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봉지종류 및 괘대시기가 ‘원황’ 및 ‘화산’ 배 과실의 수확기 품질에 미치는 영향
정억근,이욱용,안영직,이혁재,황용수,천종필 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2
We tested fruits quality and skin coloration of two pear cultivar ‘Wonhwang’ and ‘Whasan’ produced by bagging with different kinds of paper bags in the Cheonan area, Chungnam Province, Korea. The fruits were bagged at 35, 45, 55 or 65 days after full bloom (DAFB) with 3 kinds of double layer paper bag which consisted of grey color, yellow color and newspaper for outer layer. The great extent of light interruption was observed in grey colored outer paperbag among three kinds of paperbag which showed only 0.46% of lowest light transmittance when compared with 43.7% and 40.0% of yellow paper and newspaper, respectively. The development of skin redness (a*) increased with the delay of bagging time in two pear cultivars. But the fruits treated at 65 DAFB showed uneven coloration and excessive development of redness which represented low fruit external appearance value. Uniform flesh firmness was attained at the fruits bagged with grey outer color paperbag regardless of bagging time, although the fruit quality indices including soluble solids and titratable acidity did not change significantly by using different kind of fruit bags and bagging time in two pear cultivar. Based on our results, it was explained that the grey-colored fruit bag had positive effect on the development of skin coloration without any detrimental effect on fruit quality factors in ‘Wonhwang’ and ‘Whasan’ pears.
조생종 ‘한아름’ 및 중생종 ‘신고’ 배의 적화처리에 따른 과실 비대 및 품질 비교
이욱용(Ug-Yong Lee),김윤경(Yoon-Kyoung Kim),신일섭(Il-Sheob Shin),오광석(Kwang-Suk Oh),정억근(Ok-Kun Jung),천종필(Jong-Pil Chun) 한국원예학회 2015 원예과학기술지 Vol.33 No.4
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, 7번화제거구(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°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. In this study, we evaluated the differences in fruit development and quality indices of fruits subjected to blossom thinning before full bloom in ‘Hanareum’ and ‘Niitaka’ pears (Pyrus pyrifolia Nakai). We carried out a thinning treatments at 5 days before full bloom, targeting the blossoms at the 1st and 2nd position (T1) or the blossoms at the 6th and 7th position (T2) from the basal part of the flower cluster in both cultivars. Blossom thinning treatments increased the average fruit weight of early-season Asian pear ‘Hanareum’ up to 10.5% (T1) and 11.0% (T2) at harvest time (110 days after full bloom). The mid-season ‘Niitaka’ pear showed increased fruit weight of up to 12.6% (T1) and 16.8% (T2) at harvest time (170 days after full bloom). Moreover, these treatments increased the production rate of bigger sized fruits in both cultivars. Removal of blooms also affected fruit quality indices; the bloom-thinned fruits showed higher soluble solids contents (about 1oBrix) and higher skin color redness (a*) especially in ‘Niitaka’ pears when compared to the non-thinned controls. Overall, the treatments increased the fruit size and weight as well as fruit quality including soluble solids and skin color. Bloom thinning treatment targeting the 6th to 7th blossom from the basal part of the flower cluster may be recommended as the practical thinning method in Asian pear ‘Hanareum’ and ‘Niitaka’.