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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0519    [Accepted] Published online October 22, 2019.
Characteristics of sawdust, wood shavings and the mixture of sawdust and wood shavings by the species of pine trees, and their usefulness as bedding materials for Hanwoo cattle
Gyu Chul Ahn1  , Sun Sik Jang2  , Kang Yeon Lee3  , Youl Chang Baek2  , Young Kyoon Oh2  , Keun Kyu Park4,* 
1Department of Animal and Food Science, University of Kentucky, Kentucky 40506, USA
2National Institute of Animal Science, Rural Development Administration, Jeonbuk 55365, Korea
3Semi Feed Tech. Co. Ltd., Rm 602, Shinjin Building, Seoul 06677, Korea
4Department of Animal Science and Technology, Konkuk University, Seoul 05029, Republic of Korea
Correspondence:  Keun Kyu Park, Tel: +82-2-450-3661, Fax: +82-2-455-1044, Email: kkpark@konkuk.ac.kr
Received: 26 June 2019   • Revised: 18 September 2019   • Accepted: 14 October 2019
Abstract
Objective
This study was conducted to evaluate the physicochemical properties and changes in moisture concentrations of bedding materials under the conditions of rearing Korean Hanwoo cows.
Methods
Two experiments were conducted to investigate the physicochemical characteristics (Exp. I) and usefulness as beddings for rearing cattle (Exp. II) by the type of beddings such as sawdust (SD), wood shavings (WS) and sawdust + wood shavings (S+W; 1:1 in volume), and the species of pine trees from different countries of origins (China, Pinus armandii, AR; Vietnam, Pinus kesiya, KE; U.S.A, Pinus rigida, RI).
Results
In Exp. I, SD-AR showed the largest proportion (78.3%) of fine particles (250 μm + below 250 μm) and the highest bulk density (208 kg/m3) among treatments (p < 0.05). Both S+W-RI (713%) and -KE (701%) of water absorption capacity at 24 h were the highest among treatments (p < 0.05) and higher than those of SD or WS alone within each species of pine trees (p < 0.05). Moisture evaporation rates (%) at 12 h were ranged from 52.3 to 60.8 for SD, 69.9 to 74.4 for WS, and 72.3 to 73.5 for S+W. Total amounts (mg/m2) of ammonia emissions were the lowest (p < 0.05) in KE species among the pine species within each type of bedding material, having higher ability of ammonia absorption. In Exp II, KE species in both Side A and B had lower moisture concentrations (%) than other species. Regardless of types of beddings except SD-AR, moisture concentrations of beddings within a pen were higher (p < 0.01) at side A than B.
Conclusion
The KE species has better physical characteristics than other beddings and more useful for rearing Hanwoo cattle than other beddings, probably caused by the differences in the method and degree of wood processing rather than the species.
Keywords: Animal Welfare; Bedding; Sawdust; Wood Shavings; Ammonia Emission


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