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꽃잎 및 꽃받침 제거가 딸기의 과형 변화 및 품질에 미치는 영향
이규빈 ( Gyu-bin Lee ),최윤의 ( Yun-ui Choe ),박은지 ( Eun-ji Park ),박영훈 ( Young-hoon Park ),최영환 ( Young-whan Choi ),강남준 ( Nam-jun Kang ),강점순 ( Jum-soon Kang ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.1
In the present study, we investigated the effects of artificial removal of corolla and calyx lobes from open flowers on fruit development and fruit quality of strawberry (Fragaria × ananassa Duch.). Removing the corolla had no significant effect on fruit weight, hardness, length, and diameter, Hunter L, a, b values, sugar content and acidity. However, removing the calyx lobes significantly inhibited longitudinal and transverse growth of the fruits, resulting in diminished fruit size. In addition, merchantable fruit quality significantly decreased upon removing the calyx lobes, and this tendency was increased as more calyx lobes were removed. Nonetheless, removal of the calyx lobes had no effects on fruit color, sugar content, or acidity, similar to the effect of corolla removal.
이상 저온조건이 딸기의 생육, 수량 및 생리활성 성분에 미치는 영향
이규빈 ( Gyu-bin Lee ),최윤의 ( Yun-ui Choe ),박은지 ( Eun-ji Park ),왕자옥 ( Ziyu Wang ),이매 ( Mei Li ),이커 ( Ke Li ),박영훈 ( Young-hoon Park ),최영환 ( Young-whan Choi ),강남준 ( Nam-jun Kang ),강점순 ( Jum-soon Kang ) 한국환경과학회 2017 한국환경과학회지 Vol.26 No.3
The present study aimed to investigate the effects of low temperature on the growth, yield, quality, and biologically active compounds of strawberry and obtain basic information for developing a technology for stable growth of strawberry in greenhouses. Growth of strawberry, including leaf number, area, and length, plant height, and dry weight was better at the optimum growth temperature of 20℃than at a lower temperature of 15℃. At the low temperature of 15℃, the cultivar `Maehyang` was more tolerant and displayed better growth rate than `Seolhyang`. At 15℃, the fruit production per week and fruit weight was lower than that at 20℃. In contrast, fruit length and diameter were not significantly different between the two growth temperatures. Growth temperature also did not affect the fruit color index, Hunter L, a, b value, or fruit firmness. However, the sugar content of strawberries grown at 15℃was higher by 0.8 and 1.5 Brix for `Seolhyang` and `Maehyang`, respectively, than of those grown at 20℃. There was no difference in the content of fisetin, a biologically active compound, for `Seolhyang` at both growth temperatures, however, the fisetin content of `Maehyang` was higher at 20℃ than at 15℃. Cinchonine and ellagic acid content of `Seolhyang` was higher at 20°C than at 15℃, whereas that of `Maehyang` was higher at 15℃ than at 20 . Quercetin content showed no significant differences with respect to growth temperature, however, it tended to increase at 20℃. The cinnamic acid content of `Seolhyang` was higher at 15℃ than at 20 , whereas that of `Maehyang` increased at 20℃. Collectively, the biologically active compounds of strawberry were affected by growth temperature. Moreover, the content of these compounds tended to increase at 20°C, the optimum growth temperature, rather than at the sub-optimal growth temperature of 15℃.
