The yield of grafted seedlings at a nursery and their quality depending on the training system applied at the nursery for rootstock grapevine
The paper describes the influence of the key agro-technical methods applied at nurseries for rootstock grapevine (feeding area and training) on the output of grafted seedlings per nursery and their quality. Test variants of rootstock wood preparation for scion at a nursery for rootstock grapevine included: short arm training combined with 3×2 m (control) planting scheme, as well as 4 and 6 m between bushes, two-tiered vertical cordon training combined with 2-4-6 m planting system. The minimal output of grafted seedlings was obtained when two-tiered vertical cordon was combined with 3×2 m feeding area. Expansion of the distance between mother bushes for rootstock grapevine 5ББ up to 4-6 m, irrespective of bush training, experimentally proved to increase the output of grafted seedlings per nursery and produced the best quality indicators.