Effect of driedBacillus subtilisculture on growth, body composition and hepatic lipogenic enzyme activity in female broiler chicks

Abstract

To investigate the effect of driedBacillus subtilisculture on growth, body composition and hepatic lipogenic enzyme activity, female broiler chicks were fed on either no additive (control) or driedB. subtills-culture-supplemented commercial diets (215 g crude protein/kg, 12.85 MJ metabolizable energy/kg) at 10 or 20 g/kg diet for 28 d from 14 to 42 d of age. Body weight, and moisture, fat, protein and ash contents of the body were not influenced by theB. subtilisculture. Feed efficiency. N utilization, the ratio of abdominal fat or liver to body weight, acetyl-coenzyme A carboxylase (EC6·4·1·2) activity, liver and serum cholesterol contents were significantly lower in treatment groups, while fatty acid synthetase activity and serum cholesterol concentration were not significantly different, compared with the control group. Liver triacylglycerol concentration was decreased in chicks given 20 g culture·kg diet, while serum and carcass triacylglycerol concentrations were significantly lower in treatment groups than in the control group. Serum phospholipid concentration was increased but carcass phospholipid concentration was decreased in chicks given 20 gB. subtilis/kg diet, while liver phospholipid concentration was not significantly influenced. The advantages of inclusion ofB. subtilisto the broiler diet included improved feed efficiency, less abdominal fat, reduced triacylglycerol concentrations in the liver, serum and carcass and reduced cholesterol concentrations in the liver and carcass.