CHEMICAL COMPOSITION AND NUTRITIVE VALUE OF DIFFERENT OAT FORMS AS INFLUENCE BY SPRINKLING IRRIGATION AND NITROGEN FERTILIZATION

The aim of this study was to determine the effect of sprinkling irrigation and nitrogen fertilization on chemical composition of grain in selected forms of oat as well as yields of protein, energy and fat. Studies were conducted in the years 2010-2011 at the Teaching and Experimental Station in Gorzyn, Branch in Zlotniki, belonging to Poznan University of Life Sciences, on soil classified as very good and good rye complex in the split-split-plot design in 4 replications. Experimental factors included the water treatment (non-irrigated, sprinkling-irrigated), form of oat (tall husked oat cv. 'Bingo', husked dwarf oat cv. STH 6106, hulless oat cv. 'Polar') and nitrogen fertilization (0, 50, 100 and 150 kg ha(-1) N). It was found that sprinkling irrigation caused an increase in protein yield by 47.8%, fat yield by 99% and that of energy by 77.7%. Moreover, application of irrigation contributed to a reduction of contents of protein and fibre, and an increase in the contents of fat and nitrogen-free extractives in grain. Among the compared forms the greatest contents of protein and fat, but the lowest fibre content, were found in the hulless oat form ('Polar').