China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (4): 1041-1049.doi: 10.16431/j.cnki.1671-7236.2020.04.009

• Animal Nutrition and Feed Science • Previous Articles     Next Articles

Effects of Ginkgo Leaves on Growth,Slaughter Performance and Nutrient Ultilization in Sheep

HU Gaojie1, YANG Gaiqing2, WANG Linfeng1, FU Tong1, LIAN Hongxia1, GAO Tengyun1, LI Ming1, WANG Fuzhou3   

  1. 1. Key Laboratory of Animal Biochemistry and Nutrition, Ministry of Agriculture and Rural Affairs, College of Animal Husbandry and Medicine Engineering, Henan Agricultural University, Zhengzhou 450002, China;
    2. Modern Experimental Technology and Management Center, Henan Agricultural University, Zhengzhou 450002, China;
    3. Zhengzhou Sainuo Technology Co., Ltd., Zhengzhou 450041, China
  • Received:2019-07-12 Online:2020-04-20 Published:2020-04-17

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

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