The objective of this work was to evaluate the effect of the nitrogen (N) fertilization timing on grain quality parameters and physiological quality of seeds of oat (Avena sativa L.). The experiment consisted of combinations of cultivars (CTC 5, UFRGS 15, UFRGS 19, UPF 18) and N fertilizer availability (no added N; 48kg N ha-1 at sowing; 16kg N ha-1 at sowing and 32kg N ha-1 at tillering; and, 16kg N ha-1 at sowing, 16kg N ha-1 at tillering and 16kg N ha-1 at panicle emergence). Test weight, caryopsis percentage and physiological quality of seeds, were not affected the by timing and split of N fertilizer applications. Applying N fertilizer at panicle emergence increased the protein concentration in the caryopsis.
Avena sativa L.; nitrogen; protein; test weight; caryopsis percentage
