SciELO - Scientific Electronic Library Online

vol.35 issue1Tissue-specific accumulation of flavonoids in grape berries is related to transcriptional expression of VvF3'H and VvF3'5'HComparison of proanthocyanidins with different polymerisation degrees among berry skins of 'Shiraz', 'Cabernet Sauvignon', and 'Marselan' author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand



Related links

  • On index processCited by Google
  • On index processSimilars in Google


South African Journal of Enology and Viticulture

On-line version ISSN 2224-7904
Print version ISSN 0253-939X


WOOLDRIDGE, J.  and  OLIVIER, M.P.. Effects of weathered soil parent materials on Merlot grapevines grafted onto 110 Richter and 101-14Mgt rootstocks. S. Afr. J. Enol. Vitic. [online]. 2014, vol.35, n.1, pp.59-67. ISSN 2224-7904.

In a trial under semi-controlled conditions, Merlot grapevines on 101-14Mgt and 110 Richter (110R) rootstocks were grown in virgin soils developed in highly weathered parent materials derived mainly from granite and metasediment (shale). Each soil was irrigated at c. -0.075 MPa. The clay fractions of both soils were dominated by kaolinite. Lime and P were supplied, but no K. Bray II soil K levels from both parent materials were similar in the field state, but lower in the shale than in the granite when averaged over the trial period. Petiole K concentrations did not differ between rootstocks on the granite, but on the shale soils were higher in the vines on 101-14Mgt than on 110R. The granite x 101-14Mgt treatment significantly promoted (p < 0.05) greater trunk circumferences, cane mass, leaf areas and overall wine quality than the shale x 110R treatment. Yields from grapevines in the granite x 110R and granite x 101-14Mgt treatments did not differ significantly. However, the granite x 101-14Mgt treatment produced higher yields than the shale x 101-14Mgt and shale x 110R treatments. These differences were attributed to an interaction between the soil and rootstock, with K availability and uptake as contributory factors.

Keywords : Coastal region; granite; kaolinite; potassium; shale; Western Cape.

        · text in English     · English ( pdf )