Influence of the key agronomic factors on the dynamics of growth and the leaf formation at Oriental tobacco variety Krumovgrad 944

Ivko Stamatov, Antoaneta Yancheva

Abstract: Agriculture farming scheme strongly influences the development of oriental tobacco throughout the vegetation. In the period 2009-2011 it was based complex agronomic experience with three densities of planting and three norms of mineral fertilization with combined fertilizer NPK 15.15.15. The rate of positive fertilization influences plant height and number of leaves formed during active plant growth. The resulting correlations were demonstrated in degrees of freedom 0.01. Increasing food area also has a positive impact on the dynamics of growth and leaf formation, correlation odds are not statistically proven. Nitrogen fertilization is a critical element in the fertilization, which most directly and strongly influences development of economic and technological and chemical characteristics of oriental tobacco. Increasing nitrogen fertilization from 0 to 20 and 30 kg/ha in pure substance increases the size of the leaves of all stem positions.

Keywords: agronomical factors; densities of planting; mineral fertilization; Oriental tobacco

Date published: 2017-01-27