아미노산 액상비료와 proline처리가 ‘후지’ 사과나무 개화기 저온피해 및 과실품질에 미치는 영향

Abstract

This study was conducted to analyze the effects of amino acid liquid fertilizer (ALF) and proline (Pro) treatment on frost damage during the flowering period, as well as on tree growth and fruit quality of ’Fuji’ apple trees. When the ALF + Pro treatment was applied before flowering, the number of fruits per flower cluster in the untreat group was less than 2.0 for both terminal and axillary buds in ’Fuji’ apple trees. The ALF + Pro 50 and 100 mg/L treatments showed a significantly increase, with 2.6 fruits per cluster on terminal buds. Additionally, when ’Fuji’ apple flowers were exposed to –1°C after flowering, the untreat group showed a frost damage rate of 48.4%, whereas the ALF + Pro 100 mg/L treatment resulted in the lowest frost damage rate of 29.3%. In the amino acid contents of the fruit peel tissue, glutamic acid increased significantly in the ALF + Pro 10 and 50 mg/L treatments, while isoleucine and lysine increased significantly in the ALF + Pro 10 and 25 mg/L treatments. In the fruit flesh tissue, hydroxyproline, citrulline and isoleucine were not detected in the untreated fruit, but were detected in all ALF + Pro treatments. In particular, hydroxyproline content was 196.5, 177.7 and 214.9 mg/L in the ALF + Pro 10, 25 and 50 mg/L treatments, respectively. Glutamic acid content was 266.6~1,073.7 mg/L in all ALF + Pro treatments.