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The present had as its objective to evaluate the response of dry mass total yield, and bromatological composition of the forage, submitted to different nitrogen doses, applied as swine waste in the pasture of Cynodon dactylon cv. ‘Vaquero’. The study was developed during the period of November 2017 until March 2018, in the experimental area of the ‘Pontificia Universidade Catolica do Parana’, campus Toledo, located in the western region of Parana, under latitude 24o43′13″ S and longitude 53o47′01″ W. The experimental design adopted was of randomized blocks with six treatments (0, 50, 100, 150, 200 and 250 kg ha-1) constituted by crescent doses of nitrogen as swine waste, with five replicates, totalizing 30 experimental plots. It was studied the dry mass yield (kg ha-1), crude protein (CP), dry mass (DM), neutral detergent fiber (NDF), acid detergent fiber (ADF), insoluble nitrogen in neutral detergent (NDIN), insoluble nitrogen in acid detergent (ADIN), lignin, ether extract (EE) and mineral matter (MM). It was verified that the N doses influenced in the dry mass yield of the forage, because it reached a productivity of 4520.57 kg ha-1 in the dry mass. The highest crude protein content of ‘Vaquero’ was obtained with the dose of 250 kg ha-1 of nitrogen, in which was observed a content of 13.72 g kg-1 of CP in the dry mass. The different nitrogen doses, applied as swine waste in the pasture of grass ‘Vaquero’, have an influence in the bromatological composition and in the dry mass yield, causing an increase in the forage contents of crude protein (CP), dry mass (DM), ether extract (EE), in forage produced under four cutting periods. The increase in the nitrogen doses improves the nutritional quality of grass ‘Vaquero’, once it causes decreases in the NDF and ADF content and increases in the CP and DM content.

journal of agricultural science

Dry Mass Yield and Bromatological Composition of the Forage of Cynodon dactylon cv. Vaquero Submitted to Crescent Doses of Nitrogen, Applied as Swine Waste