被覆条件下のベッド栽培におけるカキ'刀根早生'と'新秋'の収量および果実品質に及ぼす葉果比の影響(栽培管理・作型)  [in Japanese] Effects of Leaf- Fruit Ratio on Yield and Fruit Quality of Japanese Persimmon (Diospyros kaki Thunb.) cv. Tonewase and cv. Shinsyu Grown in Raised Bed under Film (Crop Production & Cropping Type)  [in Japanese]

被覆条件下のベッド栽培における'刀根早生'と'新秋'の最適な着果基準を明らかにするために,収量と果実品質に及ぼす葉果比の影響を検討した.いずれの品種とも葉果比が高いほど収量が低下し,平均果重が増加する傾向がみられた.果実品質では'刀根早生'は葉果比の影響を受けなかったが,'新秋'では葉果比が高いほど可溶性固形物含量が増加した.収量と平均果重および果実品質からみて,最適葉果比は'刀根早生'では15,'新秋'では20であると考えられた.また,'刀根早生'の最適総結果母枝長は1樹当たり6m程度であると考えられた.

Effects of leaf-fruit ratio on yield and fruit quality were determined to demonstrate the optimal fruit load of 5- to 7-year-old Japanese Persimmon (Diospyros kaki Thunb.) cv. Tonewase and cv. Shinsyu grown in a raised bed under which a polyvinyl sheet was laid to limit root elongation under film. In both cultivars, yields decreased and average fruit weights increased with increase in leaf-fruit ratio. Leaf-fruit ratio did not affect fruit quality in cv. Tonewase, whereas the soluble solids content increased with increase in leaf-fruit ratio for cv. Shinsyu. It was considered that the optimal leaf-fruit ratios were 15 for cv. Tonewase and 20 for cv. Shinsyu, and the optimal total length of two-year-old branch per tree after pruning was about 6 m for cv. Tonewase.