Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Simona ROSU, Mihai Valentin HERBEI, Florin SALA
The study evaluated the linden leaf area (LA), and found models to describe the leaf area variation in relation to the leaf position on the shoot (Lp) and shoot parameters (CSL, cumulative shoot length). Leaves were studied on annual growth shoots, from the Cenad Forest Protected Area, Timis County, Romania. Leaf area (LA) was determined by scanning (SLA) and calculation based on leaf parameters (L, w) and correction factor (Cf = 0.31, optimal value found), based on relation of type MLA = L × w × Cf. The fit level between MLA and SLA (as reference) was described by a linear equation, and confirmed by R2 = 0.985 and RMSEP = 4.97363. The variation of SLA and CSLA (cumulative scan leaf area) in relation to the position of the leaf on the shoot (Lp) and cumulative shoots length (CSL) was evaluated by regression analysis and described by equations, 3D models and in the form of isoquants, under conditions of statistical safety (R2 = 0.960, R2 = 0.999, p <0.001). Some leaves have been found as deviations of SLA from the theoretical model and can be considered as foliar indicators (FI) for growth conditions during the shoot vegetation period.
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