Effects of tannin supplementation in Silvafeed preparations on the productivity of commercial laying hens
The study was carried out to evaluate the effect of tannin supplementation (in Silvafeed inoculum) on the efficiency of laying hens. The experiment was conducted on 160 hens from 14 to 17 weeks of age and 160 laying hens from 21 to 24 weeks of age of the hens lay white feathered (M15). Chickens were randomly assigned to treatments: NT1, NT2, NT3 and NT4 with supplement levels of tannin, respectively: 0, 300, 450 and 600 g/ton of feed. The results showed that: Tannin supplementation at 600 g/ton of feed significantly increased growth performance and feed efficiency for hens (P<0.05). For laying hens, supplementing with tannin at 600 g/ton of feed increases the laying rate and reduces feed consumption per 10 eggs (P<0.05); The indicators of pH, humidity, total aerobic bacteria and total E. coli in chicken manure all decreased with increasing tannin content in feed.
