Accumulation Characteristics of Fruit Weight, Diameter and Main Nutrient Composition Indices in Growing 'Boysenberry' Fruit (533-540)

摘要

In this study, the dynamic accumulation characteristics of the fruit weight, fruit diameter, and nutrient composition indices including total sugar, total acid and vitamin C of blackberry (Rubus L. subgenus Rubus) 'Boysenberry' were investigated respectively. All the indices accumulated at the late stages of fruit development and exhibited an; incomplete single S-shaped curve. Complete single S-shaped curves were uniformly observed for accumulation rate of fruit weight, total sugar and vitamin C, while total acid showed a horizontal double S-shaped curve and the average diameter an upward and basic symmetrical parabola trend. The accumula-tion acceleration of fruit weight, total sugar and vitamin C exhibited an upward and asymmetrical parabola pattern, while the total acid and average diameter showed a horizontal single S-shaped curve and a straight line respectively. The growth models of the fruit parameters accurately fitted the blackberry growth patterns and provided reference for better understanding of blackberry development with the days after fruit-setting.