島根農科大学研究報告

Shimane Agricultural College

ISSN:0559-8311

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Use this link to cite this item : https://ir.lib.shimane-u.ac.jp/3882

島根農科大学研究報告 15

1967-01-31 発行

ブドウの生育ならびに果実の収量・品質に及ぼす窒素肥料の分施効果と土性との関係

Effects of Split Application of Nitrogen Fertilizer on Vine Growth, Yield and Quality of Delaware Grapes in Relation to Soil Properties

Naito, Ryuji

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Using 3-year-old fruiting Delaware grapes planted in pots with sandy and clayey soil, respectively, experiments were conducted to examine the effects of split application of a given amount of nitrogen fertilizer on vine growth, bunch yield and quality.
1. In sandy soil, vine growth increased and bunch yield markedly decreased with the increasing time of nitrogen fertilization from 3 to 12. Particulary, berry number per bunch which had the high conection with bunch yield was detrimentally affected by the increasing time of application.
2. In clayey soil, 6 times-application resulted in the best vine growth, though bunch yield tended to be a little higher with the increasing time up to 12.
3. In both soils, bunch quality based on soluble solids content and skin color became inferior in proportion to the fertilizer timing, accompanied by an increase in per cent foliar nirogen at both the stages of flowering and harvest.

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