2003 Volume 2 Issue 3 Pages 183-186
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.
