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KMID : 0903620040450050252
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Journal of the Korean Society for Horticultural Science
2004 Volume.45 No. 5 p.252 ~ p.255
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Influence of Nutrient Level and Rootstock on Fruit Quality of ‘Fuji’ Apple Trees
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Chun Ik-Jo
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Abstract
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Rootstocks and nutrient levels significantly affected yield and fruit quality of ‘BC-2 Fuji’ apple trees. Tree on Bud.9 produced the smallest fruit and the lowest yield per tree. Fruits on M.7 EMLA had relatively bigger than those on other rootstocks. Fruits on Ottawa 3 had higher soluble solids concentrations (SSC) than those on other rootstocks, and the differences were sometimes significant. However, starch degradation pattern (SDP) of fruits on M.7 EMLA had the lowest rates. Trees on dwarf rootstocks, Bud.9, and M.9 had relatively smaller and maturer fruits than trees on less dwarf or moderate vigorous rootstocks, such as Ottawa 3, M.26 EMLA, and M.7 EMLA. Fruits on dwarf rootstocks had higher ethylene evolution rates than those on more vigorous rootstocks. Trees receiving 22.4 ㎏ N/㏊ had significantly lower yield in both years. Fruits treated with 22.4 ㎏ N/㏊ showed better color and firmness than those with 89.7 or 156.7 ㎏ N/㏊. Amount of N did not affect fruit SSC. High N application (156.7 ㎏ N/㏊) increased fruit SSC and SDP values, as compared with fruits treated with 22.4 ㎏ N/㏊. Red color of fruit skin was improved as the decrease of N application. Fertigated N affected fruit ethylene evolution rates during storage. High amount of N increased fruit ethylene evolution rates.
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KEYWORD
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ethylene evolution, fertigation, Malus domestica
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