Prevention of grapevine chloroses with specific fertilization
Abstract
High lime contents in soil induce chlorosis in grapevine. Photosynthetic activity of leaves are reduced with longlasting effects on vine vitality, yield and wood hardening. Effekts of high lime contents are alkaline pH values which as a consequence reduce the iron availability. A reduction in iron uptake negatively influences chlorophyll biosynthesis leading to a yellow coulering of leaves. Chlorosis can be prevented by fertilization or reduction of the pH value. Within the project we aim to investigate the effects of three different fertilizers on vine physiology and chlorosis prevention. A pre-experiment will test different sources of CaCO3 for chlorosis induction with rootstock Teleki 5C in pot experiments. These conditions will be applied in the main experiment with grafted vines (Zweigelt x SO4). Additionally different fertilizers will be applied to the soil and no further fertilization will be conducted during the experimental period. Grapevine physiology will be mesured with gas exchange, hyperspectral reflectance and chlorophyll fluoreszence. At the end of the experiment leave and root samples will be collected for targeted metabolites and nutrients analyses. The experminte will show how and in which aspects plant react on calcaerous souls as well as the effects of different fertilizers in the interaction.
keywords chlorosis Viticulture Iron
Publikationen
Project staff
Michaela Griesser
Assoc. Prof. Priv.-Doz. Dipl.-Ing. Dr.nat.techn. Michaela Griesser
michaela.griesser@boku.ac.at
Tel: +43 1 47654-95814
Project Leader
04.06.2018 - 31.12.2019
Sarhan Khalil
Sarhan Khalil MSc.
sarhan.khalil@boku.ac.at
Tel: +43 1 47654-95820
Project Staff
01.07.2018 - 31.12.2019