시기별 적엽이 저농약 ‘원황’배의 과실품질과 삽수의 기내 재생장에 미치는 영향 (Fruit Quality of ‘Wonhwang’ Pear Trees with Low-pesticides and In Vitro Regrowth of Stem Cuttings as Affected by Time of Defoliation)

서지정보

· 발행기관 : 한국유기농업학회
· 수록지 정보 : 한국유기농업학회지 / 23권 / 3호 / 469 ~ 480페이지
· 저자명 : 김병삼, 조경철, 마경철, 윤봉기, 정석규, 한점화, 최현석

초록

The study was conducted on the effects of time of defoliation on fruit quality of pear (Pyrus pyrifolia Nakai) trees, managing with low-pesticides, and regrowth of stem cuttings in vitro. Treatments included for 40% of uniform defoliation at early-August, end-August, and early-September, as well as control (no defoliation). Defoliation at early-September and control increased growth of water sprouts as well as concentrations of carbohydrates, total nitrogen, and free sugar in one-year old shoots. Defoliation at early-September and control increased fruit yield and mean fruit weight, with high soluble solids content and fruit surface color of a* observed for both defoliation at end-August and early-September. Defoliation at early-August increased rates of electrolyte leakage in stem cuttings at -18℃ in vitro. There were no significantly different for germination rates of the cuttings between the treatments at -18 and -21℃ in vitro, with the highest germination of the cuttings observed for defoliation at early-September and control at -27℃. Therefore, orchard management should be performed to be minimized for defoliation of the spur leaves until end-August, causing from precipitation and pests.

영어초록

The study was conducted on the effects of time of defoliation on fruit quality of pear (Pyrus pyrifolia Nakai) trees, managing with low-pesticides, and regrowth of stem cuttings in vitro. Treatments included for 40% of uniform defoliation at early-August, end-August, and early-September, as well as control (no defoliation). Defoliation at early-September and control increased growth of water sprouts as well as concentrations of carbohydrates, total nitrogen, and free sugar in one-year old shoots. Defoliation at early-September and control increased fruit yield and mean fruit weight, with high soluble solids content and fruit surface color of a* observed for both defoliation at end-August and early-September. Defoliation at early-August increased rates of electrolyte leakage in stem cuttings at -18℃ in vitro. There were no significantly different for germination rates of the cuttings between the treatments at -18 and -21℃ in vitro, with the highest germination of the cuttings observed for defoliation at early-September and control at -27℃. Therefore, orchard management should be performed to be minimized for defoliation of the spur leaves until end-August, causing from precipitation and pests.

참고자료

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