浒苔多糖对肉牛生长性能、血清生化指标和瘤胃发酵参数的影响

The effects of enteromorpha polysaccharide on growth performance,serum biochemical indicators,and rumen fermentation parameters of beef cattle

文章旨在探究日粮中添加浒苔多糖(Enteromorphapolysaccharide,EP)对肉牛生长性能、血清生化指标和瘤胃发酵参数的影响。试验将120头日龄和体重[(291.37±13.82)kg]相近的健康西杂肉牛随机分为4组,每组5个重复,每个重复6头。各组分别在基础日粮中添加0、300、600和1200mg/kg EP。整个饲养试验为期80d,包括7d的预饲期和73d的正试期。结果表明,与对照组相比,600和1200mg/kg的EP组肉牛FBW分别显著提高3.03%和2.79%(P<0.05),1200mg/kg的EP组肉牛的ADG较其余各组分别显著提高8.28%、9.29%和8.11%(P<0.05);1200mg/kg的EP组肉牛的F/G较其余各组分别显著降低5.91%、7.17%和5.99%(P<0.05)。300mg/kg EP组肉牛血清IgA含量较对照组显著降低(P<0.05);600mg/kg EP组肉牛血清IgA含量显著升高(P<0.05);1200mg/kg EP组肉牛血清IgA含量与对照组无显著差异(P>0.05);300~1200mg/kg EP组肉牛血清IgG含量显著提高(P<0.05);600和1200mg/kg EP组肉牛血清SOD活性显著提高(P<0.05),尿素氮含量显著降低(P<0.05)。300~1200mg/kg EP组肉牛瘤胃微生物蛋白含量显著提高(P<0.05);1200mg/kg EP组肉牛瘤胃总挥发性脂肪酸含量显著提高(P<0.05);300~1200mg/kg EP组肉牛瘤胃丙酸比例显著提高(P<0.05)。结论:EP可通过改善肉牛的血清生化指标和瘤胃发酵促进其生长发育,在本试验条件下,1200mg/kg的添加量效果最佳。

To investigate the effects of adding Enteromorpha polysaccharide(EP)to the diet on the growth performance,serum biochemical indicators,and rumen fermentation parameters of beef cattle.120 healthy Western crossbred beef cattle with similar age and weight[(291.37±13.82)kg]were randomly divided into 4 groups,with 5 replicates in each group and 6 cows in each replicate.Each group was fed experimental feed with 0,300,600,and 1200 mg/kg EP added to the basic feed.The entire feeding experiment lasted for 80 days,including a 7-day pre trial and a 73 day trial.The results showed that,Compared with the control group,the FBW of beef cattle in the 600 and 1200 mg/kg EP groups was significantly increased by 3.03%and 2.79%,respectively(P<0.05).The ADG of beef cattle in the 1200 mg/kg EP group was significantly increased by 8.28%,9.29%,and 8.11%,respectively(P<0.05)compared to the other groups;The F/G of beef cattle in the 1200 mg/kg EP group was significantly reduced by 5.91%,7.17%,and 5.99%compared to the other groups,respectively(P<0.05).The serum IgA content of beef cattle in the 300 mg/kg EP group was significantly reduced compared to the control group(P<0.05);The serum IgA content of beef cattle in the 600 mg/kg EP group significantly increased(P<0.05);There was no significant difference in serum IgA content between the 1200 mg/kg EP group and the control group(P>0.05);The serum IgG content of beef cattle in the 300~1200 mg/kg EP group significantly increased(P<0.05);The serum SOD activity was significantly increased(P<0.05)and the urea nitrogen content was significantly reduced(P<0.05)in the 600 and 1200 mg/kg EP groups of beef cattle.The rumen microbial protein content of beef cattle in the 300-1200 mg/kg EP group significantly increased(P<0.05);The total volatile fatty acid content in the rumen of beef cattle in the 1200 mg/kg EP group was significantly increased(P<0.05);The proportion of propionic acid in the rumen of beef cattle in the 300~1200 mg/kg EP group significantly increased(P<0.05).(Experimental conclusion):EP can promote the growth and development of beef cattle by improving their serum biochemical indicators and rumen fermentation.Under the experimental conditions,the optimal dosage of 1200 mg/kg is optimal.