The effect of adding tomato straw to feed on growth performance,immune indicators,and nutrient apparent digestibility of fattening pigs
The aim of this experiment is to investigate the effects of adding tomato straw to feed on the growth performance,immune indicators,and apparent nutrient digestibility of fattening pigs. 160 healthy binary(growing)hybrid pigs with an average weight of(84.29±2.74)kg were randomly divided into 4 groups,with 1 replicate for every 5 pigs and 1 group for every 8 replicates. Experimental diets containing 0％,0.8％,1.6％,and 3.2％ tomato straw were added to the base diet. The results showed that compared with the control group,the 3.2％ tomato straw group significantly reduced the final weight of fattening pigs by 2.98％(P<0.05);The average daily weight gain of fattening pigs in the 1.6％ and 3.2％ tomato straw groups was significantly reduced by 8.33％ and 11.82％,respectively(P<0.05);The material to weight ratio significantly increased by 9.48％ and 14.62％,respectively(P<0.05);Compared with the control group,the apparent digestibility rates of CP,EE,and Ca in the 1.6％ and 3.2％ tomato straw groups of fattening pigs were significantly reduced by 5.96％,7.55％,7.21％,8.55％,and 18.30％,16.62％,respectively(P<0.05);The apparent digestibility of GE in fattening pigs treated with 3.2％ tomato straw significantly decreased by 10.81％(P<0.05);The serum IgG content significantly decreased(P<0.05),IL-1 content significantly increased(P<0.05),and IL-10 content significantly decreased(P<0.05)in the 1.6％ and 3.2％ tomato straw groups of fattening pigs;The serum ALT activity of fattening pigs was significantly increased in the 3.2％ tomato straw group(P<0.05). Conclusion:Excessive(3.2％)use of tomato straw has a significant negative impact on the immune and digestive absorption functions of fattening pigs. Therefore,the amount of tomato straw added to the feed for fattening pigs should not exceed 1.6％.
万方数据
维普
