RESEARCH ABOUT INFLUENCE OF VARIETY, CULTURE SUBSTRATE AND NUTRIENT SPACE ON POTATO MINITUBERS PRODUCTION.

This study was conducted to determine the minituberization capacity of three Romanian potato varieties. The threefactor experiment included the following factors: A - culture substrate with two graduations: a1 - 80.00% red peat, 9.90% black peat and 10.10% perlite, a2 - 84.03% red peat, 7.9% black peat and 8.06% perlite; B: nutrition space, with two graduations: b1 - 1.5 l, b2 - 2 l; C: variety, with three graduations: c1 - Marvis; c2 - Castrum; c3 - Ervant. Examination of the results on the number and weight of minitubers/plant suggests the high capacity of the Castrum variety for the production of minitubers, when using increased space nutrition and the substrate consisting of a smaller concentration of red peat (80.00%). Regarding the minitubers number, when it was used the substrate with a higher concentration of red peat (84.03%) the Castrum variety was distinguished in a bigger nutrition space (2 l). [ABSTRACT FROM AUTHOR]