Grain yield and physiological parameters of gas exchange in common bean as a function of copper fertilization

Conducting a field study to investigate the effects of foliar and soil fertilization with copper on nutritional physiological parameters grain yield common bean. The experimental design was randomized block, in 2 x 5 factorial scheme. first factor site application fertilization. second doses: 0, 1, 2, 3, 4 kg ha-1 (6 replicates). following were evaluated: leaf nitrogen contents, relative chlorophyll index (RCI), gas exchange, photochemical efficiency photosystem II, yield. data subjected analysis variance F test (p-value < 0.05), using Scott & Knott for qualitative polynomial regression quantitative data. Leaf Cu content higher (4% 28%), both at 24 45 DAE, respectively. Net photosynthesis reached maximum 18.77 µmol m-2 s-1 dose ha-1. 2.0 one that led highest yields; however, stood out about 12% foliar. Soil proved be more efficient terms absorption RCI rates, improving (12%) relation foliar, especially provided best differential profit, reaching US$ 581.96 503.01 application,