甜高粱饲草及葡萄籽对小尾寒羊生产性能及血液生理参数的影响

通过测定不同类型甜高粱饲草与葡萄籽饲喂小尾寒羊的生产性能和血常规,为甜高粱饲草和葡萄籽安全高效的饲喂绵羊提供理论依据。试验选取甘肃省定西市的小尾寒羊28只(17.30±1.20) kg,随机分为4组,分别为:饲喂甜高粱青贮+精补料(SN组)、甜高粱青贮+6%葡萄籽精补料(SY组)、甜高粱干草+精补料(DN组)、甜高粱干草+6%葡萄籽精补料(DY组)。分别在饲养试验的第1、30、60和100天晨饲前称重;第20、50和100天晨饲前采集血液,测定血常规。结果表明:甜高粱饲草与葡萄籽的添加对小尾寒羊平均干物质采食量、平均日增重和料重比影响不显著(P>0.05),但SY组比DN组平均日增重增加30%以上,终体重增加15.4%。葡萄籽的添加对小尾寒羊血液生理参数影响不显著(P>0.05)。甜高粱青贮组(SN+SY)小尾寒羊红细胞数目(RBC)和红细胞压积(HCT)显著高于甜高粱干草组(DN+DY)(P<0.05)。甜高粱青贮组(SN+SY)平均红细胞血红蛋白含量(MCH)和平均红细胞血红蛋白浓度(MCHC)极显著低于甜高粱干草组(DN+DY)(P<0.01)。试验第20和100天甜高粱青贮组(SN+SY)小尾寒羊血小板数目(PLT)显著低于甜高粱干草组(DN+DY)(P<0.05)。试验动物血液生理参数均在安全生产范围内,但饲喂甜高粱青贮对小尾寒羊红细胞和血小板相关指标更有利,且甜高粱青贮和葡萄籽结合饲喂对小尾寒羊生长性能有改善的潜力。

Effects of sweet sorghum forage and grape seed on production performance and blood physiological parameters of small-tailed Han sheep

This experiment aimed to provide a theoretical basis for safe and efficient utilization of sweet sorghum forage and grape seed. The experiment was conducted in Dingxi City, Gansu Province. A total of 28 Small-tailed Han sheep (17.3±1.20) kg were randomly selected and divided into four groups and fed: sweet sorghum silage+concentrate (SN group), sweet sorghum silage+6% grape seed concentrate (SY group), sweet sorghum hay+concentrate (DN group), sweet sorghum hay+6% grape seed concentrate (DY group). The sheep were weighed before morning feeding on days 1, 30, 60, and 100 of the experiment feeding period. Blood was sampled before the morning feeding on days 20, 50, and 100 days and blood indicators were measured. It was found that: the sweet sorghum forage and grape seed had no significant effect on the dry matter intake (DMI), average daily gain (ADG) or feed conversion ratio (F/G) of the sheep (P>0.05), but the ADG of the SY group was 30% higher than the DN group, and the final weight gain was 15.4% more. The grape seed had no significant effect on the blood physiological parameters of the sheep (P>0.05). The red blood cell (RBC) and hematocrit (HCT) were significantly higher in sweet sorghum silage groups (SN and SY) than sweet sorghum hay groups (DN and DY) (P<0.05). The mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC) were very significantly higher in sweet sorghum hay groups (DN and DY) than in sweet sorghum silage groups (SN and SY) (P<0.01). Platelet counts (PLT) of the sheep in the sweet sorghum silage groups (SN and SY) on the 20th and 100th days were all significantly lower than that in sweet sorghum hay groups (DN and DY) (P<0.05). The blood physiological parameters of the experimental animals were all within the safe range, but feeding sweet sorghum silage provided a beneficial improvement of red blood cell and platelet indicators of the sheep, and the combination of sweet sorghum silage and grape seeds improved the daily growth rates of the sheep.