Effect of feeding urea treated wheat straw and formaldehyde treated barley grains on milk composition and some blood metabolites of Meriz does

摘要

The study was conducted to examine the effect of feeding urea straw and formaldehyde treated barley grains on milk composition and blood biochemistry in Meriz does. Fifteen does aged 4 years of matching body weights and same lactation stage were randomly divided into 3 equal groups. All the animals were fed a ration contained 80% concentrate + 20% wheat straw. For the control group the wheat straw was untreated; for the T1 and T2 groups, the wheat straw was treated with urea but T2 had half of the barley grains of the concentrate portion was treated with formaldehyde. Feeding urea treated straw increased significantly (P<0.05) milk yield. Fat and protein percentages increased significantly (P<0.05) in treatment T2 in comparison with control group. A significant increase was noted in the concentration of blood urea in does fed either urea treated straw or formaldehyde treated barley grains as compared to control. It can be concluded that feeding urea treated straw and formaldehyde treated barley grains to Meriz does improved milk production and milk components.