Evaluation of nutritional value of fermented peanut meal and its effect on growth performance of piglets
The purpose of the study was to evaluate the nutritional value of fermented peanut meal(FPM)and its effect on the growth performance of weaned piglets.The experiment was divided into three parts.Experiment 1:Twelve'Duroc x Landrace x Yorkshire'ternary castrated boars with initial weight of(10.0±2.0)kg were randomly divided into two groups,which were fed with basal diet and FPM diet respectively,with six replicates in each group and one pig in each replicate.The available energy values of two kinds of diets were measured by total fecal collection method,and the digestive energy and metabolizable energy of pigs were calculated by nested algorithm.Experiment 2:Twelve'Duroc x Landrace x Yorkshire'ternary castrated boars with an initial weight of(15.0±2.0)kg with T-shaped fistula installed at the end of ileum were randomly divided into two groups,which were fed with nitrogen-free diet and semi-homozygous diet with 30％FPM as the only nitrogen source,with six replicates in each group and one pig in each replicate.The experiment lasted for seven days,The apparent ileal digestibility(AID)and standard ileal digestibility(SID)of FPM were measured by collecting terminal ileal chyme on the last two days.Experiment 3:50 weaned piglets with an initial weight of(8.0±1.0)kg were randomly divided into five groups with 10 replicates in each group,half in male and half female,with one pig in each replicate.The control group was fed with corn-soybean meal basal diet,and the experimental group was fed with 2％,4％,6％,and 8％FPM experimental diets for 21 days.The results showed that the digestive energy and metabolizable energy of FPM were 15.17 and 13.83 MJ/kg,respectively,and the SID of lysine,methionine,threonine and tryptophan were 85.85％,92.44％,87.80％,and 84.09％respectively.Compared with the control group,the dietary FPM had no significant effect on the average daily feed intake and diarrhea rate of weaned piglets(P＞0.05).Addition of 2％～8％FPM significantly increased average daily gain(P＜0.05)and decreased feed-to-weight ratio(P＜0.05).The results show that the effective energy value and amino acid utilization rate of FPM are high.Adding 2％～8％FPM to the diet of weaned piglets can reduce the feed-to-weight ratio of piglets,and the feeding effect of 6％FPM is better.
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