Octyl Alcohol 처리가 ‘후지’ 사과의 착과와 과실품질에 미치는 영향

본 연구는 ‘후지’ 품종에 석회유황합제(lime sulfur)와 옥탄올(octyl alcohol) 처리가 착과와 과실 품질에 미치는 영향을 조사하였다. 석회유황합제(Bé 22°)는 ‘후지/M.9’ 나무에 중심화 만개 2일후와 3일후에 2회 처리하였고, 옥탄올은 중심화 만개1일 후(1D), 2일 후(2D), 3일 후(3D)에 각각 1회 처리하였다. 과총당 착과수는 정화아의 경우 무처리구는 3.71개, octylalcohol 2D 처리구는 1.85개였고, 액화아의 경우는 무처리구(3.27개)에 비하여 octyl alcohol 2D와 3D 처리구가 각각 0.96개와 1.01개로 매우 낮은 착과수를 보였다. 그리고 중심과 착과율은 무처리구의 경우 정화아는 82.3%, 액화아는 63.8%였고,octyl alcohol 2D 처리구의 경우 정화아는 60.6%와 액화아는 33.9%였다. 정화아의 무착과율은 무처리는 0.7%였으나, octylalcohol 2D 처리구는 19.7%로 무착과율이 높았다. 그리고 정화아에서 1과만 착과된 비율은 무처리구는 2.0%로 매우 낮았지만 octyl alcohol 2D 처리구는 23.6%로 높았다. 또한 3과와 4과 이상의 착과율을 보면 무처리구는 80.3%였으나, octylalcohol 2D 처리구는 31.5%로 가장 낮았다. 그리고 꽃눈분화율과 과실품질은 무처리구와 적화제 처리구들 간에는 차이를 보이지 않았다. 따라서 옥탄올 처리는 무처리구와 비교하여 적화제로서 긍정적인 효과를 보여주었다. This study was carried out to investigate the effect of lime sulfur and octyl alcohol treatments on the fruit set andfruit quality of ‘Fuji’ apples. Lime sulfur (Bé 22°) was sprayed twice at 2 and 3 days after the central flower’s fullbloom (CFFB). Octyl alcohol (81%) was applied at 1 day (1D), 2 days (2D), or 3 days (3D) after CFFB in‘Fuji/M.9’ trees. The number of fruits per cluster in terminal flowers (TF) was 3.71 for the control and 1.85 forthe octyl alcohol 2D treatment, the number in lateral flowers (LF) were very low - 0.96 and 1.01 for the octylalcohol 2D and 3D treatments, respectively- compared with untreated (3.27). The percentage of central fruit percluster was 82.3% in the TF and 63.8% in the LF for the control, and 60.6% in the TF and 33.9% in the LF for theoctyl alcohol 2D treatment. Furthermore, the rate of non-fruit set per cluster in the TF was 0.7% for the controland 19.7% for the octyl alcohol 2D treatment. Single fruit rate per cluster in the TF was very low for the controlbut higher in the octyl alcohol 2D treatment. In addition, the percentage of clusters with three or more than fourfruits per cluster was 80.3% for the control, but lower for the octyl alcohol 2D treatment. There was no differencein flower bud differentiation rate and fruit quality between the control and octyl alcohol treatments. Overall, theresults indicated that octyl alcohol treatment positively affected flower thinning compared with the control. KCI Citation Count: 0