银杏叶对绵羊生长、屠宰性能及营养物质利用率的影响

doi:10.16431/j.cnki.1671-7236.2020.04.009

摘要/Abstract

摘要： 为研究银杏叶对绵羊生长性能、屠宰性能、营养物质利用率及血清生化指标的影响，本研究选择体重35 kg左右的3~4月龄杜泊公羊21只，随机分为3组，每组7只羊，分别为对照组（饲喂无银杏叶的日粮）、低水平银杏叶组（L组，饲喂含7.5%银杏叶的日粮）、高水平银杏叶组（H组，饲喂含15%银杏叶的日粮）。定期称重测定动物生长性能；通过消化代谢试验测定饲料养分利用率；采集血液检测血液相关生化指标；试验结束后测定屠宰性能。结果表明：银杏叶对绵羊的平均日采食量（ADFI）、末重和平均日增重（ADG）无显著影响（P > 0.05）。消化代谢试验表明，低水平银杏叶组的能量消化率和沉积率较对照组显著降低（P < 0.05）；高水平银杏叶组氮沉积率高于其他两组，与低水平组差异显著（P < 0.05）；银杏叶对钙、磷的利用率没有显著影响（P > 0.05）。血液生化指标检测结果表明，低水平银杏叶组的谷草转氨酶活性显著低于对照组（P < 0.05），高水平组与对照组差异不显著（P > 0.05）；低水平银杏叶组的总蛋白和球蛋白含量较高水平组显著提高（P < 0.05），高剂量组较对照组差异不显著（P > 0.05）。银杏叶对胆固醇和甘油三酯虽有一定的降低作用，但差异不显著（P > 0.05）。屠宰试验结果表明，与对照组相比，低水平和高水平银杏叶组绵羊的胴体重和净肉重显著降低（P < 0.05），屠宰率和净肉率在各组间差异不显著（P > 0.05）；银杏叶组的肾周脂肪重均显著低于对照组（P < 0.05），低水平组和高水平组较对照组分别降低了31%和49%。综上，银杏叶对绵羊的消化代谢、饲料养分利用率和屠宰性能均有一定的影响，能显著降低肾周脂肪的含量，其效果与饲喂量有关。

关键词: 银杏叶; 绵羊; 生长性能; 消化代谢; 肉品质

Abstract: Ginkgo leaves contain not only conventional nutrients,but also special medicinal active ingredients such as flavonoids and azlactones,which can be used as a special feed resource.This experiment was conducted to study the effects of Ginkgo leaves feed on growth performance,slaughtering performance,nutrient digestion and utilization,and serum biochemical indexes in sheep.Twenty-one Dupo hybrid rams weighted about 35 kg were randomly divided into three groups,which named control group (fed diet without Ginkgo leaves),low-level Ginkgo leaves group group (L group,7.5% Ginkgo leaves) and high-level Ginkgo leaves group (H group,15% Ginkgo leaves).The body weights of Dupo rams were weighed every two weeks,and digestion and metabolism test and blood collection were carried out.Sheep were slaughtered at the end of the experiment to detect the carcass traits.The results showed that Ginkgo leaves had no significant effect on average daily feed intake (ADFI),final weight and average daily gain (ADG) (P > 0.05).The energy digestibility and deposition rates of low-level Ginkgo leaves group were significantly lower than those of control group (P < 0.05).The nitrogen deposition rate of high-level Ginkgo leaves group was higher than the other two groups,and the difference with low-level group was significantly (P < 0.05).Ginkgo leaves had no significant effect on digestibility and retention of calcium and phosphorus (P>0.05).Biochemical test results showed that AST activity in low-level group was significantly lower than that in control group (P < 0.05),and high-level group had no significant change compared with control group (P > 0.05).The serum total protein and globulin contents in low-level group were significantly higher than those in control group (P < 0.05),but there was no significant difference between high-level group and control group (P > 0.05).There was no significant difference in total cholesterol (TC) and triglyceride (TG) levels among three groups (P > 0.05),but they had a certain reduction trend in two Ginkgo groups.The slaughter test showed that the carcass weight and net meat weight of sheep fed with Ginkgo leaves were significantly reduced (P < 0.05),and there was no significant difference in slaughter rate and net meat rate among three groups (P > 0.05).Compared with control group,the perirenal fat weights of Ginkgo leaves groups were significantly lower than control group (P < 0.05),were 31% and 49% lower than control group,respectively.In conclusion,Ginkgo leaves had certain effects on nutrients digestion and metabolism,and significantly reduce the perirenal fat in carcass,and the specific effect was related to the amount of feeding.

Key words: Ginkgo leaves; sheep; growth performance; digestion and metabolism; carcass traits

中图分类号:

S816.5

胡高杰, 杨改青, 王林枫, 付彤, 廉红霞, 高腾云, 李明, 王福州. 银杏叶对绵羊生长、屠宰性能及营养物质利用率的影响[J]. 中国畜牧兽医, 2020, 47(4): 1041-1049.

HU Gaojie, YANG Gaiqing, WANG Linfeng, FU Tong, LIAN Hongxia, GAO Tengyun, LI Ming, WANG Fuzhou. Effects of Ginkgo Leaves on Growth,Slaughter Performance and Nutrient Ultilization in Sheep[J]. China Animal Husbandry and Veterinary Medicine, 2020, 47(4): 1041-1049.

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