Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 20 ISSUE 4
Written by Maria BĂLA, Florin SALA
The present study evaluated the behaviour of three ornamental species through flowers, in off-season cultivation conditions, in order to ptimize production parameters. The total time of flowering (Ttf) was described, for each species, by mathematical models, in relation to the emperature and plants height. The biological material was represented by the species: Lathyrus odoratus L.; Antirrhinum majus L., and atthiola incana (L.) W.T. Aiton., respectively. The variation of the plant height, in the studied ornamental species, in relation to the emperature (T), was described by polynomial equations of degree 3, in safety statistical conditions (R2=0.975 for Lathyrus; R2=0.987 for ntirrhinum, and R2=0.971 for Matthiola, respectively). In relation to the biological specificity and the behavior in the off-season, the hree species had different values for the total time of flowering (Ttf); Ttf = 19 days for Lathyrus; Ttf=166 days for Antirrhinum, and tf=210 days for Matthiola. Multiple regression analysis led to the obtaining of Ttf estimation models, depending on the temperature (T, °C) nd the height of the plants (H, cm), in statistical safety conditions. The Wolfram Alpha software facilitated the obtaining of 3D and soquant graphic distribution models of Ttf, according to T (°C) and H (cm), for each species studied. The optimal values for H and T were etermined, in order to obtain the best total flowering time, in off-season conditions, values that can be ensured by the cultivation echnology of the studied species.
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