The exposable leaf area and the leaf index, which characterize the grapevine training systems in the Averești Wine-growing Centre, Huși vineyard

Abstract

Investigations carried out in the Avereşti wine- growing centre, in the Huşi vineyard, pointed out that the training forms on hightrunk and on semi-high trunk defined two different training systems. These were different from each other by the exposable leaf area, the leaf index and the exposure degree of the canopy to the direct solar radiation. The values of these indicators showed that the training system on semi-high trunk had a qualitative potential superior to the training system on high-trunk, ensuring a more rational distribution of the young shoot within the grapevine canopy, and a better exposure of the leaf area to direct solar radiation. Due to these characteristics the training system on semi-high trunk allowed to accumulate higher quantities of sugar in grapes and to obtain must with balanced acidity.