Yield of artichoke (Cynara cardunculus L. var. scolymus (L.) Fiori) depending on plant density
Abstract
Purpose. Study and analysis of world experiencein artichoke cultivation at different plant densitiesand the impact of the latter on its productivity. Developmentof a mathematical polynomial model of the crop productivitydepending on its thickening.Methods. Synthetic-analytical method for generalizationof research data obtained in various studies on artichokecultivation technology, mathematical analysis by polynomialregression (polynomial of the second degree) to develop a model of the crop productivity depending on the plantdensity. Graphical approximation of the model by plottinga polynomial of the second degree and building a parabolaof the crop productivity.Results. The developed polynomial model of artichokeproductivity depending on the plant density expressed as"Yield=4.8872+0.0017×Density–3.0162×10-8×Density2"provides sufficient prognostic efficiency (the valueof the mean absolute percentage error of the modelMAPE is 24.59%) and fit quality. Analysis of the resultsof mathematical modeling suggests the need to studythe agrotechnology of artichoke at the densities from 10 to35 thousand/ha. The least promising are artichoke plantdensities in the ranges of 5-10 and more than 35 thousand/ha, which are accompanied by a decrease in the cropproductivity according to the approximation curve.Conclusions. The results of the study indicate thatthe optimal density of artichoke plants depends on growingconditions, however, there is a clear trend to an increase inthe crop yields under conditions of thickening. Mathematicalmodeling has shown that the modal values of the populationof artichoke plants per 1 ha are within10-15 thousand/ha,while the most promising in terms of the crop productivityshould be density values from 20 to 35 thousand/hadepending on agro-climatic conditions and morphobiologicalfeatures of certain variety.
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