RESEARCH PAPER

Effects of Replacing Natural Grass Hay with Mixed Hay of Urtica cannabina L. and Chenopodium acuminata on Growth Performance, Body Size Indexes and Nutrient Apparent Digestibility of Mongolian Bulls

  • LIU Wuyun ,
  • Sarula ,
  • QI Chelimuge ,
  • YANG Jingfeng ,
  • DONG Wu ,
  • DARDINSUREN Gurbazar ,
  • NIU Huaxin
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  • 1. College of Animal Science and Technology, Inner Mongolia Minzu University, Tongliao 028000, China;
    2. Mongolian University of Life Science, School of Animal Science & Biotechnology, Ulaanbaatar 17024;
    3. Inner Mongolia Key Laboratory of Toxicant Monitoring and Toxicology, Inner Mongolia Minzu University, Tongliao 028000, China

Received date: 2021-11-02

  Online published: 2022-05-14

Abstract

The purpose of this experiment was to explore the effects of replacing natural grass hay with mixed hay of Urtica cannabina L. and Chenopodium acuminata on growth performance, body size indexes and nutrient apparent digestibility of Mongolian bulls. Thirty healthy Mongolian bulls with similar body weight of (197±10) kg were randomly divided into 3 groups with 5 replicates per group and 2 bulls per replicate. Bulls in the 3 groups were fed three total mixed rations with different forage sources——natural grass hay, mixed hay A (Urtica cannabina L.:Chenopodium acuminata=3:10) and mixed hay B (Urtica cannabina L.:Chenopodium acuminata=1:1). The experiment included a 10-day pre-test period and a 30-day trial period. The results showed as follows:1) the final body weight and average daily gain of Mongolian bulls in mixed hay A group and mixed hay B group were significantly higher than those in natural grass hay group (P<0.05), and the average daily gain was increased by 24.53% and 20.75% compared with natural grass hay group, respectively. The feed/gain of Mongolian bulls in mixed hay A group and mixed hay B group was lower than that in natural grass hay group (P<0.05), and there was no significant difference between mixed hay A group and mixed hay B group (P>0.05). At the beginning of the experiment, the body size indexes of Mongolian bulls had no significant difference among 3 groups (P>0.05); at the end of the experiment, the body oblique length and hip bone width of Mongolian bulls in mixed hay B group were significantly higher than those in natural grass hay group and mixed hay A group (P<0.05); there were no significant differences in other body size indexes of Mongolian bulls among groups (P>0.05). 3) The apparent digestibility of crude protein, crude fat, neutral detergent fiber, calcium and phosphorus in mixed hay A group and mixed hay B group was significantly higher than that in natural grass hay group (P<0.05). In summary, under the conditions of this experiment, replacing the natural grass hay with mixed hay of Urtica cannabina and Chenopodium acuminata (3:10 or 1:1) in the total mixed ration can improve the nutrient apparent digestibility and growth performance of Mongolian bulls, and improve the growth and development of bone and muscle.

Cite this article

LIU Wuyun , Sarula , QI Chelimuge , YANG Jingfeng , DONG Wu , DARDINSUREN Gurbazar , NIU Huaxin . Effects of Replacing Natural Grass Hay with Mixed Hay of Urtica cannabina L. and Chenopodium acuminata on Growth Performance, Body Size Indexes and Nutrient Apparent Digestibility of Mongolian Bulls[J]. Chinese Journal of Animal Nutrition, 2022 , 34(5) : 3023 -3031 . DOI: 10.3969/j.issn.1006-267x.2022.05.031

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