코이어 배지를 재활용한 혼합 상토가 배추 및 상추의 생육에 미치는 영향
이규빈 ( Gyu-bin Lee ),최윤의 ( Yun-ui Choe ),박은지 ( Eun-ji Park ),박영훈 ( Young-hoon Park ),최영환 ( Young-whan Choi ),손병구 ( Beung-gu Son ),강점순 ( Jum-soon Kang ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.11
This study investigated the applicability of horticultural media with recycled coir substrates the growth of Chinese cabbage (Brassica campestris L. ssp. Pekinensis) and lettuce (Lactuca sativa L.) crop. The six different types of coir based substrates were A, Coir 45: Perlite 35: Vermiculite 12: Zeolite 8 (%), B, Coir 55: Perlite 25: Vermiculite 12: Zeolite 8 (%), C, Coir 65: Perlite 15: Vermiculite 12: Zeolite 8 (%), D, Coir 75: Perlite 5: Vermiculite 12: Zeolite 8 (%), E, Coir 85: Perlite 5: Vermiculite 5: Zeolite 5 (%) and F, nursery media (control). The pH and Electric conductivity of the horticultural nursery media were 6.06-7.00 and 0.45-1.10 dS/m-1, respectively. The nursery media containing coir substrates had higher level of Total N, Ca, K, Mg and P than those without coir. Additionally, it was observed that the growth of Chinese cabbage was the best on D (containing 75% coir) while that of lettuce was the best on E (containing 85% coir). In general, when substrates containg a higher percentage of coir were used, the growth of Chinese cabbage and lettuce was ideal. Additionally, the P, Ca, and Mg content in both plants was not significantly altered by the amount of coir present in the media. However, with an increase in the amount of coir substrate, the chlorophyll, N, and K content was increased. After harvesting, there was no significant difference in the chemical properties of the horticultural nursery media of both plants. Thus, it can be suggested that, coir substrate after a single use could be recycled as horticulture nursery media.
수박종자의 Osmotic Priming 처리가 종자활력 및 유묘생장에 미치는 영향
박은지 ( Eun Ji Park ),이규빈 ( Gyu Bin Lee ),박영길 ( Young Gil Park ),최윤의 ( Yun Ui Choe ),강점순 ( Jum Soon Kang ) 한국환경과학회 2016 한국환경과학회지 Vol.25 No.4
In nine commercial watermelon cultivars, the effects of osmotic seed priming were evaluated for seed viability and seedling growth at different germination temperatures and field conditions. Generally, primed seeds showed improved germination rate and reduced time for emergence at different germination temperatures, as compared to untreated seeds. In particular, priming effect on seed germination was significantly high at 15℃, which is an environment normally resulting in poor germination. Depending on the watermelon cultivar, germination rate under low temperature (15℃) was improved by up to 15~66% in primed seeds, as compared to untreated seeds. However, priming effect on germination was gradually reduced as the temperature reached to its optimum level for seed germination. Seed priming tended to improve the viability, fresh weight, and dry weight of watermelon seedlings, but its effect on seedling stage was not large, as compared to untreated seeds. Primed watermelon seeds showed improved emergence rate and facilitated germination in the field, but their seedling growth after 30 days from germination was not significantly affected. Our results indicated that seed priming can greatly improve the seed germination at poor temperature conditions in the watermelon.
이상 고온 조건에서 지하수 냉방 처리가 딸기의 생육과 수량 및 품질에 미치는 영향
이규빈 ( Gyu-bin Lee ),이정은 ( Jung-eun Lee ),최윤의 ( Yun-ui Choe ),박영훈 ( Young-hoon Park ),최영환 ( Young-whan Choi ),강남준 ( Nam-jun Kang ),강점순 ( Jum-soon Kang ) 한국환경과학회 2018 한국환경과학회지 Vol.27 No.8
A Cultivation method to minimize the damage caused by high temperatures was studied by investigating the effects of groundwater cooling treatment on the growth, yield, and quality of strawberries. In the groundwater cooling treatment, the daily average temperature of the rhizosphere was reduced from 26.9°C to 24.9°C . The root length increased by 0.3-9.2 cm, depending on the cultivar and growth period. The leaf number, leaf area, leaf length, leaf diameter, and plant height also increased, especially in the cultivars ‘Seolhyang’ and ‘Maehyang’, resulting in higher fresh and dry weights. The number of fruit per plant increased from 7.7 to 12.5 in ‘Seolhyang’, and the fruit weight increased by 0.3 g in ‘Seolhyang’ and 1.3 g in ‘Maehyang’. The fruit hardness increased, but no significant difference in fruit coloration was observed. The sugar content of the fruit was improved by 0.2-0.3 °Brix. Therefore, groundwater cooling of the rhizosphere was effective in improving the growth and productivity of strawberries under abnormally high temperature conditions and can be considered a cost-efficient cooling system.