Analysis of Air Temperature Factors Related to Difference of Fruit Characteristics According to Cultivating Areas of Persimmon (Diospyros kaki Thunb.)
2008
Kim, H.C. (Wonkwang University, Iksan, Republic of Korea) | Jeon, K.S. (Wonkwang University, Iksan, Republic of Korea) | Kim, T.C. (Wonkwang University, Iksan, Republic of Korea), E-mail: [email protected]
To investigate main air temperature factors correlated to difference of fruit characteristics according to cultivating areas, fruit and air temperature characteristics of eight cultivating areas of 'Fuyu' persimmon were analyzed by principle components and multiple regression analysis. The first principal components extracted from 16 air temperature factors was annual mean temperature, mean temperature during October, annual mean minimum extreme temperature, mean temperature during growing period, and so forth. The second principal components was mean temperature during May and June and so forth. And cumulative contribution was 91.4%. The five of eight cultivating area had clearly the difference of main factors or the correlated direction among cultivating areas. In multiple regression analysis between the extracted main factors and fruit characteristics, fruit hight were highly correlated with mean temperature during growing period (X∧8) and cumulative temperature (X∧6), and the regression equation was Y = 150.55 - 5.375X∧8 + 0.014X∧6 (r²=0.843). Also this regression equation was affected by mean minimum temperature during growing period, cumulative temperature, and mean temperature during August. Fruit diameter was negatively correlated with mean temperature during growing period, flesh browning rate and Hunter a value of peel color were positively correlated with mean minimum temperature during growing period and annual minimum air temperature, respectively.
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