夏秋トマト雨よけ栽培における放射状裂果の発生に及ぼす積算日射量の影響(栽培管理・作型)  [in Japanese] Effects of Total Integrated Solar Radiation on Radial Fruit Cracking in Tomato Cultivation under Rain Shelter in Cool Uplands(Crop Production & Cropping Type)  [in Japanese]

夏秋トマト雨よけ栽培において,放射状裂果の発生の要因を明らかにするため,整枝法の違いによる日射量の影響について3年間検討した.夏秋トマト栽培におけるくず放射状裂果の発生は,幼果期から緑熟期頃までの積算日射量が一定水準を超えた果実に発生しやすい傾向か認められ,茎葉や果実に日射が当たりやすい条件で発生しやすいと判断された.また,果実肥大が旺盛な果実ほど放射状裂果が起こりやすい傾向が認められた.

This study investigated the cause of radial fruit cracking in tomato cultivation under rain shelter in the cool uplands in Gifu Prefecture. The effect of total integrated radiation using two types of training methods was determined over a three-year periodo. The percentage of refused radial fruit cracking associated with increased total integrated solar radiation from the young fruit stage to the mature green stage. Fruit cracking occurred in the training method which foliage and fruits recived a large amount of light-interception. Also, as for fruits that undergo vigorous enlargement, the frequency of the radial fruit cracking increased.