Change of Fruit Characteristics and Prediction of Soluble Solids Content of Ripe Fruit of 'Jecy Gold' Kiwifruit(Actinidia chinensis Planch.)
2018
Lim, C.K., NIHHS, RDA, Jeju, Republic of Korea | Kim, S.C., NIHHS, RDA, Jeju, Republic of Korea | Moon, D.G., NIHHS, RDA, Jeju, Republic of Korea | Kim, C.H., NIHHS, RDA, Jeju, Republic of Korea | Song, S.Y., NIHHS, RDA, Jeju, Republic of Korea | Song, K.J., Jeju National University, Jeju, Republic of Korea
The purpose of this study was to develop a method predicting ripe fruit quality and harvest time of 'Jecy Gold' kiwifruit. This study was conducted with 4-year-old trees trained into overhead arbor vine in a non-heated green house from 2011 to 2013. The growth and development stages of fruit were expressed with day after anthesis(DAA) and biologische bundtalt, bundessortenamt, chemische industrie(BBCH) scale. The fruit enlargement phase of 'Jecy Gold' was at BBCH 70~78 (DAA 10~110) and the maturation phase was at BBCH 80 (DAA 140). The soluble solids content was increased rapidly at BBCH 83 (DAA 160) and the flesh was softened at BBCH 87 (DAA 190). The fruit senescence was occurred at BBCH 90 (DAA 210). Therefore the optimum harvest time seems to be at BBCH 83 (DAA 160). The dry matter content (DM) increased as fruit mature. Also soluble solids content (SSC) after ripening was correlated with the fruit maturity at harvest time. That is, the correlation equation between DM of unripe fruit and SSC after ripening was SSC after ripening(y)=1.1841?DM before ripening(x)-3.5244(R²=0.9338). As a result of linear regression analysis using estimated and predicted values, a correlation coefficient was 0.86. Therefore, we suggest that the soluble solids content of ripe fruit could be predicted by using the dry matter at harvest time.
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