Published in Scientific Papers. Series B, Horticulture, Vol. LXIII, Issue 1
Written by Antoniya STOYANOVA, Velika KUNEVA, Nikolai VALCHEV
The optimization of the water and fertilization regime in vegetable crops solves a number of problems related to increasing the efficiency of usable irrigation water, the water deficit and a number of environmental problems. The purpose of this paper is to model the mathematical relationship between productivity and quality of yield in tomatoes, greenhouse production and the factors that have the strongest influence on its formation - irrigation and fertilization regimes. Investigated the interaction of different levels of the humidity created by the application of controlled constant water deficit (factor A - irrigation) at three levels of fertilization (factor B - fertilization) on the productivity and quality of tomatoes, greenhouse production. As a result of cluster analysis are distinguished and separated into groups according to similarities variants with optimum irrigation rate and 75% manure, and variants with 100% rate of fertilization and reduced irrigation regime. Based on the deduced Linear Regression models it was found that the overall yield is dependent on the output of the first quality. The coefficient of determination varies in a narrow range (R2=0.925-0.989).
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