Achieving Vine Balance of Syrah with Mechanical Canopy Management and Regulated Deficit Irrigation

摘要: Canopy architecture, yield components, fruit composition, and vigor of Syrah were measured in response to four canopy management three regulated deficit irrigation (RDI) treatments. The control consisted dormant hand pruning 22, two-node spurs (HP) with no further manipulation. Other treatments mechanically box vines 10 cm hedges thinning the a density 5 (CLL) or 7 (CLM) count shoots per 30 row hedge shoot (CLH). Control irrigated 70% evapotranspiration (ETo) from set until harvest (RDIC). either received full vine ETo veraison 50% (RDIL) thereafter between (RDIE) thereafter. Mechanical removed 25% total shoots, exposing 70,600 shoots·ha−1 distance 4.6 on cordon, which translated leaf layers 12.6 m2 area. combination CLM RDIE decreased berry weight at by 12% without decreasing compared HP, resulting 21.5 tons·ha−1 yield. A was needed achieve balance crop load 9.9 kg yield/kg area ratio 0.75 m2·kg−1. study identified method that can be used reduces input costs through mechanization enhances composition provides sustainable production.