The evaluation of leaf area by the grapewine

Abstract

The contribution deals with leaf area assesment of 9 grapevine varieties. The measurements were carried out by means of Leaf Area Metr CI-202 (scanner type). The results show, that the size of leaf area per vine is as foolow: 1,16–2,09 m2 during the prolongation growth stage, 1,49–3,20 m2 during flowering and 1,99–3,30 m2 during bunch and cane ripening. The quickest growth of leaf area is during phenological stage of flowering. The varieties Hibernal, Müller Thurgau, Sauvignon blanc, Saint Laurent, Zweigeltrebe have adequate proportion of leaf area and carry-over. On the contrary the varieties Ranfol bianco, Petit Riesling, André, Limberger have smaller leaf area. The results show option of applied working operations (defoliation, bunch thinning) at veraison.

Keywords

• vineyard
• leaf area
• leaf area index
• leaf area metr