ASSIMILATION OF NUTRIENTS FROM COMMON WHEAT (TRITICUM AESTIVUM L.) DEPENDING ON SOME AGRONOMY FACTORS

Abstract

The genotype specificity in the uptake of the main nutrients according to the fertilization rate was investigated in Triticum aestivum L. varieties under conditions of a vegetation experiment. Four fertilization rates were tested: N0P0K0, N200P200K200, N400P200K200 and N600P200K200. The response of the varieties to the nutrition conditions provided was studied during several stages of growth and development. The different nutrition regimes used lead to manifestation of the specific abilities of the varieties to take up nutrients. Genotype and mineral fertilization had a higher effect on nutrients uptake than stage of development. During the initial stage of wheat development, the differences established in the uptake of macro elements were greater between the varieties than between the individual fertilization rates. The differences were most evident at maturation. This specificity was well expressed in nitrogen and phosphorus uptake in total biomass and to a lesser extends - in potassium uptake. Varieties Slaveya and Milena had highest amounts of nitrogen uptake in grain