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논문 상세정보

Tree Responses of ‘Fuyu’ Persimmon to Different Degrees of Early Defoliation on Fruit Characteristics at Harvest and Tree Development the Next Season

Tree Responses of ‘Fuyu’ Persimmon to Different Degrees of Early Defoliation on Fruit Characteristics at Harvest and Tree Development the Next Season

Horticulture, Environment, and Biotechnology v.46 no.2 , 2005년, pp.136 - 139  
강성모, Seong-Tae Choi, Doo-Sang Park, Young-Whang Yoon
초록

This study was conducted to understand the responses of persimmon trees to early defoliation by typhoons. In 9- and 6-year-old Fuyu persimmon trees, 0 (control), 25, 50, and 75% of the leaves were defoliated on September 4 in 1998 and 0 (control), 75, and 100% on October 9 in 2002. Fruit fresh weight and soluble solids tended to decrease as defoliation percentages increased. However, fruit diameter continued to increase in the absence of any leaves, and a 50% defoliation in early September did not significantly affect fruit weight at harvest. Starch concentration in dormant shoots significantly decreased to 1.9% by 75% defoliation from 3.6% for the control in the 1998 experiment, and to 3.2 and 3.1% by 75 and 100% defoliation, respectively, from 4.0% for the control in the 2002 experiment. Shoot growth, number of flower buds, and fruit set the following year were not consistently affected by different degrees of defoliation the previous year. However, a 75% defoliation resulted in a 7.8- and 4.4-fold increase in winter-shoot mortality in 1999 and 2003, respectively. Although not significant, only fruit weight the following year tended to decrease with increasing degrees of defoliation in both experiments. Soluble solids were significantly low in the fruits of 75%- and 100%-defoliated trees in 2003, but not in 1999. The results indicated that measures to enhance fruit quality and carbohydrate reserve of the tree should be practiced after a severe defoliation by typhoons.

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