The evaluation of vine leaves development dynamic
Burg, P., Mendel Univ., Lednice (Czech Republic). Dept. of Horticulturae Machinery | Vitez, T., Masaryk University, Brno (Czech Republic). Dept. of Agriculture, Food and Environmental Engineering | Michalek, M., Mendel Univ., Lednice (Czech Republic). Dept. of Horticulturae Machinery
This experiment was focused on evaluation of grape vine leaves surface area development of the six varieties on experimental sites in Velke Bilovice and Lednice, in the viticultural conditions of the South Moravia. The dynamic of leaves surface area development was mesured by using device LAM CI--202 (Leaf Area Meter, the device operating on the principle of the scanner and the resulting values are expressed through the leaf area index (LAI). The measurements were carried out in four dates (May, June, July, August) during phenological growth stages of growth, flowering, initial development of fruits (Berries pea-sized, berries beginning to touch). Obtained results show, that the greatest increase of the leaves surface area on annual shoots is during phenological growth stages of flowering and during initial development of fruits.To the development of the leaves surface area of the leaves on lateral shoots then occurs after tipping of the top parts of the annual shoots, the main axes of herbaceous shoot are interrupted. During the phenological growth stage of the development of fruits was measured at both sites the largest leaves surface area on the varieties St. Laurent in the variety, Lemberger, Cabernet Moravia and ranged from 2.74 to 4.24 square m per plant.
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