EFFECT OF MINERAL AND ORGANIC FERTILIZATION ON THE PRODUCTIVITY OF STEVIA (Stevia rebaudiana B.)

Ahmed Mehmed, Georgi Kikindonov, Stanimir Enchev

Abstract: An experiment has been made in the fields of the Agricultural Institute - Shumen during 2013-2015 to study the effect of three organic and mineral products: Bioactive (100ml/da), Humustim (40 ml/da) and mineral nitrogen (20 kg/da), on the productive qualities of stevia (Stevia rebaudiana B.) For that aim I year seedlings were used. The parameters fresh and dry mass of a single plant, and fresh and dry mass yield from one da, were measured. It was established, that the highest fresh mass yield from a single plant is formed by the variant, treated with mineral Nitrogen (20 kg/da) - the average yield of fresh mass is with 90 g (75.8%) higher than that of the untreated control. The tested organic and mineral products have positive influence on the dry mass yield index for the three years of testing.

Keywords: dry mass; fresh mass; organic and mineral products; productivity; stevia

Date published: 2018-06-01