nfluence of Substrate pH on Root Growth, Biomass a nd Leaf Mineral Contents of Grapevine Rootstocks Grown in P ots

Abstract

The present study was carried out in order to test the effect of grapevine rootstocks root growth on biomass and leaf nutrition status in extr eme soil conditions. Own rooted cuttings of rootstocks Fercal, Teleki Kober 5BB, Ge orgikon 28 and four new rootstock hybrids from the breeding program of Georgikon Facu lty, Hungary (FB01, JB01, Zamor 17 and SZF10) were grown 3 months in pots. The 5 L pots were filled with a layer of gravel, high lime content Rendzina soil (pH 8.54) t opped with a layer of peat-soil mixture (pH 4.94). The biomass production, shoot, leaf and root development largely depended on the rootstocks genotype. The differences among stud ied rootstocks were significant under low pH. Correlation was found between the root dry weight and the aboveground parts. The ratio between them was strongly influenced by r ootstocks genotype. Rootstocks had strong influence on leaf nutrient status. Keywords : Root pot experiment, Soil pH, Vine rootstock.