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인공수분시 꽃가루 현탁에 따른 '후지' 사과의 착과 및 과실품질에 미치는 영향
유진기,강인규,Yoo, Jingi,Kang, In-Kyu 경북대학교 농업과학기술연구소 2014 慶北大農學誌 Vol.32 No.4
본 연구는 액체에 현탁한 화분을 이용한 인공수분방법이 농촌의 노동력 절감과 '후지' 사과의 결실 및 과실품질에 미치는 영향을 구명하고자 실시하였다. 액체현탁화분의 화분발아율은 6시간 경과시까지 fructose 20% 용액에서 화분발아율을 20%수준으로 다른 용액에 비하여 낮은 발아율 유지하여 화분을 안정적으로 보존해 주었다. 인공수분 처리에 따른 정화아의 중심과 착과는 화분현탁액 65 g (/20 L), 무처리, 면봉 및 인공수분기(러브터치) 처리구들이 정상적인 결실을 보였다. 수확시 과실품질은 과형지수, 경도, 가용성 고형물 함량 및 산함량은 차이를 나타내지 않았다. 노동력절감은 액체현탁화분 처리가 면봉처리에 비하여 3.56배 감소한 결과를 보여 경영비를 줄이는데 우수한 효과를 보였다. This study investigated the effects of using a pollen suspension for artificial pollination on the labor costs, fruit set, and fruit quality attributes of 'Fuji' apples. The pollen germination rate was 20% in a 20% fructose solution after 6 hours, and the pollen remained stable for 6 hours in the same solution. The king fruit per flower cluster exhibited a normal fruit set, regardless of the treatment. Plus, none of the artificial pollination applications affected the fruit length/diameter ratio, flesh firmness, soluble solids concentration, or titratable acidity in the harvested 'Fuji' apple fruits. However, the labor savings were significantly higher with the pollen suspension treatment when compared with the cotton swab or love-touch. Therefore, the labor cost was four-fold less in use of pollen suspension than in use of cotton swab for artificial pollination.
국내 육성 사과품종들의 전분지수를 통한 과실 성숙기 예측
유진기(Jingi Yoo),권중근(Jung-Geun Kwon),강인규(In-Kyu Kang) 한국원예학회 2023 원예과학기술지 Vol.41 No.1
This study was conducted to evaluate the starch loss pattern and to estimate the maturity indices and harvest time of the five Korean apple cultivars (‘RubyS’, ‘Arisoo’, ‘Hwangok’, ‘Picnic’, and ‘Colorpple’) in association with the changes of fruit quality attributes using a Cornell starch pattern index (SPI) analysis method (1-8 scores) and SPI chart development for domestic use. In 5 apple cultivars, the increase in SPI was directly related with the increase in fruit weight and soluble solids content and the decrease in flesh firmness and titratable acidity. For fruit peel coloration, the decrease in L<SUP>*</SUP> (indicator for brightness) and b<SUP>*</SUP> (indicator for yellowness) was strongly associated with the increase in SPI. In addition, the increase in a<SUP>*</SUP> (indicator for redness) was associated with the increase in SPI in all apple cultivars, except ‘Hwangok’, a yellow apple cultivar. A slight increase in internal ethylene concentration was also observed in all cultivars while the SPI was increased. Interestingly, the changes of SPI were different depending on each apple cultivar. Averagely, ‘RubyS’, ‘Arisoo’, ‘Hwangok’, and ‘Picnic’ apples took 3, 4, 5, and 7 days, and 7, 5, 7, and 7 days to change the SPI from 6 to 7 and from 7 to 8 scores, respectively. However, ‘Colorpple’ apple took about 10 days each to change the SPI from 6 to 7 and from 7 to 8 scores. Therefore, this study suggested that the development of SPI chart could be used as basic data to estimate the fruit maturity and harvest time of domestic apple cultivars.