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KMID : 0903619890300030194
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Journal of the Korean Society for Horticultural Science
1989 Volume.30 No. 3 p.194 ~ p.199
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Effects of Bagging Materials and CaCl2 Spray on Fruit Calcium Concentration in Fruit - bagged Apple Trees
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Abstract
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This experiment was carried out to investigate the effects of bagging materials and CaCl₂ spray on fruit Ca concentration in fruit-bagged apple trees (Malus domestics Borkh.). No difference was noted in fruit Ca concentration among bagging materials during the growing season. And also, there was no difference in fruit Ca concentration between bagged and nonbagged fruits. The fruit flesh Ca concentration of bagged fruits was significantly lower than that of non-bagged fruits in the same tree, which 0.5% CaCl₂ was sprayed 5 times in the late growing season. The radioactivity of ^(45)Ca was highest in the sprayed shoot leaves and bark, while only a trace amount was detected in the fruit and shoot proximate to the treated shoot 3 weeks after 3 times application of ^(45)CaCl₂ (5 uCi/ml). As a result, it is confirmed that the Ca once accumulated in a specific part is hardly retranslocated. Therefore, it is concluded that Ca foliar spray to the fruit-bagged tree has no influence on Ca concentration in the fruit.
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