Replacement of corn with rice grains did not alter growth performance and rumen fermentation in growing Hanwoo steers

Asian-Australasian Journal of Animal Sciences

Hanbeen Kim¹  Byeongwoo Kim¹  Joonbeom Moon¹  Sungjae Yang¹  Jakyeom Seo¹  Daekyum Yoo¹  Seyoung Lee²  Youl-Chang Baek³ 

[1] Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea;Division of Animal Husbandry, Yonam College, Cheonan 31005, Korea;National Institute of Animal Science, Rural Development Administration, Wanju 55365, Korea;

关键词: rice grains;    total mixed rations;    fermentation;    growth performances;   

DOI  :  10.5713/ajas.19.0691

来源: DOAJ

【 摘 要 】

Objective This study was realized to evaluate the nutritional value of rice grains as a replacement for corn grains in the diet of growing Hanwoo steers. Methods Two experimental diets were prepared: i) Corn total mixed ration (TMR) consisting of 20% corn grains and ii) Rice TMR consisting of 20% rice grains, in a dry matter (DM) basis. These treatments were used for in vitro rumen fermentation and in vivo growth trials. In the rumen fermentation experiment, the in vitro DM digestibility (IVDMD), in vitro crude protein digestibility (IVCPD), in vitro neutral detergent fiber digestibility, pH, ammonia nitrogen, and volatile fatty acids (VFA) were estimated at 48 h, and the gas production was measured at 3, 6, 12, 24, and 48 h. Twenty four growing Hanwoo steers (9 months old; body weight [BW]: 259±13 kg) were randomly divided into two treatment groups and the BW, dry matter intake (DMI), average daily gain (ADG), and feed conversion ratio (FCR) were measured. Results The in vitro experiment showed that the IVDMD, IVCPD, and VFA production of the Rice TMR were higher than those of the Corn TMR (p<0.05). The growth trial showed no differences (p>0.05) in the final BW, ADG, DMI, and FCR between the two TMRs. Conclusion The use of rice grains instead of corn grains did not exhibit any negative effects on the rumen fermentation or growth performance, thereby rice grains with a DM of less than 20% could be used as a starch source in the diet of growing steers.

【 授权许可】

Unknown