Effects of Bacillus subtilis natto on Growth Performance, Digestive Performance and Serum Biochemical Indexes of Sheep
ZHANG Junyu1, WANG Lianqun2, WANG Chengmin1, CONG Shaobo3, WANG Wenqi1, GUO Tongjun1
1. Institute of Feed Research, Xinjiang Academy of Animal Science, Urumchi 830000, China;
2. College of Animal Science, Tarim University, Alar 843300, China;
3. Urumqi Zoo, Urumchi 830000, China
Abstract：This experiment was conducted to investigate the effects of Bacillus subtilis natto (BSN) on growth performance, nutrient apparent digestibility and serum biochemical indexes of sheep.Forty small-tailed Han sheep with the similar body weight were randomly assigned to 4 groups with 10 sheep in each group by a single factor completely randomized design. Sheep were fed diets with 0 (CK), 2 (A), 6 (B) and 10 g/sheep (C) BSN per day, respectively. The results showed as follows:1) compared with the CK group, the average daily gain (ADG) in groups A, B and C increased by 33.43 (P>0.05), 32.29 (P<0.05) and 57.15 g/d (P<0.01), respectively. 2) The nutrient apparent digestibility increased with the BSN supplemental level increasing (P>0.05). 3) The serum urea nitrogen content in groups A, B and C was lower than that in group CK by 0.73%, 23.44% and 30.04% (P>0.05). There was no significant effect on immune globulin (Ig) A, IgG and IgM contents in serum among groups (P>0.05). It is concluded that the BSN has a positive effect on increasing deposition of crude protein in diets of sheep, ADG increases with the increasing addition of BSN, and the effect is significant when adding 10 g/sheep BSN per day.
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