편평태선 환자에서 수술후 발생한 비대형 편평태선

김홍림,서현이,김경호,안지영,박미연,윤재일 대한피부과학회 2017 대한피부과학회지 Vol.55 No.4

The Effect of Soil Texture on Fruits and Growth Properties in Rabbiteye Blueberries

김홍림,곽용범,이모희,채원병,허윤영,김진국 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.6

This study was conducted to compare the plant growth and fruit quality of blueberries grown in different soil textures of Korea, in order to utilize the results for stable production and soil improvement. Rabbiteye blueberry cultivars ‘Tifblue’ and ‘Baldwin’ were planted and grown for three years from 2013 in wagner pot (1 2000 a-1) in a greenhouse of Namhae Sub-station, Institute of Horticultural and Herbal Science. The plants were grown in four soil textures, sand, sandy loam, loam and silt loam, and nutrient uptake and growth characteristics of plants were investigated. Leaf nitrogen and phosphorus contents of two cultivars grown in different soil textures ranged between 8.6 to 10.5 g kg-1, which was lower than appropriate level for rabbiteye blueberry. However, the contents of potassium, calcium and magnesium in leaves were appropriate levels as 2.29~3.62 g kg-1, 4.46~5.46 g kg-1 and 1.45~2.12 g kg-1, respectively. Nitrogen and phosphate contents in leaves were higher in the two cultivars grown in silt loam soil. There was no significant difference in plant volume and root dry weight among four soil textures in two cultivars. However, dry weight of leaves and branches were highest in loam soil. Fruit production was highest in loam and silt loam soil in two cultivars, showing negative correlation with the amount of sand in soil. However, sugar and acidity showed no correlation with sand content in soil. These results show the limit to the blueberry growth in soil that has no nutrient holding capacity; however, most of Korean soils that have good nutrient holding capacity can produce competitive fruits if the drainage is improved.

국내 키위 주산지 토양 및 엽 화학성과 과실 특성

김홍림,이목희,정경호 한국환경농학회 2022 한국환경농학회지 Vol.41 No.3

BACKGROUND: Kiwifruit is a fruit tree with relatively small cultivation area in Korea and researches on its soil and physiology are very limited compared to those on cul-tivar development. Therefore, there are limited in-formation for farmers to cope with the reduction in pro-ductivity due to various physiological disorders and pre-mature aging. This study was conducted to investigate the soil and leaf chemical properties, and fruit characteristics, which will be used as basic data for stable kiwifruit or-chard soil management. METHODS AND RESULTS: The soil and leaf chemical properties, and fruit characteristics were investigated for two years in 16 kiwifruit orchards growing ‘Hayward’ (Actinidia deliciosa) in Jeollanam-do and Gyeongsangnam- do. Soil and leaf samples were collected in July and fruit quality was investigated by harvesting fruits about 170 days after full bloom. The average soil chemical proper-ties of kiwi orchards were generally higher than the rec-ommended level, except for pH, and especially, the ex-changeable potassium reached about 300% of the recom-mended level. The proportions of orchards that exceeded the recommended level of soil chemical properties were 63, 31, 100, 69, 94, 88 and 69% for pH, EC, organic con-tent, available phosphate, and exchangeable potassium, calcium and magnesium, respectively. Thirty-three per-cent of orchards had more than 100 mg/kg of nitrate nitro-gen in soil. Available phosphate in soil showed a sig-nificantly positive correlation with leaf nitrogen, phos-phoric acid and calcium content, but showed a sig-nificantly negative correlation with leaf potassium content. The magnesium content in the leaves was sig-nificantly correlated with soil pH. The highest fruit weight was observed in about 25 g/kg of leaf nitrogen content which could be attained when plants were grown on the soil containing about 100 mg/kg of nitrate nitrogen content. The average soluble solids content among 16 orchards was 9.58 °Brix at harvest and 13.9 °Brix after ripening, which increased about 45%, and the average fruit weight was about 110 g. CONCLUSION(S): For fruit quality, fruit soluble solids (sugar compounds) content was significantly correlated with leaf potassium content, fruit hardiness with leaf total nitrate, calcium and magnesium, and fruit titratable acid-ity with leaf magnesium; however, leaf calcium and mag-nesium negatively affect the soluble solids contents in fruits. .

