Defoliation and Fruit Coloration in ‘Fuji’/M.9 Apple Affected by Cu-EDTA and Fe-EDTA Foliar Spray
Defoliation and Fruit Coloration in ‘Fuji’/M.9 Apple Affected by Cu-EDTA and Fe-EDTA Foliar Spray
Heon-Kyu Lim(Chungbuk National University); Hyunsuk Shin(Gyeongnam National University of Science & Technology); In-Chang Son(National Institute of Horticultural and Herbal Science, Rural Development Administration); Youngjae Oh(Chungbuk National University); Keumsun Kim(Chungbuk National University); Hyeondae Han(Chungbuk National University); Sewon Oh(Chungbuk National University); Daeil Kim(Chungbuk National University)
37권 4호, 448~454쪽
초록
The objective of this study was to determine whether two chelate compounds (Cu-EDTA and Fe-EDTA)applied as a foliar spray could effectively defoliate ‘Fuji’/M.9 apple trees and improve fruit qualityand fruit coloration. Foliar spray with these two chelate compounds at 30 days before harvestsignificantly defoliated fruit cluster leaves, which improved light interception of ‘Fuji’/M.9 appletrees. However, Cu-EDTA non-selectively defoliated bourse shoot leaves and true leaves, whichare involved in photosynthesis during the late period of fruit growth. Cu-EDTA markedly reducedfruit weight, soluble solids content, and fruit coloration compared to Fe-EDTA. Regarding Fe-EDTAconcentration, 3% Fe-EDTA was more effective at enhancing fruit coloration but lowered fruitweight compared to 1% Fe-EDTA. Consequently, we found that 1% Fe-EDTA induced moreselective defoliation of fruit cluster leaves than Cu-EDTA and was more effective in improving fruitquality and fruit coloration of ‘Fuji’ apple trees.
Abstract
The objective of this study was to determine whether two chelate compounds (Cu-EDTA and Fe-EDTA)applied as a foliar spray could effectively defoliate ‘Fuji’/M.9 apple trees and improve fruit qualityand fruit coloration. Foliar spray with these two chelate compounds at 30 days before harvestsignificantly defoliated fruit cluster leaves, which improved light interception of ‘Fuji’/M.9 appletrees. However, Cu-EDTA non-selectively defoliated bourse shoot leaves and true leaves, whichare involved in photosynthesis during the late period of fruit growth. Cu-EDTA markedly reducedfruit weight, soluble solids content, and fruit coloration compared to Fe-EDTA. Regarding Fe-EDTAconcentration, 3% Fe-EDTA was more effective at enhancing fruit coloration but lowered fruitweight compared to 1% Fe-EDTA. Consequently, we found that 1% Fe-EDTA induced moreselective defoliation of fruit cluster leaves than Cu-EDTA and was more effective in improving fruitquality and fruit coloration of ‘Fuji’ apple trees.
- 발행기관:
- 한국원예학회
- 분류:
- 원예학