Document Type : Research Paper
Authors
Gorgan University of Agricultural Sciences and Natural Resources
Abstract
this study was conducted to investigate effect of milk enrichment with manganese supplement in organic and inorganic forms on performance, digestibility, skeletal growth indices, fecal consistency and hematology of suckling calves. 24 newborn calves were randomly divided into 3 groups with 8 replications. Experimental treatments include: 1) control group (without manganese supplementation), 2) Adding mineral manganese supplement to milk consumption and 3) Adding organic manganese supplements to milk consumption. Calves were weighed and measured every 21 days to determine performance and skeletal growth indices. Daily feed intake and post-feeding amount were measured and three days a week, the feces of the calves were randomly evaluated. The results showed that the enrichment of milk with manganese supplements in organic and inorganic forms caused weight gain in the whole period, daily weight gain and dry matter consumption. Calves that receiving milk with organic and inorganic manganese supplements had better digestibility of dry matter. Enrichment of milk with supplements in organic and inorganic forms had no effect on skeletal growth indices. The greatest improvement in fecal consistency was related to the group receiving organic manganese and then mineral manganese. An increase in hemoglobin, hematocrit and white blood cells was observed in the treatments receiving organic and inorganic manganese, and the highest amount of red blood cells was related to the treatment receiving milk with organic manganese. In general, it can be concluded that adding 30 mg of organic manganese to milk results in better performance and health of calves.
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