摘要
试验旨在研究玉米秸秆穰叶对肉羊生长性能、养分表观消化率及血清生化指标的影响.选取健康状况较好、体重(30.0±3.0)kg的母羊30只,按体重相近原则,随机分为2组,每组3个重复,每个重复5只羊.对照组以整株玉米秸秆作为粗饲料,试验组以玉米秸秆穰叶作为粗饲料,试验组和对照组精料一致.预试期10 d,正式试验期90 d.结果显示,与对照组相比,试验组肉羊的平均日增重提高了10.58%,平均日干物质采食量提高了1.01%,料重比降低了8.66%.试验组肉羊对饲粮中干物质、粗蛋白、粗脂肪、中性洗涤纤维、酸性洗涤纤维、钙及磷的表观消化率分别比对照组提高了6.52%、8.69%、9.43%、8.17%、8.43%、5.87%和6.51%.试验组肉羊血清中总蛋白含量、球蛋白含量及碱性磷酸酶活性分别比对照组提高了3.41%、10.70%和12.42%,尿素氮含量降低了5.00%.试验组肉羊血清中免疫球蛋白A、免疫球蛋白M、免疫球蛋白G、补体C3和补体C分别比对照组提高了5.89%、7.90%、7.58%、6.95%和2.66%.研究表明,与整株玉米秸秆相比,玉米秸秆穰叶是草食家畜的一种优质粗饲料.
Abstract
The experiment was conducted to study the effect of corn stalk leaves and pith on the growth performance,nutrient apparent digestibility,and serum biochemical indexes of mutton sheep.Thirty healthy ewes weighing(30.0±3.0)kg were randomly divided into two groups according to the principle of similar body weight,with three replicates in each group and five ewes in each replicate.The sheep in the control group were fed a corn straw as the roughage,the sheep in the experimental group were fed corn stalk leaves and pith as the roughage,and the sheep in the experimental group and the control group were fed the same concentrate.The pre-trial period was 10 days and the formal trial period was 90 days.The results showed that compared with the control group,the average daily gain of the experimental group increased by 10.58%,the average daily dry matter intake increased by 1.01%,and the feed to gain ratio decreased by 8.66%.The apparent digestibility rates of dry matter,crude protein,crude fat,neutral detergent fiber,acid detergent fiber,calcium,and phosphorus in the experimental group were 6.52%,8.69%,9.43%,8.17%,8.43%,5.87%,and 6.51%higher than those in the control group,respectively.Compared with the control group,the total protein content,globulin content,and alkaline phosphatase activity in the serum of sheep in the experimental group increased by 3.41%,10.70%,and 12.42%,respectively,and the urea nitrogen content decreased by 5.00%.The concentrations of serum immunoglobulin A,immunoglobulin M,immunoglobulin G,complement C3,and complement C4 in the experimental group were 5.89%,7.90%,7.58%,6.95%,and 2.66%higher than those in the control group,respectively.The experiment indicates that compared with the whole corn stalk,corn stalk leaves and pith are a kind of high quality roughage for herbivorous livestock.
基金项目
吉林省农业科学院创新工程项目(CXGC2021ZY037)
吉林省科技发展计划课题(20210404004NC)
国家公益性行业(农业)科研专项经费(201503134)
维普
万方数据