Abstract
The examination was carried out in the vineyard on "Radmilovac"- Experimental field Faculty of Agriculture in Belgrade. The aim of the research was to detect the effects of three rootstocks (K 5BB, SO4 and Š 41B) on Prokupac fertility. The paper presents the results of four years tests that showed variation of different fertility parameters depending on the rootstock. Rootstock K 5BB had the highest impact on the number of developed shoots per vine (14.1), number of productive shoots per vine (12) and the highest percent of developed shoot per vine (96%). Higher percentage of productive shoots was recorded on rootstock SO4 (93.7%). In comparison to other two rootstocks (5BB K and Š 41B) on the same rootstock was recorded higher values for the following parameters: inflorescences number per bud (1.5), inflorescences number per developed shoot (1.6) and number of inflorescences per productive shoot (1.7). Š 41B rootstock influenced cluster number per vine (20.5) and cluster mass (172.9 g).
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