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Effects of fruit bags and bagging time on fruit quality indices at harvest time in 'Wonhwang' and 'Whasan' pears

봉지종류 및 괘대시기가 '원황' 및 '화산' 배 과실의 수확기 품질에 미치는 영향

  • Jung, Ok-Kun (Cheonan-Si Agricultural Development & Technology Center) ;
  • Lee, Ug-Yong (Department of Horticulture, Chungnam National University) ;
  • Ahn, Young-Jik (Foundation of University-Industry Research Collaboration, Paichai University) ;
  • Lee, Hyuk-Jae (Cheonan-Si Agricultural Development & Technology Center) ;
  • Hwang, Yong-Soo (Department of Horticulture, Chungnam National University) ;
  • Chun, Jong-Pil (Department of Horticulture, Chungnam National University)
  • Received : 2013.05.03
  • Accepted : 2013.06.11
  • Published : 2013.06.30

Abstract

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.

충남 천안지역에 재배되고 있는 국내신육성 조중생종 배 '원황' 및 '화산'을 공시하여 외지의 색깔을 달리한 3종의 이중봉지를 만개 후 35-65일까지 10일 간격으로 괘대한 후 수확기에 과실을 수확하여 색택 및 과실품질을 비교하였다. 봉지간 광차단율을 조사한 결과, 회색외지를 사용한 과실의 광차단율이 유의하게 높아 광투과율이 0.46%로 황색외지의 43.7% 및 신문지의 40.0%에 비해 높은 것으로 나타났다. 두 품종 모두 괘대시기가 늦을수록 적색도($a^*$)이 증가하는 경향을 보였으나 괘대 시기가 만개 후 65일로 늦은 경우에는 과피가 지나치게 붉은색으로 착색되거나 착색의 균일도가 떨어져 외관이 심하게 떨어졌다. 과실의 수확기 가용성고형물, 산함량 등 품질요인은 봉지종류 및 괘대시기에 따라 큰 차이를 보이지 않았으나 회색외지 처리과실의 수확기 경도편차가 가장 적게 조사되었다. 본 실험결과, 회색외지를 사용한 경우 과실품질요인의 저하 없이 '원황'과 '화산' 배 과실의 과피색 발현에 유리한 결과를 보였다.

Keywords

References

  1. Ahn YJ, Choi JS, Moon BY, Chun JP. 2009. Bagging of Ca-coated bag affects calcium content and physiological changes in 'Niitaka' pear fruits. Korean Journal of Horticultural Science and Technology 27:540-546.
  2. Han JW, Lee HJ, Jang HI, Hong KH, Choi JJ, Kim KY, Guh JO. 1999. Comparison of skin characteristics between non-bagged and bagged 'Hosui' pear (Pyrus pyrifolia Nakai) fruits. Journal of Korean Society for Horticultural Science 40:439-442.
  3. Hong SS, Hong YP, Im BS, Jeong DS, Shin IS. 2004. Influence of picking stage and storage type on the fruit respiration change and panel test in 'Wonhwang', 'Hwasan', and 'Mansoo' pear. Korean Journal of Horticultural Science and Technology 22:55-62.
  4. Hong KH, Kim LK, Jang HI, Choi JH, Han JH, Kim KY. 1999. Effect of paper sources for bagging on the appearance of fruit skin in oriental pears (Pyrus pyrifolia Nakai cvs. Gamcheonbae and Yeongsanbae). Journal of Korean Society for Horticultural Science 40:554-558.
  5. Kim YK, Choi JJ, Lee JS, Choi JH, Jeong SB, Lee SH, Jung UK. 2008. Effects of bagging with various paper bags on fruit quality in 'Whasan'. Korean Journal of Horticultural Science and Technology Suppl. I. p. 58.
  6. Kim YK, Kang SS, Cho KS, Jeong SB. 2010. Effects of bagging with different pear paper bags on the color of fruit skin and quality in 'Manpungbae'. Korean Journal of Horticultural Science and Technology 28:36-40.
  7. Kim YK, Kang SS, Cho KS, Kim MS, Jeong SB, Son DS. 2007. Determination of optimum harvest time for 'Hwasan' (Pyrus pyrifolia Nakai) on the premise of the shelf life at ambient temperature. Korean Journal of Horticultural Science and Technology 25:360-363.
  8. Kim JB, Kang SJ, Son DS, Seo HS, Cho KS, Choi JJ, Choi JH, Han JH, Kang SS, Shin IS. 2002. Selection guide for pear cultivar. Naesaranguribae, Korea.
  9. Lee UY, Chun JP. 2011. Evaluation of quality indices during fruit development and ripening in 'Wonhwang' and 'Whasan' pears. CNU Journal of Agricultural Science 38:405-411.
  10. Moon BW, Yun MS, An YJ, Lee JC. 2003. Effects of bagging with calcium treated paperbag on calcium contents and quality in 'Niitaka' pear fruit. Journal of Korean Society for Horticultural Science 44:349-352.
  11. Oh KY, Lee UY, Moon SJ, Kim YO, Yook HS. Hwang YS, Chun JP. 2010. Transportation and distribution temperatures affect fruit quality and physiological disorders in 'Wonhwang' pears. Korean Journal of Horticultural Science and Technology 28:434-441.
  12. Park HS, Lim HT, Park YM. 1994. Effect of fruit maturiy on the quality of 'Tsugaru' apples during cold storage and simulated marketing. Journal of Korean Society for Horticultural Science 35:593-598.