ISHS Acta Horticulturae 617: Workshop on Rootstocks' Performance in Phylloxera Infested Vineyards
THE INFLUENCE OF ORGANICALLY MANAGED VINEYARD-SOILS ON THE PHYLLOXERA-POPULATIONS AND THE VIGOUR OF GRAPEVINES |
| Authors: | L. Huber, M. Porten, G. Eisenbeis, E.H. Rühl |
| Keywords: | Daktulosphaira vitifoliae, rootstock, microbiota, soil management, sustainable agri-culture, microbial biomass carbon, soil fungi, phytopathogen |
| Abstract:
Field trials carried out in the years 1997-1999 by the Institute of Zoology, University of Mainz and the Department for Grapevine Breeding and Grafting at Geisenheim, Germany showed significant differences between conventionally and organically managed phylloxera-infested vineyards. A decrease in phylloxera abundance in the organically managed areas treated with spruce sawdust could be detected. The application of organic matter also lead to a significant improvement of vine health. This improvement is documented in the relative chlorophyll content (RCC), yield and the visual assessment of vine growth. One possible cause are structural changes in the microorganism communities. In further trials at the University of Mainz changes in soil microbial activity and composition were studied. For this purpose different biotic and abiotic soil parameters were determined. Our aim was to detect the possible underlying soil-root-microorganism-interactions and to derive new concepts for soil cultivation. One abiotic soil parameter, which has a strong influence on the microorganism communities and their activity, is soil-pH. Comparative studies on the pH of rhizosphere and non-rhizosphere soil of two differently managed vineyards showed significant differences in pH-values and the microbial carbon biomass. Further investigations on the effects on the soil microbiota are in progress. | |
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