Ambrosia artemisiifolia L. leaves fractal geometry variation in relation to nitrogen rate
DOI:
https://doi.org/10.59463/xpajwq78Keywords:
Ambrosia artemisiifolia, comparative analysis, fractal, leaf geometry, nitrogenAbstract
Common ragweed (Ambrosia artemisiifolia L.) plants grew and developed after harvesting experimental variants in wheat crop fertilized at variable nitrogen rates. Differential plant growth was observed, positively associated with nitrogen rate. The leaf geometry of common ragweed plants was evaluated by fractal analysis. The fractal dimensions (D) showed an increasing variation, in the range D = 1.5741 at the N0 level, up to D = 1.7168 at the N200 level. A polynomial equation described the variation of the fractal dimension (D) with nitrogen rate (R2 = 0.999, p = 0.0156). Differences between the mean and median values of the D values, in the leaf samples on the variants N0, N50, N100, N150 and N200, were statistically confirmed. The variable rate of fractal dimension variation (DVrv) and the absolute rate of fractal dimension variation (DArv) based on leaf geometry were recorded, associated with the nitrogen levels on which common ragweed plants were grown. The fractal dimension (D) of ragweed leaf geometry can be a refined indicator that expresses the level of development, competitiveness and invasiveness potential of ragweed plants (Ambrosia artemisiifolia) in relation to the fertility level of the occupied lands, or potential to be occupied.
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