Common wheat (Triticum aestivum L.) and oilseed rape (Brassica napus L.) leaf area data were used in this study to calculate photosynthetic potential (PP) using a refined calculation method. This method is based on the use of regression analysis for the determination of variation curves from the leaf area points. The obtained optimal curve is integrated and PP is calculated in this way. The advantage of the refined method is that regression analysis allows us to determine the curve, which is generally non-linear and more precisely conforms to the variation habit, therefore its integration produces a more accurate PP value. Thus, the adequacy of curves to the law of nature and accuracy of area calculation by integrating enables a more accurate assessment of this critical indicator of productivity biology – photosynthetic potential, which makes this method likely to be applied in practice.
Keywords: photosynthetic potential, regression curves, integration method.