摘葉がトマトの尻腐れ果発生に及ぼす影響(栽培管理・作型)  [in Japanese] Effects of Defoliation on the Incidence of Blossom-End Rot in Tomato Fruit (Lycopersicon esculentum Mill.)(Crop Production & Cropping Type)  [in Japanese]

トマトの小葉を50%摘除することによって,蒸散を抑制し,蒸散流を変化させることで,尻腐れの発生にどのように影響するかを調査した.その結果,摘葉によって尻腐れが発生しやすいとされている'NDM0112'および尻腐れが発生しにくいとされている'Summer Kiss'ともに尻腐れ果発生率が有意に減少した.両品種とも,1単位園試処方培養液を施与した個体は,1/2単位園試処方培養液を施与した個体よりも高い尻腐れ果発生率を示した.また,正常果の数および生体重に対する,摘葉による影響は認められず,収量の低下はなかった.

We removed 50% of the leaflets from tomato plants (Lycopersicon esculentum Mill.), which reduced whole plant transpiration and xylem sap, to investigate defoliation effects on the incidence of blossom end rot (BER). As a result, both 'NDM0112' and 'Summer Kiss', high and low BER cultivars, respectively, shoed a reduced BER incidence in plants receiving defoliation treatment. Furthermore, the concentration of nutrient solution also effected the incidence of BER: a higher concentration of nutrient solution induced more BER. However, defoliation treatment did not decrease the number of marketable fruit or the fresh weight per fruit. Our results indicated that defoliation treatment of tomato plants could reduce BER incidence without compromising marketable yield.