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Title:: Changes of Main Quality Indexes of Early Ripening Apple Cultivars (Strains) During the Ripening Process

Author(s):: LI Shijun; LI Jia; YIN Baoying; LI Zhongyong; ZHANG Xueying; XU Jizhong; (College of Horticulture,Hebei Agricultural University,Baoding,Hebei 071000)

Keywords:: early ripening apple; harvest date; starch index; quality indexes

Abstract:: The fruit firmness,soluble solid content,malic acid content,color parameters and ethene content changes of ‘XU25’‘XU27’‘XU32’‘Gala mutation’‘Mato 1’ and ‘Cinano Red’ during ripening process were studied in this study,to provide reference for suitable harvest time for early ripening apple.The results showed that the fruit firmness and malic acid content of different cultivar decreased while soluble solid content increased during ripening.Malic acid content levels of ‘Mato 1’ and ‘XU25’ was lower on the mature.Ethene content in fruits of ‘Mato 1’‘Gala mutation’ and ‘XU32’ reached the peak on 20th July,while it in the fruit of ‘XU25’‘XU27’ and ‘Cinano Red’ increased evidently on 25th July.The starch index of ‘XU25’‘XU27’‘XU32’‘Gala mutation’‘Mato 1’ and ‘Cinano Red’ at harvest were 3.7,4.7,4.2,5.8,3.5,4.8 in Baoding,respectively.In summary,it was initially determined that the harvesting period of earlymaturing apple varieties (lines) ‘XU25’‘XU27’ and ‘Cinano Red’ in the intermediate anvil ‘SH40’ in Baoding area was around July 25th.