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This manuscript presents the effect of foliar and soil fertilizer produced from thermally processed bone waste on the initial growth and development of maize plants. The developed fertilizers were tested in three different doses in a pot experiment. Because nutrient deficiency interferes with plant physiological processes, the impact of the developed fertilizers on gas exchange parameters, relative chlorophyll content, and chlorophyll fluorescence parameters were assessed. Based on the conducted research, it was found that fertilization with developed foliar and soil fertilizers increased the relative content of chlorophyll in maize leaves and increased the value of gas exchange parameters and chlorophyll fluorescence. All determined parameters of gas exchange and chlorophyll fluorescence showed a positive correlation depending on the dose of foliar fertilization used (average value r = 0.8414). In turn, the soil fertilization that was utilized during the experiment significantly correlated only with the content of chlorophyll (r = 0.6965). The tested fertilizers improvement of the physiological parameters of the plants, which indicates the fertilizing efficiency of the tested fertilizers.

Effect of Foliar and Soil Fertilization with New Products Based on Calcinated Bones on Selected Physiological Parameters of Maize Plants