Die effek van verskillende oppervlakbewerkingspraktyke op die wortelverspreiding van wingerd
Date
2007-03
Authors
Brink, Daan
Journal Title
Journal ISSN
Volume Title
Publisher
Stellenbosch : University of Stellenbosch
Abstract
This study forms part of an ARC Nietvoorbij research project on the long-term effect of
different groundcover management practices in vineyards. This study concentrated on the
root distribution of the vines after different groundcover practices were used for one
decade.
The vineyard on the research farm of the Agricultural Research Council at Robertson,
South Africa, was divided into 56 equally distributed trail blocks, 14 treatments with four
replicas each. For the study Chardonnay cultivar on 99 Richter rootstock was used. This
study concentrated on only eight treatments. The eight different cover crop practices
consisted of the mechanical treatment, chemical treatment, straw mulch treatment,
permanent cover crop treatment and four annual cover crop treatments. The annual cover
crop treatments consisted of triticale cover crop that was sprayed with an herbicide before
bloom, a triticale cover crop that was left to die naturally, a grazing vetch cover crop that
was sprayed with an herbicide before bloom and a grazing vetch cover crop that was left
to die naturally. The vineyard was established in November 1992 while the different
treatments started in April 1993. Root studies were conducted during the 2002/2003
season.
In this study the auger method was used to determine root density (mm/cm³). The root
density was correlated with data from the penetrometer studies, yield and shoot mass
collected during the same season.
Description
Thesis (MScAgric (Soil Science))--University of Stellenbosch, 2007.
Keywords
Dissertations -- Soil science, Theses -- Soil science, Vineyards -- Management, Grapes -- Roots, Grapes -- Soils, Cover crops