Published in Scientific Papers. Series B, Horticulture, Vol. LXIV, Issue 1
Written by Denitsa HRISTOVA, Diyan GEORGIEV, Evlogi MARKOV
At the Research Institute of Mountain Stockbreeding and Agriculture in Troyan, Bulgaria, in the period 2017-2018, the influence of different types of fertilization (conventional and organic) on the content of the basic nutrients (macro and microelements), as well as some pigments in the leaves of 'Tegera’ and 'Elena’ plum cultivars was studied. The established parameters and the dynamics of changes in the values of nutrients and pigments composition in the leaf samples, before and after the harvesting of fruits, significantly determine some of the characteristics of the physiology and genotypic specificity of the cultivars. It has been reported that the amount of pigment content of the fertilizer variants of 'Tegera’ cultivar decreased after harvest and increased in the control trees. For 'Elena’, after the harvest, the leaf mass in the conventional fertilization variant increased its percentage of nitrogen and phosphorus.
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