Sanitary-toxicological assessment of feed from Sterlitamak district of Republic of Bashkortostan on availability of nitrogen-containing compounds

The study conducted of 17 samples of feed on content of nitrogen-containing compounds released from the farms of Sterlitamak district of the Republic of Bashkortostan: LTD "Agrofirma Salavat", LTD "Avangard", AE named of Kalinin. Determination of the content of nitrogen-containing compounds in feed was carried out according to GOST 13496.19-93: nitrates by ionometric method (using ion-selective electrode), nitrites by photometric method (using Griess reagent). It is established that the content of nitrates in the majority of samples of forages (90.5%) received from farms of Sterlitamak district of the Republic of Bashkortostan was within the established level of maximum permissible concentrations. There was a slight excess of MPC standards in grain mix and haylage from LTD "Agrofirma Salavat" by 8.7 and 11.1%, respectively. The content of nitrites in all feeds from the territory of these farms does not exceed the established level of MAC. The obtained results indicates that these farms have a favorable situation of the content of nitrates and nitrites in the investigated feeds.