블루베리 인력적화 시기와 방법이 과실특성에 미치는 영향

김홍림,채원병,김진국,이목희,이한철,김승희,곽용범 한국환경농학회 2019 한국환경농학회지 Vol.38 No.3

BACKGROUND: Increase in the ratio of small berries in blueberry production decreases the farmers’ profits due to weakening market competitiveness and lowering harvest efficiency. One of the reasons for increased small berries is over fruit-load. For improving productivity and competitiveness of blueberry in Korea, hand-thinning can be applied to increase fruit quality before the developing adequate chemical thinning methods. This study was conducted to investigate the proper timing and methods for floral buds thinning in rabbiteye blueberry. METHODS AND RESULTS: Eight years old bushes of rabbiteye bluberries ‘Brightwell’ as a primary cultivar and ‘Powderblue’ as a pollinizer were used for this study. Fruit size distribution by leaf-to-fruit ratio was investigated by counting the number of leaves and fruits in canes of 127 ‘Brightwell’ plants whose fruit set varied. Fifty percent of flowers/floral buds were removed in four different floral buds stages such as bud swell, late pink bud, full bloom, and petal fall, and the consumed time for thinning and fruit characteristics were recorded to investigate the effect and proper timing of floral buds thinning. Fruit weight and soluble solids content tended to increase in proportion to leaf-to-fruit ratio and the production of the number of fruits less than 13 mm in diameter decreased when leaf-to-fruit ratio was more than 2.5. Manual floral buds thinning by hands was fastest in full bloom stage and slowest in bud swelling stage. In all cultivars, fruit size was significantly smaller in non-thinning treatment than thinning, and there was, however, no significant difference in total fruit yield. The number of fruits less than 13 mm in diameter increased in both cultivars as floral buds thinning was delayed. Consumed time for picking 90% berries out of total berries per bush was shortest in full bloom stage thinning in ‘Brightwell’ and bud swelling, full bloom thinning in ‘Powderblue’. These were 25 and 20 days faster than no thinning, respectively. CONCLUSION: Although the effect of floral buds thinning varied depending on the cultivars, our results confirmed that floral buds thinning was effective for the early intensive harvesting and the increase of the large fruit ratio and the harvesting productivity. Also, in order to increase thinning efficiency, it is recommended to remove the flower buds before the full bloom stage.

품종에 따른 키위나무 눈과 가지의 내한성 비교

김홍림,채원병,김진국,이목희,이한철,김승희,곽용범,Kim, H.L.,Chae, W.B.,Kim, J.G.,Lee, M.H.,Rhee, H.C.,Kim, S.H.,Kwack, Y.B. 국립한국농수산대학교 교육개발센터 2019 현장농업연구지 = Journal of practical agricultural resear Vol.21 No.1

In Korea kiwifruit growing area is limited to southern coastal region and Jeju island, partly due to the lack of information on their cold hardiness in winter. This study was carried out to investigate cold hardiness of Korean kiwifruit cultivars in a period of dormancy for using it as preliminary data to expand the cultivation area of kiwifruit in Korea. A total of five kiwifruit cultivars in two species and hybrid, Actinidia deliciosa ('Hayward' and 'Garmrok'), A. chinensis ('Goldone') and A. arguta hybrid ('Bangwoori' and 'Skinny Green') were subjected to five freezing treatments of -12℃, -15℃, -18℃, -21℃ and -24℃. Cell membrane damage in all cultivars initiated in -18℃/32h and cell membrane stability was lost in -24℃ in most cultivars, except for 'Skinny Green'. Cold hardiness was estimated by 50% lethal temperature (LT₅₀) which was determined by triphenyl tetrazolium chloride (TTC) reduction. In branches, LT₅₀ was -15℃ in 'Hayward' and 'Garmrok', -18℃ in 'Bangwoori' and -21℃ in 'Goldone.' The LT₅₀ of buds on 'Hayward' and 'Garmrok' was 56 and 42 hours in -15℃ and 4 and 11 hours in -18℃, respectively; however, LT₅₀ of buds on 'Goldone' was 51 hours in -18℃ and that on 'Bangwoori' was 3 hours in -24℃. Cold hardiness results imply that it may be difficult for cultivars in A. deliciosa such as 'Hayward' and 'Garmrok' to be grown in the north of southern coastal region in Korea; however, it can be possible for several cultivars in A. chinensis and A. arguta hybrid to be grown in the northern part of Korean kiwifruit belt if cold tolerance in the thaw is confirmed.

