ISHS Acta Horticulturae 689: VII International Symposium on Grapevine Physiology and Biotechnology
EFFECTS OF THE PRUNING SYSTEM ON PHYSIOLOGICAL ACTIVITY, LEAF AREA AND SOURCE-SINK RATIO ON VITIS VINIFERA L. ´VERDEJO´ |
| Authors: | S. López-Miranda, J. Yuste, J.R. Lissarrague |
| Keywords: | cane pruning, spur pruning, photosynthesis, water potential, must, yield |
| Abstract:
Increased mechanization in the vineyard will require the use of different training/trellis systems and spur pruning. Therefore, it is important to understand the physiological consequences of spur pruning, compared to cane pruning, and its effects on yield and fruit quality. A study was conducted over a three-year period to compare spur pruning and cane pruning while maintaining the same number of shoots per vine. ‘Verdejo’ grafted onto ‘110R’ and vertically shoot positioned growing in vineyard in the Rueda Appellation of Origin, Valladolid, Spain was used. Leaf gas exchange, water relations, leaf area development and vine productivity were measured. No significant differences in gas exchange measured at 0900 h (solar time) were found among the pruning treatments. The canopy surface area, yield and must composition were also similar among the treatments. This indicates that there was no modification in the source/sink relationships of the vines due to pruning type. | |
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