteristics and some properties of harvested leaves during 1984 and 1985. The contents of clay, calcium, organic matter and pH were higher in the soil of greece than that of Korea. Sunshine hours and precipitation in Greece during harvest and curing season were 8.6 hours per day and 53.3mm compared to that of 3.8 hours per day and 320mm in Korea, respectively. The plant height, leaf size and yield decreased, and days to flower was shorter 8-11 days in greek grown plants. The dehydration and curing process in Greece was linear and rapid due to the constant daily change of temperature and relative humidity with dry weather during curing season during curing season. But those process in Korea was variable and tardy due to rainy weather. Cured leaf ratio increased with upper stalk leaves in Greece but it was rather lower at top stalk position in Korea. The harvested green leaf cultivated in Greece showed higher contents of petroleum ether extract, total nitrogen and nicotine, but lower contents of reducing sugar and lower ratio of protein nitrogen to total nitrogen than in Korea.

• The Plant Pathology Journal
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• 제17권4호
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• pp.231-235
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• 2001

From April to May 1998, Phytophthora rot on pear, which has not been reported in Korea before, became an epidemic in the southeast part of the country under abnormally higher temperature and prolonged rainy days. Average temperature was about $3^{\circ}$ higher than in normal years, and 29 days were rainy during the 2 months in the areas surveyed. Over 1,000 orchards estimated at about 270 ha in 19 cultivation areas were infected by the disease, which occurred on all parts of the tree such as leaves, shoots, branches, stems, and flower clusters. Among 43 isolates collected from various locations and plant parts, 41 were identified as Phytophthora cactorum while 2 were identified as P. cambivora based on their mycological characteristics. The representative isolates revealed strong pathogenicity not only to pear but also to apple and peach. Among 23 pear cultivars tested, 7 were estimated as susceptible, 4 were moderate, and 11 were resistant to the pathogen. Results suggest that Phytophthora disease on pear is a potential threat to pear cultivation when environmental factors are favorable to disease development.

• 한국작물학회지
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• 제68권1호
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• pp.8-19
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• 2023

Adzuki beans have gained popularity in recent years due to their health benefits. Breeding of Adzuki beans is less favorable than with other legumes due to low genetic diversity. This study aimed to evaluate the genetic diversity of 252 adzuki bean germplasms from China, Japan, and Korea using 18 agro-morphological parameters and comparing their performance to three prominent Korean cultivars: Geomguseul, Arari, and Chungjupat. Leaf shape, pod color, and seed coat color were among the qualitative traits that showed wide variations. The quantitative variables also showed wide variations among adzuki bean germplasms. Although there was no significant difference (p < 0.05), the average rate of germination declined in the order of Korean (91.44%) > Chinese (91.31%) > Japanese (87.47%) adzuki beans. Chinese adzuki beans needed fewer days to flower (DF, 58.22 days) and days to mature (DM, 107.13 days), which varied significantly compared to the Korean and Japanese adzuki beans (p < 0.05). The average number of pods per plant (PPP) and one-hundred seeds weight (HSW) were higher in Japanese adzuki beans compared to the Korean and Chinese adzuki beans although the variation of each was not significant. Almost 29.76% of the accessions had early-blooming flowers, 3.97% were premature, 21.43% produced more PPP, and 3.97% yielded more SPP compared to control cultivars. Results of hierarchical cluster and principal component analyses revealed three clusters with significant variation in all quantitative variables except for RG (p < 0.05). The key factors in multivariate analyses were DF, DM, and HSW. Our study investigated the genetic diversity of adzuki bean accessions and identified ten early maturing and ten high PPP-yielding accessions. Our findings would help farmers and breeders to select the top-performing accessions that can provide them with various options.

• 생물환경조절학회지
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• 제7권2호
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• pp.109-115
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• 1998

본 실험은 꽃도라지의 고온기 육묘시 유묘의 저온처리기간에 따른 정식 후 생장과 개화반응을 조사하기 위하여 수행되었다. 본엽이 4매 전개된 유묘를 1$0^{\circ}C$의 인큐베이터에 각각 2, 3, 4, 5주 동안 저장하였다. 비교를 위해 저온저장하지 않은 식물체와 각각의 기간동안 저온처리된 식물체는 최저 야온 12~13$^{\circ}C$, 자연일장 조건의 유리온실에 정식하여 관리하였다 아즈마설과 아즈마훈 품종의 경우 경경과 엽수에서는 처리간 차이가 없었다. 그러나 초장 절간장 지상부 생체중 및 건물중은 4주동안의 처리구에서 현저하게 증가하였다. 두 품종 모두에서 4주 동안의 저온처리는 꽃의 무게와 직경의 크기를 증가시켰으며 개화소요일수도 무처리구와 2주 처리구에 비해 20일이 단축되었다. 아즈마조 품종의 지상부생육은 4주 동안의 저온처리구에서 증가되었으며 꽃의 품질도 향상할 수 있었다. 개화소요일수는 4주 동안의 저온처리구에서 무처리구보다 31일 2주 처리구보다는 36일이 단축되는 결과를 보였다. 실험 결과 꽃도라지 아즈마설, 아즈마혼, 아즈마조 품종의 고온기 육묘시 유묘의 최적 저장 조건은 1$0^{\circ}C$에서 4주간이었다

• 원예과학기술지
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• 제17권4호
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• pp.481-484
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• 1999

절화장미 'Cardinal'의 수확후 절화품질 및 수명연장에 미치는 키토산과 sucrose의 효과를 알아보고자 실시하였다. 절화의 수명은 키토산 5mg/L와 sucrose 3%를 혼용한 처리에서 대조구에 비해 3일간 연장되었고, 화경과 생체중도타 처리에 비하여 높게 유지되었다. 꽃목굽음현상은 키토산 2mg/L와 5mg/L에 3%의 sucrose를 혼용으로 처리시 2~3일 늦게 진행되었다. 흡수량은 sucrose 3% 처리시 완만하게 감소되었다.