Improved agrotechnical decisions for production of certified potato seeds from variety Kalina

Emil Iliev, Miroslav Michov, Emilia Nacheva, Dima Markova, Vinelina Yankova, Stoyka Masheva, Violeta Blagoeva

Abstract: The influence of factors fertilization rate, planting density and term of leaf striping on the amount of standard yield, total yield and its components in the production of certified seed potato variety Kalina was studied. Planting density is determinative for the observed differences in the number of standard tubers and total tubers and with the strongest effect on the standard yield, percentage of standard produce and average tuber weight. Fertilization rate has the strongest influence on the characters standard yield and non- standard yield. Term of leaf striping has proven effect on standard yield, non-standard yield, total yield, percentage of standard produce and average tuber weight. Optimal agrarian and technical decisions – higher planting density (18 cm), increased level of mineral fertilization (N18P14K22), earlier term of leaf striping (20 days after mass flowering) for production of certified potato seeds from variety Kalina whose application result in increase of size of the standard yield in seed fractions and decrease of percentage of non-standard large tubers are established.

Keywords: certified seeds; density; fertilization; leaf striping; potato

Date published: 2017-01-27