Effect of Different Degrees of Local Defoliation in ‘Fuyu’ Persimmon on Fruit and Tree Development in the Current and Following Years

서지정보

· 발행기관 : 한국원예학회
· 수록지 정보 : Horticulture, Environment, and Biotechnology / 50권 / 2호 / 74 ~ 78페이지
· 저자명 : 최성태, 박두상, 조용조, 강성모

초록

When typhoons sweep over a persimmon orchard, the trees often lose their leaves in isolated parts of the crown. Six-year-old ‘Fuyu’ trees were defoliated on September 13 in units of the current shoots, 1-year-old branches, and 4-year-old scaffolds to mimic this situation. The fruits borne on the defoliated shoots and 1-year-old branches continued to increase their size with no significant deterioration of color and firmness at harvest. However, the fruits on defoliated 4-year-old scaffolds were about 10% smaller and their soluble solids were 1.8°Brix lower compared with those of the control. Soluble sugars in the defoliated shoots and 1-year-old branches increased from September 13 to November 22; however, the increase was significantly low in the shoots and 1-year-old branches of the defoliated 4-year-old scaffolds. A significant starch reduction in the shoots and 1-year-old branches was observed only in defoliated 4-year-old scaffolds. Percent of the shoots cold-damaged during the winter increased as the unit of defoliation was larger. However, new shoot growth and number of flower buds in a 1-year-old branch in the following year, as well as the characteristics of the fruits at harvest, were not significantly affected by the different degrees of local defoliation in the previous year.

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