9个甜樱桃品(系)果实发育过程中品质形成规律研究OA

Fruits of nine open-field-cultivated sweet cherry varieties,including'Zaodaguo'(Крупноплодная),were used as experimental materials.The objective of the study was to elucidate the dynamic changes in external and internal quality during fruit development and provide a reference for fruit quality regulation,fertilizer and water management,and timely harvest.This study analyzed the changes in single fruit mass,fruit shape index,soluble solids,soluble sugar,titratable acid,vitamin C and total phenol contents during fruit development,and correlation analysis was conducted.The re-sults showed that the single fruit mass,fruit longitudinal and transverse diameters,soluble solids and soluble sugar increased gradually with fruit development.Twenty-two and twenty-eight days after flowering were the key periods of fruit quality development of early maturing varieties and middle-to-late maturing varieties,respectively,during which the contents of soluble solids and soluble sugar be-gan to accumulate rapidly.The contents of titratable acid,vitamin C and total phenols exhibited com-plex fluctuation patterns during fruit development.The overall change tendency of the contents of ti-tratable acid and vitamin C varied significantly among different varieties,and the total phenol content showed an overall upward trend.The correlation analysis revealed significant or highly significant posi-tive correlations among the fruit longitudinal diameter,transverse diameter,fruit mass,soluble sol-ids content,soluble sugar content and total phenol content.The correlation of titratable acid content and vitamin C content with other quality indicators varied substantially among different varieties.In conclusion,twenty-two and twenty-eight days after flowering were the key periods for fruit quality development of early maturing varieties and middle-to-late maturing varieties,respectively.Fertilizer and water management should optimized during these periods to improve fruit quality.Total phenol content increased with development,whereas titratable acidity and vitamin C varied among varieties.