시로미의 숙지삽목 증식 및 초기생장 특성

김홍림(Kim, Hong-Lim),김찬수(Kim, Chan-Soo),고석찬(Koh, Seok-Chan),고정군(Koh, Jung-Goon) 한국자원식물학회 2006 한국자원식물학회지 Vol.19 No.4

본 연구는 한라산의 대표적인 극지성 고산식물인 시로미의 현지내외 보존을 위한 기초 연구로서 증식체계를 마련하고 저지대에서 생장특성을 밝히고자 삽목조건 및 초기생육 특성 등을 알아보았다. 숙지삽시 식물호르몬의 처리나 상토의 조건에 따라 발근이나 생장 등이 다소 차이를 보였다. NAA 100 mg/l 또는 500 mg/l를 처리한 경우 생존율, 발근율 및 뿌리의 생장 등이 가장 양호할 뿐만 아니라 뿌리의 수도 많고 신초생장도 비교적 양호하여 시로미의 삽목증식을 위한 적정한 처리인 것으로 나타났다. 시로미 삽목묘를 노지에 옮겨서 키웠을 때에는 2개월 후부터 고사가 이루어지기 시작하여 7개월 후에는 26.7%가 고사한 것으로 나타났다. 이에 반해 차광처리를 하면 고사율이 낮아 91.1~94.4%가 생존하는 것으로 나타나 차광처리가 시로미의 생존율을 높이는데 효과적인 것으로 나타났다. 그리고 온실에서는 차광처리에 관계없이 생존율이 전체적으로 95.6~97.8%로 높게 나타났다. 그리고 생육장소 및 차광처리별 시로미의 평균 생장량은 노지와 온실에서 많은 차이를 보였다. 특히, 차광처리를 했을 때 상대적으로 높은 생장량을 보였는데 이는 차광처리가 상대습도를 높이고 광량을 낮추는 효과에 기인한 것으로 판단된다. Hardwood cutting propagation and early growth characteristics were investigated in order to develop the method of cutting propagation and to find out growth characteristics in the low altitude for in situ and ex situ conservation of Empetrum nigrum var. japonicum K. Koch, which is typical arctic alpine plants on Mt. Halla. The growth of roots and shoots was different depending on hormone concentrations or soil conditions. The survival rate, rooting rate, root growth, number of root and shoot growth increased with treatment of 100 mg/l or 500 mg/l NAA. Consequently, optimum condition of hardwood cutting was at treatment with 100 mg/l or 500 mg/l NAA. When plantlets from hardwood cuttings were exposed to the field condition, after 7 months survival rate was 73.3% without shading while 91.1~94.4% at shading conditions. In the green house, however, survival rate of plantlets were 95.6~97.8% without shading. The growth of plantlets was different depending on sites and shading conditions. Particularly, the best growth was obtained when the plantlets were grown in shading conditions. It indicates that relative humidity and light intensity are correlated with the growth in the low altitude area.

‘브라이트웰’래빗아이 블루베리의 Ammonium thiosulfate와 UREA처리에 따른 적화와 과실생장 효과

김홍림 ( Hong Lim Kim ),이목희 ( Mock-hee Lee ),이하경 ( Ha-kyoung Lee ),정경호 ( Kyeong-ho Chung ),이한철 ( Han-cheol Rhee ) 한국환경농학회 2020 한국환경농학회지 Vol.39 No.4

