| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 357.98 KB | Adobe PDF |
Advisor(s)
Abstract(s)
The influence of two sward treatments and soil cultivation on the composition, the structure, and the evolution of the biomass of vineyard weed
communities was examined. The 3-year study (2002-2004) was carried out in a sloping, non-irrigated vineyard, cv. ‘Cabernet Sauvignon’, in
the Estremadura winegrowing region of Portugal. The experimental treatments were: soil tillage (control); permanent sown cover crop - Lolium
perenne ‘Nui’, L. multiflorum ‘Bartíssimo’, Festuca ovina ‘Ridu’, F. rubra ssp. rubra ‘Echo’, Trifolium incarnatum. ‘Red’, T. repens ‘Huie’
and T. subterraneum ‘Claire’; and permanent resident vegetation. Total weed biomass in the spring did not reveal significant differences
between treatments, but varied annually. The management practices – e.g. time and number of soil cultivations and inter-row mowing – were
determinant in weed biomass evolution. Canonical correspondence analysis revealed significant treatment effects on community structure.
Three years after the experiment was set up, in the soil tillage treatment weed composition was dominated by annual broad-leaved species,
namely five Geraniaceae species, Medicago polymorpha and Sonchus oleraceus. The perennial broad-leaved species Oxalis pes-caprae was
also a dominant species in soil tillage. In both sward treatments there was an increase in the perennial broad-leaved and grass species. Compared
to soil tillage, in the resident vegetation treatment there was a significant increase in perennial species, such as Rumex crispus, Veronica
anagallis-aquatica and Polypogon monspeliensis, and in the annuals Melilotus indica and Avena sterilis. The increase in these perennial
species, which are considered to compete with vines, requires more frequent mowing in the summer. In the permanent sown cover crop
treatment, L. perenne and T. repens displayed the ability to re-establish successfully, and their abundance decreased or suppressed most of the
annual and perennial weed species.
Description
Keywords
vitis vinifera grapevine cover crops soil tillage weed community vinha enrelvamento mobilização do solo infestantes
Pedagogical Context
Citation
"Ciência e Técnica Vitivinicola". ISSN 0254-0223. 23:1 (2008) 29-36