Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Denitsa HRISTOVA, Diyan GEORGIEV
During the period 2016-2018 at the Research Institute of Mountain Stockbreeding and Agriculture in Troyan a study was conducted to analyze different agrotechnical systems (organic and conventional fertilizing technology) in plum plantations. As a result of the fertilization, the vegetative and reproductive manifestations of plum cultivars with different ripening periods (Tegera and Elena) were monitored. Correlation and regression analysis established the relationship between the studied indicators. Depending on the applied system, genotypic similarity but also cultivar difference was analyzed. The biological fertilization of the Tegera cultivar determines a positive correlation between the average fruit weight and the average yield kg/tree at a correlation coefficient (r = 1.000) and regression equation y = 11.422 x - 341.62 with a coefficient of determination R2 = 1.0. In contrast to organic production, in the conventional technology in both cultivars a correlation was found between the average mass of the stone and the average yield kg/tree; (Tegera r = 0.866; Elena r = 0.714), with a coefficient of determination (Tegera R2 = 0.750; Elena R2 = 0.510).
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