Developmental Stage and Climatic Factors Impact More on Carbohydrate Reserve Dynamics of Shiraz than Cultural Practice

摘要: The overwintering carbohydrate reserve status of grapevines has been linked to fruiting responses in the following season, providing a possible avenue for yield management through manipulation accumulation. Conducted across four consecutive seasons, this study examined extent which accumulation could be altered Shiraz using existing, or variations cultural practices. Removal one-third two-thirds clusters at veraison increased average total nonstructural (TNC) concentrations wood by 7% relative control vines after two seasons treatment and 20% three. Hedging all shoots five nodes harvest reduced TNC 14% 27% flowering season 3 due mobilization budbreak. Deficit irrigation treatments applied between fruit set veraison, harvest, had no significant effect on wood, none evaluated consistent influence storage roots. Shoot hedging most pronounced reproductive development, with an increase bud necrosis reduction inflorescence flower numbers While results indicate there is some scope alter practice, substantially seasonal pattern dynamics vines. It suggested that developmental stage climatic factors stronger storage, practice change may more suited effecting longer-term adjustments vine productivity than short-term fluctuations.