菠萝渣对山羊生长性能、瘤胃发酵及血液生化指标的影响

Effects of pineapple pomace on growth performance,rumen fermentation and blood biochemical indices of goats

文章旨在评估日粮添加不同水平菠萝渣对山羊生长性能、养分消化、瘤胃发酵及血清生化指标的影响。试验将平均体重一致的120头山羊随机分为3组,每组8个重复,每个重复5头。各组山羊分别饲喂菠萝渣水平为0、10%和20%的全混合日粮,试验持续10周。结果 :20%菠萝渣组山羊的末重较对照组显著提高2.92%(P <0.05),同时该组平均日增重较对照组和10%菠萝渣组分别显著提高15.09%和7.98%(P <0.05)。随着日粮菠萝渣添加水平的升高,料重比表现为显著降低(P <0.05),其中20%菠萝渣组最低(P <0.05)。20%菠萝渣组瘤胃氧化还原电位较对照组和10%菠萝渣组分别显著提高10.44%和10.82%(P <0.05),同时20%菠萝渣组瘤胃挥发性脂肪酸总量和乙酸浓度较对照组分别显著提高12.71%和15.74%(P <0.05)。与对照组相比,10%和20%菠萝渣组瘤胃淀粉分解菌数量分别显著提高105.96%和108.07%(P <0.05)。对照组和10%菠萝渣组甘油三酯浓度较20%菠萝渣组分别显著提高42.05%和46.40%(P <0.05),对照组山羊血清非酯化脂肪酸浓度较20%菠萝渣组显著提高77.78%(P <0.05)。结论 :在本试验条件下,日粮添加10%~20%菠萝渣对山羊生长、瘤胃发酵及血清生化指标无负面影响,综合考虑生长性能和瘤胃发酵性能,山羊全混合日粮中菠萝渣适宜的添加水平为20%。

This experiment was conducted to evaluate the effects of different supplemental levels of pineapple pomace on growth performance,nutrient digestion,rumen fermentation and serum biochemical indices of goats. A total of 120 goats with the same average body weight were randomly divided into 3 groups with 8 replicates per group and 5 goats per replicate. Goats in each group were fed total mixed diets containing 0,10% and 20% pineapple pomace,respectively. The experiment lasted for 10 weeks. Results :Compared with the control group,the final weight of goats in 20% pineapple pomace group was significantly increased by 2.92%(P < 0.05),and the average daily gain of goats in 20% pineapple pomace group was significantly increased by 15.09% and 7.98%(P < 0.05)compared with the control group and 10% pineapple pomace group,respectively. With the dietary pineapple pomace supplemental level increasing,the ratio of feed to gain was significantly decreased(P< 0.05),and 20% pineapple pomace group had the lowest performance(P < 0.05). Compared with the control group and 10% pineapple residue group,the rumen reoxidant potential of 20% pineapple residue group was significantly increased by 10.44% and 10.82%(P < 0.05),and the total volatile fatty acid and acetic acid concentration of 20% pineapple residue group were significantly increased by 12.71% and 15.74%(P < 0.05),respectively,compared with the control group. Compared with the control group,the number of rumen starch decomposition bacteria in 10% and 20% pineapple residue groups was significantly increased by 105.96% and 108.07%(P < 0.05),respectively. The triglyceride concentration in control group and 10% pineapple residue group was significantly increased by 42.05% and 46.40% compared with 20% pineapple residue group(P < 0.05),and the serum non-esterified fatty acid concentration in control group was significantly increased by 77.78%compared with 20% pineapple residue group(P < 0.05). Conclusion :Under the conditions of this experiment,the addition of 10-20% pineapple residue in the diet had no negative effects on the growth,rumen fermentation and serum biochemical indexes of goats,considering the growth performance and rumen fermentation performance,the appropriate supplemental level of pineapple residue in the whole mixed diet of goats is 20%.