부산대학교 도서관

본 연구는 노지 복숭아 과원에서 관수 개시점에 따른 복숭아 ‘천중도백도’의 수체 생육, 생리 반응 및 과실 품질과 생산성 변화를 분석하여 적정 관수 개시점을 구명하고자 수행하였다. 시험 재료는 전라북도 완주군에 위치한 국립원예특작과학원 내의 노지 복숭아 시험포(35°49′30.4″N, 127°01′ 33.2″E)에 재식된 7년생 ‘천중도백도’ [Prunus persica (L.) ‘Kawanakajima Hakuto’]를 사용하였으며, 2022년 6월부터9월까지 관수 개시점을 –20, –40, –60, –80kPa로 설정하였다. 주간부 단면적 증가량과 엽면적은 처리 간 통계적 유의차가 없었으나, 신초 길이와 두께는 –80kPa 및 –20kPa 처리구에서 감소하였다. 8월에 측정한 광합성률은 –60kPa(17.7 μmol·m-2·s-1), –40kPa(15.6μmol·m-2·s-1), –20kPa(14.5μmol· m-2·s-1), –80kPa(14.0μmol·m-2·s-1) 순으로 높았다. 5월과8월에 측정한 SPAD 값은 –60kPa 및 –40kPa 처리구보다–80kPa 및 –20kPa 처리구에서 낮았다. 수확기는 –20kPa 처리구가 다른 처리구와 비교하여 3일 빠르게 도달하였다. 과중은 –60kPa(379.1g), –40kPa(344.0g), –80kPa(321.0g), –20kPa(274.9g) 순으로 높았다. 경도는 –20kPa 처리구에서가장 낮았다. 가용성 고형물 함량은 –60kPa 처리구에서13.3°Bx로 가장 높았다. 상품과 비율은 –60kPa 처리구에서50.7%로 가장 높았고, –80kPa 처리구에서 23.4%로 가장 낮았다. 따라서 노지 복숭아 과원에서 관수 개시점을 –60kPa로 설정하는 것이 생산량 및 과실 품질을 향상시킬 수 있을 것으로 판단된다.
This study was conducted to determine the optimal irrigation starting point by analyzing tree growth, physiological responses, fruit quality, and productivity in peach orchards. Seven-year-old ‘Kawanakajima Hakuto’ peach trees were used in an experimental field (35°49′30.4″N, 127°01′33.2″E) located within the National Institute of Horticultural and Herbal Science located in Wanju-gun, Jeollabuk-do. The irrigation starting point was set with four levels of –20, –40, –60, and –80 kPa from June to September 2022. While there were no significant differences in increase of trunk cross-section area and leaf area among treatments, shoot length and diameter decreased in the –80 kPa and –20 kPa treatments. The photosynthetic rate measured in August was highest for –60 kPa (17.7 μmol·m-2·s-1), followed by –40 kPa (15.6 μmol·m-2·s-1), –20 kPa (14.5 μmol·m-2·s-1) and –80 kPa (14.0 μmol·m-2·s-1). SPAD value measured in May and August was lower in the –80 kPa and –20 kPa treatments than in the –60 kPa and –40 kPa treatments. The harvest date reached three days earlier in the –20 kPa treatment compared to other treatments. The fruit weight was highest in the –60 kPa (379.1 g), followed by –40 kPa (344.0 g), –80 kPa (321.0 g) and –20 kPa (274.9 g). Firmness was the lowest in the –20 kPa treatment. The soluble solid content was highest in the –60 kPa treatment (13.3°Bx).The ratio of marketable fruits was highest in the –60 kPa treatment (50.7%) and lowest in the –80 kPa treatment (23.4%). In conclusion, we suggest that setting the irrigation starting point at –60 kPa could improve the fruit quality and yield in peach orchards.