Accumulation of macronutrients in agata potato cultivar under organo-mineral fertilizer in winter crop

The effect of organo-mineral fertilizers on potato plants is still poorly understood. Therefore, the objective of this study was to evaluate the extraction and uptake of macronutrients by potato plants. The experiment was conducted in the municipality of Cristalina (GO), Brazil, with Agatapotato cultivar during the winter crop. The experimental design was a randomized block with 6rates and 4 repetitions. The rates of organo-mineral fertilizer were based on recommendations for a mineral fertilizer, corresponding to 40, 60, 80, 100 and 120% of a mineral fertilizer. The mean accumulation of nutrients in potato plants was higher for the organo-mineral treatments relative to the conventional mineral fertilizer. Tuber yields in the organo-mineral treatments were identical to the treatment with a mineral fertilizer, including the treatment corresponding to 40% of a mineral fertilizer, which demonstrates the efficiency of organo-mineral fertilizers. The average translocation of macronutrients in treatments with organo-mineral fertilizers was 14% N, 73% P, 45% K, 13% Ca, 83% Mg and 24% S accumulated during the potato growth cycle.