BACKGROUND: The productivity and quality of blueberry (Vaccinium ashei Reade) greatly depend on the number of fruits in a plant. Especially, fruit set more than appropriate number negatively affects productivity and marketability due to the increased number of small fruits and delayed harvest time. This study was conducted to investigate proper timing and concentration for applying chemical blossom thinners such as ammonium thiosulfate (ATS) and UREA. METHODS AND RESULTS: ATS at 1.25% and 1.50%, and UREA at 6% and 8% were applied in four developmental stages, bud swell, pink bud, full bloom and petal fall. Fruit thinning rate was calculated based on the number of fruits harvested divided by that of flowers before applying blossom thinners. Ratios of leaf to flower and leaf to fruit were calculated based on the number of fully developed leaves in 25 days after full blossom divided by that of flowers or fruits, respectively. Chemical injury of leaves was investigated by calculating the number of leaves with chemical injury divided by the total number of leaves. Fruit thinning rates were 48% and 66% for UREA treatments at 6% and 8%, respectively, and 49% and 62% for ATS treatments at 1.25% and 1.50%, respectively, in the full bloom stage. In the petal fall stage, fruit thinning rates were 18% and 24% for UREA treatments at 6% and 8%, respectively, and 49% and 35% for ATS treatments at 1.25% and 1.50%, respectively. Leaf to fruit ratio (L/FR) increased by 109% and 188% compared to leaf to flower ratio in ATS treatments at 1.25% and 1.50%, respectively, and L/FR increased 93 and 196% in UREA treatments at 6% and 8%, respectively, in the full bloom stage. In the petal fall stage, leaf to fruit ratio increased by 60% to 100% in ATS treatments, but did not significantly differ from the control in UREA treatments. Fruit harvest was delayed in all treatments of all developmental stages except for 1.5% ATS and 6% UREA treatments at the petal fall stage, whose fruit harvest was two or three days faster than the control. CONCLUSION: The application of ATS and UREA for blossom thinning should be in the petal fall and full bloom stages for early and late harvest, respectively. Considering chemical injury, integrated harvesting and fruit size, however, it is appropriate to apply ATS at 1.5% in the petal fall stage to increase fruit productivity and quality in blueberry.

질소 시비가 2년생 하이부쉬 블루베리의 생육특성에 미치는 영향

김홍림(Hong Lim Kim),곽용범(Yong-Bum Kwack),이재한(Jae Han Lee),최영하(Young-Hah Choi) 한국원예학회 2012 한국원예학회 학술발표요지 Vol.2012 No.5

래빗아이 블루베리 품종별 꽃눈의 내동성과 재배안전지역

김홍림 ( Hong Lim Kim ),곽용범 ( Yong Bum Kwack ),한점화 ( Jeom Hwa Han ),오필경 ( Pill Kyung Oh ),채원병 ( Won Byoung Chae ),김성철 ( Seong Cheol Kim ),김목종 ( Mok Jong Kim ),김진국 ( Jin Gook Kim ) 한국환경농학회 2014 한국환경농학회지 Vol.33 No.4

BACKGROUND: Rabbiteye blueberry(Vaccinium ashei) is one of the most widely grown blueberry types in the world, together with Northern and Southern highbush blueberry(Vaccinium corymbosum). Rabbiteye blueberry have higher soil adaptability and fruit productivity but less cold tolerance to low temperature than highbush blueberry. The objective of this study is to investigate freezing tolerance of floral buds and establish a cultivation zone for rabbiteye blueberry cultivars. METHODS AND RESULTS: Bearing branches which have similar thickness and same number of floral buds were collected in the early January at the blueberry germplasm preservation plot located in Namhae Sub-station, National Institute of Horticultural and Herbal Science in Gyeongsangnamdo. Cold response of bearing branches were investigated by electrolyte leakage and freezing tolerance of floral buds were determined by ovary browning ratio of 50%(LT50). Cultivation zone was established based on mean annualextreme minimum temperature for 30 years, from1981 to2010. The electrolyte leakage of bearing branches in rabbiteye blueberry increased as temperature decreased and was lowest in ‘Brightwell’ but highest in ‘Bluegem’ when they were kept in -5°C. Besides, the electrolyte leakage increased in ‘Brightblue’, ‘Brightwell’, ‘Climax’, ‘Delite’, ‘Gardenblue’, ‘Southland’ and ‘Woodard’ in -20°C. Freezing tolerance(LT50) was lowest in ‘Bluegem’ and ‘Homebell’(-13.3°C), and highest in ‘Tifblue’(-25°C) among different rabbiteye blueberry cultivars. LT50 of ‘Southland’ was from-15.0 to-16.7°C, that of ‘Delite’, ‘Brightwell’,’ Austin’ and ‘Climax’ was -18.3°C, and that of ‘Bluebelle’, ‘Woodard’ and ‘Powderblue’ was -20°C. CONCLUSION: This study indicate that The hardiness zones of rabbiteye blueberry were classified into Six cultivation zones and cultivation zones of most cultivars were the south of Jeollanam-do and Gyeongdangnam-do, except for ‘Tifblue.’

남부지역에서 남부하이부쉬 블루베리의 품종별 개화 및 과실특성

김홍림(Hong-Lim Kim),곽용범(Yong-Bum Kwack),최영하(Yong-Hae Choi) 한국원예학회 2011 한국원예학회 학술발표요지 Vol.2011 No.10