Ruihang Zhang

Northwest A&F University

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Pengfei Lin

Northwest A&F University

Zuhui Li

Northwest A&F University

Haojie Yuan

Northwest A&F University

Haijing Li

Guangzhou Medical University

Hongyu Ren

Technical Institute of Physics and Chemistry

Ruixue Zhang

China Medical University

Hanbing Li

Zhejiang University of Technology

Xiao Jin-bang

Sichuan Agricultural University

Zheng Chang

China Agricultural University

Jinbang Xiao

Northwest A&F University

Cooperative Institutions

Northwest A&F University

Ministry of Agriculture and Rural Affairs

First Affiliated Hospital of Henan University

Agriculture and Forestry University

Sichuan Agricultural University

Beijing Institute of Technology

Ministry of Agriculture, Livestock, and Food Supply

Chinese Academy of Sciences

Zhejiang University

China Medical University

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Effects of Using Mechanical Brushes on the Productive Performance of Dairy Cows

Hanbing Li Ruixue Zhang Haijing Li Haojie Yuan Ruihang Zhang

Intensive farming can reduce production cost and maximize animal production efficiency; however, it also causes many adverse effects on the welfare of dairy cows. Mechanical brush is an automated grooming device that promotes the grooming behavior of dairy cattle, thereby helping them to alleviate stress. In the present study, we evaluated the effects of using mechanical brushes on the production performance of dairy cows by comprehensively analyzing their milk production, health status, and reproductive performance. The cows were assigned to six groups: 109 lactating dairy cows and 105 controls, 64 dry milk dairy cows and 49 controls, and 198 perinatal cows and 65 controls. Mechanical brush use was analyzed during the lactation, dry milk, and perinatal periods. Body surface cleanliness, lactation, disease incidence, and reproduction performance were assessed. Uterine involution, luteolysis, serum estradiol and progesterone levels were analyzed. We found an increasing trend in the daily utility time and usage frequency of the mechanical brush for each cow during the lactating period (7.73 ± 4.02 min/d; 2.90 ± 1.22 times/d, respectively), dry period (15.97 ± 14.16 min/d; 4.21 ± 2.91 times/d, respectively), and perinatal period (25.15 ± 19.05 min/d; 5.45 ± 3.83 times/d, respectively). The installation location of the mechanical brush significantly affected the frequency of usage during the different periods. The head was the preferred body part for using the mechanical brush during the lactation and dry periods (59.32% and 44.54%, respectively), while the hip was the main preferred grooming part during the perinatal period (40.17%). Additionally, mechanical brush use in lactating and dry dairy cows significantly improved the cleanliness of the body's surface (P < 0.05), and enhanced milk production of lactating cows (P < 0.01), particularly for cows with 4 and 5 parities. The uterine involution rate (70%), luteolysis rate (100%), and first service conception rate (35.94%) were better in the experimental groups than in the control groups (95%, 55%, and 30.61%, respectively); however, the differences were not significant. Moreover, mechanical brush use did not significantly affect the disease incidence rates of cows or the concentration of circulating steroid hormones. Overall, the time, frequency, and preferred body part of dairy cows that used the mechanical brush varied across different physiological stages. Thus, the use of mechanical brushes has the potential to improve the production performance of dairy cows and enhance sustainable and healthy development of pasture.

10.2139/ssrn.4737678

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Effects of Using Mechanical Brushes on the Productive Performance of Dairy Cows

Veterinary Sciences (2024)

Hanbing Li Ruixue Zhang Haijing Li Haojie Yuan Ruihang Zhang

Intensive farming can reduce production costs and maximize animal production efficiency; however, it also causes many adverse effects on the welfare of dairy cows. A mechanical brush is an automated grooming device that promotes the grooming behavior of dairy cattle, thereby helping to alleviate stress. In the present study, we evaluated the effects of using mechanical brushes on the production performance of dairy cows by comprehensively analyzing their milk production, health status, and reproductive performance. The cows were assigned to 6 groups: 109 lactating dairy cows (brush treatment) and 105 controls (without brush treatment), 64 dry milk dairy cows (brush treatment) and 49 controls (without brush treatment), and 198 perinatal cows (brush treatment) and 65 controls (without brush treatment). We found an increasing trend in the daily utility time and usage frequency of mechanical brushes for each cow during the lactating period (7.73 ± 4.02 min/d and 2.90 ± 1.22 times/d, respectively), dry period (15.97 ± 14.16 min/d and 4.21 ± 2.91 times/d, respectively), and perinatal period (25.15 ± 19.05 min/d and 5.45 ± 3.83 times/d, respectively) (

10.3390/vetsci11100481

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A Study of Peer Academic Support Mechanism Based on the Context of Dual-Line Integrated Teaching

Journal of Education Humanities and Social Sciences (2023)

Mengxiang Li Xiaoxiao Hao Yingmeng Ma Ruihang Zhang Zheng Chang

In recent years, students' academic pressure has grown exponentially due to various factors, including epidemics. This paper takes the Henan University of Chinese Medicine as an example and the educational requirements in implementing "the 14th Five-Year Plan for the Development of the Digital Economy" in higher Chinese medicine colleges and universities as the defined goal. The peer mutual aid mechanism is used as the main core, systematically elaborating the construction of the academic support mode of Chinese medicine colleges and universities under the academic background of dual-line fusion teaching. It is aimed to explore a method of academic support suitable for the current situation and help students get rid of academic pressure, which can contribute more to our society. It is argued that secondary colleges need to change the conventional idea of academic support. In the context of the rapid development of the Internet, we should take full advantage of the Internet development and combine it with the current education mode and student characteristics. As a result, we have proposed the "Two-multiple, One-precise, Both-balanced" concept of academic support. It provides a new way of understanding the academic support of Chinese medicine colleges under the background of dual-line fusion teaching.

Dual mode

Peer pressure

Learning development

Peer Instruction

10.54097/ehss.v23i.13932

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