| Project/Area Number |
02304018
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
園芸・造園学
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| Research Institution | Okayama University |
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Principal Investigator |
NAKAMURA Reinosuke Okayama Univ.,Agr.,Prof., 農学部, 教授 (70021053)
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| Co-Investigator(Kenkyū-buntansha) |
MURATA Takao Shizuoka Univ.,Agr.,Prof., 農学部, 教授 (80022044)
AKIMOTO Koichi Gifu Univ.,Agr.,Prof., 農学部, 教授 (20021727)
CHACHIN Kazuo Univ.of Osaka Pref.,Agr.,Assoc.prof., 農学部, 助教授 (60081519)
TSUCHIDA Hironobu Kobe Univ.,Agr.,Prof., 農学部, 教授 (60031184)
INABA Akitsugu Okayama Univ.,Agr.,Prof., 農学部, 教授 (90046491)
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| Project Period (FY) |
1990 – 1991
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| Keywords | Fruit and vegetables / Precooling / Postharvest biotechnology in low temperature / Postharvest biotechnology in ambient temp / Postharvest biotechnology in constant temp / Packaging / Ethylene / Quality estimation |
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| Research Abstract |
1. Investigation on temperature and air constituents in cartons at distribution center. Temperature and air constituents in cartons of some fruit and vegetables were measured simultaneously at distribution center in Tokyo,Nagoya, Gifu,Osaka, Kobe and Okayama, twice from late August to early September. Although leafy and flower vegetables had been almost precooled, temperature of some vegetables arrived to distribution center were indicated nearly 10-20ﾟC, because of inadequate handling for keeping cool in transit. Air constituents in carton with polyethylene package showed 13-17% for oxygen and 3-10% for carbon dioxide.
2. Proper handling conditions proposed by statistical analysis of handling condition showed in literatures. Multiple regression analysis between keeping quality and temperature was carried out. It was showed to be able to estimate the proper handling temperature during storage in tomato fruit.
3. Basic studies for keeping quality in fruit and vegetables. Physiological effects of impact, temperature, air constituents and ethylene on keeping quality of fruit and vegetables were studied, and discused at standpoint of improvement for handling technology in practise.
4. Recommendation for improvement of postharvest biotechnology in Japan. From the results obtained above, some improvements for postharvest biotechnology in Japan were recommendated as follows: (1) Precooling temperature must be decided in relation to techniques for keeping cool in transit. (2) Mechanical stress including impact and vibration must be restricted. (3) Constant temperature in about 15ﾟC may be effective for keeping quality in case of handling at ambient temperature. (4) Control of air constituents with high carbon dioxide and low oxygen is effective for keeping quality. (5) Reduction of ethylene biosynthesis and removal of ethylene are effective for keeping quality. (6) Distribution system for fruit and vegetables required to be modified.
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