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사과 '후지'에서 유기 칼슘화합물의 수관살포가 과실의 무기성분 농도, 동녹 발생 및 과실 품질에 미치는 영향
문병우,이영철,정혜웅,Moon, Byung-Woo,Lee, Young-Cheul,Jung, Hae-Woong 국립한국농수산대학교 교육개발센터 2012 현장농업연구지 = Journal of practical agricultural resear Vol.14 No.1
The effects of organic calcium compounds (ACa) tree-spray for late growing stage on the mineral nutrition concentration of fruit, russet and quality in 'Fuji' apple were investigated. Optimum spray concentration of leaves by ACa tree-spray during late growth stage were ranged 125 times among 1,000 times. Also, Optimum concentration of fruits was effected to 125 times. Optimum spray times of leaves effected by ACa 500 times tree-spray during late growth stage were effective in one times (Sept. 25) and three times (Sept. 25, Oct. 5, 15). Also, Optimum times concentration of fruit skin was effected to one times (Sept. 25) and fruit flesh was effected two times (Sept. 25, Oct. 5) and three times (Sept. 25, Oct. 5, 15). Phytotoxicity by tree-spray of ACa concentration and times different not occur to leaf and fruit.
칼슘 결핍에 의한 “신고”배 (Pyrus pyrifolia cv. Niitaka) 과실에서의 바람들이
문병우 ( Byung Woo Moon ),정혜웅 ( Hae Woong Jung ),이희재 ( Hee Jae Lee ),유덕준 ( Duk Jun Yu ) 한국환경농학회 2013 한국환경농학회지 Vol.32 No.2
BACKGROUND: Pithy pear fruit are not distinguished externally from sound fruit and thus often cause unexpected economic losses. To find out the cause of pithiness, the pithiness incidence and characteristics of Japanese pear (Pyrus pyrifolia cv. Niitaka) fruit picked from a spot frequently produced pithy fruit in an orchard were compared with those of fruit picked from another spot produced sound fruit every year. And the soil chemical properties of the two spots and mineral contents in fruit, shoots, and leaves of Japanese pear trees cultivated in the two spots were also examined. METHODS AND RESULTS: The pithiness incidence was 0, 8.8, and 11.3% at 7 days before and 0 and 7 days after optimal harvest date, respectively, in the spot frequently produced pithy fruit. Flesh firmness was significantly lower in pithy fruit than in sound fruit, while soluble solids content was slightly higher in pithy fruit than in sound fruit. Unlike other mineral contents, Ca content was significantly lower in pithy fruit than in sound fruit. These results indicate that Ca deficiency in fruit is closely associated with decrease in flesh firmness and thus pithiness development. Ca content in soil of the spot frequently produced pithy fruit was also significantly lower than that in soil of the spot produced sound fruit. However, shoots or leaves did not exhibit significant difference in Ca and/or other mineral contents between the two spots, indicating that Ca deficiency in fruit is dependent on the translocation of Ca within a plant rather than soil Ca status. Although total-N, available P2O5, K, and Ca contents were significantly lower in soil of the spot frequently produced pithy fruit than in soil of the spot produced sound fruit, Mg and Na contents and pH were not different between the soil conditions. CONCLUSION(S): Fruit maturity and Ca level in fruit are closely related to the incidence of pithiness in ``Niitaka`` Japanese pear.
4년생 Fuji 사과나무의 하수형 재배시 적엽처리 효과
상혜영 ( Hye Young Sang ),이재영 ( Jae Young Lee ),정혜웅 ( Hae Woong Jung ),박희승 ( Hee Seung Park ) 한국녹지환경디자인학회 2005 녹지환경학회지 Vol.1 No.2
A series of experiments were conducted to observe defoliating effect on fruit quality in 4-year-old `Fuji`/M.9 apple trees. The degree and the applying time of defoliation did not alter the amount of light penetration and anthocyanin content in 4-year-old `Fuji` apple trees. Defoliation increased fruit diameter as it performed at 20 days before harvesting for `Fuji` apple trees. But, defoliation little affected to deciding factors of fruit quality including Brix degree, titratable acidity, and flesh firmness, which was caused from the complex conditions of their younger tree age and better light conditions.