马铃薯淀粉渣-玉米秸秆混合青贮料对肉羊生产性能、瘤胃内环境和血液生化指标的影响

摘要/Abstract

摘要： 旨在研究马铃薯淀粉渣－玉米秸秆混合青贮料对肉羊生长性能和血液生化指标的影响。选择40只平均体重(47.45±6.38) kg、日龄(5月龄)的健康白萨杂交母羊,随机分为4个处理,每个处理10个重复,每个重复1只羊,饲养时间为70 d。4个处理分别为:1)对照组(Ctrl),40%精料＋60%全株玉米青贮料;2)试验1组(S15),40%精料＋45%全株玉米青贮料＋15%马铃薯淀粉渣-玉米秸秆混合青贮料;3)试验2组(S30),40%精料＋30%全株玉米青贮＋30%马铃薯淀粉渣-玉米秸秆混合青贮;4)试验3组(S45),40%精料＋15%全株玉米青贮＋45%马铃薯淀粉渣-玉米秸秆混合青贮。结果表明,S45组肉羊日增重相对于Ctrl组增加了14.19% (P<0.05),各处理组肉羊干物质采食量差异不显著(P>0.05)。S15、S30和S45组瘤胃液氨态氮浓度相对于Ctrl组极显著降低(P<0.01),分别降低了18.92%,30.17%和33.03%。3个试验处理组间乙酸等挥发性脂肪酸浓度、总挥发酸浓度、各种脂肪酸的摩尔比以及乙酸/丙酸和(乙酸+丁酸)/丙酸均无显著差异(P>0.05)。试验第0天、第20天和第40天各试验处理组间各项血清指标均无显著差异(P>0.05);试验第60天各试验处理组间总蛋白含量无显著差异(P>0.05),S15组和S45组尿素氮浓度较S30组和Ctrl组显著升高(P<0.05),S45组葡萄糖浓度较其他试验处理组显著升高(P<0.05)。马铃薯淀粉渣－玉米秸秆混合青贮料替代部分全株玉米青贮有提高肉羊日增重的趋势,可以提高血清尿素氮含量,显著降低瘤胃液氨态氮浓度。马铃薯淀粉渣－玉米秸秆混合青贮料的添加量可以替代肉羊饲粮中75%的全株玉米青贮料。

Abstract: This study was conducted to determine the effects of mixed silage with potato pulp and corn straw on growth performance and blood biochemical parameters of mutton sheep. 40 healthy White-Suffolk cross sheep with body weight of (47.45±6.38) kg were randomly allocated into 4 treatments with 10 replicates per treatment and 1 sheep per replicate. The feeding trial lasted 70 days. Four treatment included: 1)control group (Ctrl), 40% basal diet +60% corn silage; 2) test group 1 (S15), 40% basal diet +45% corn silage+15% mixed silage; 3) test group 2 (S30), 40% basal diet +30% corn silage+30% mixed silage; 4) test group 3 (S45), 40% basal diet +15% corn silage+45% mixed silage; The result showed that the averaged daily gain of S45 group was increased by 14.29% compared with Ctrl group (P<0.05). No significant differences were observed in the dry matter intake (P>0.05). The ammonia-N content was significantly decreased in S15, S30 and S45 groups than that in Ctrl group by 18.92% (P<0.01), 30.17% (P<0.01) and 33.03% (P<0.01), respectively. No significant differences were observed in acetate content, propionate content, butyrate content, acetate percentage, propionate percentage, butyrate percentage, the ration of acetate to propionate and the ration of acetate to propionate and butyrate (P>0.05). On the zero, twentieth and fortieth day of the trial, no significant differences were observed in serum total protein (P>0.05). On the sixtieth day of the trial, the serum urea nitrogen content was significantly increased in S15 and S45 groups than that in S30 and Ctrl group (P<0.05). On the sixtieth day of the trial, the serum glucose contents of S45 group was improved compares with the other three groups (P<0.05). In conclusion, the mixed silage with potato pulp and corn straw can increase serum urea nitrogen content and decrease the ammonia-N content of mutton sheep. Therefore, the study suggests that it is feasible when mixed silage with potato pulp and corn straw replaced 75% yellow corn silage in the mutton sheep diet.

中图分类号:

王典,李发弟,张养东,卜登攀,孙鹏,周凌云. 马铃薯淀粉渣-玉米秸秆混合青贮料对肉羊生产性能、瘤胃内环境和血液生化指标的影响[J]. 草业学报, 2012, 21(5): 47-54.

WANG Dian, LI Fa-di, ZHANG Yang-dong, BU Deng-pan, SUN Peng, ZHOU Ling-yun. Mixed silage of potato pulp and corn straw affects growth performance, ruminant environments and blood biochemical parameters of mutton sheep[J]. Acta Prataculturae Sinica, 2012, 21(5): 47-54.

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