The article presents the results of field studies on the effect of different doses of cadmium on the assimilating leaf area, photosynthetic potential, its change as the area of the leaf surface formed in a particular interfacial period, and the duration of the interfacial period. The introduction of cadmium in a dose of 10 mg/kg of soil had a negative impact on the increase in the vegetation phases and on the accumulation of the total potato biomass by the end of the vegetation. At the same time, the output of the obtained products per 1000 units of photosynthetic potential decreased by 0.24 kg of tubers compared to the background version. On average, for 2 years of research, the maximum value of leaf productivity was observed at a dose of cadmium 1 mg/kg, which is most likely due not to the biological need for it, but to stimulating intoxication.
Keywords: heavy metals, cadmium, photosynthetic potential, net photosynthetic productivity, leaf productivity.