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http://dx.doi.org/10.5333/KGFS.2019.39.2.97

Feeding Effects of Whole Crop Rice based TMR on Growth Performance and Carcass Characteristics of Hanwoo Steers  

Kim, Jong Geun (Graduate School of International Agricultural Technology, SNU)
Zhao, Guoqiang (Graduate School of International Agricultural Technology, SNU)
Liu, Chang (Graduate School of International Agricultural Technology, SNU)
Nan, Wei Sheng (Graduate School of International Agricultural Technology, SNU)
Kim, Hak Jin (Research Institute of Eco-friendly Livestock Science, GBST, SNU)
Kim, Kyoung Hoon (Graduate School of International Agricultural Technology, SNU)
Ahn, Eok Geun (National Institute of Crop Science)
Min, Hyung-Gyu (Sancheong Agricultural Development & Technology Center)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.39, no.2, 2019 , pp. 97-104 More about this Journal
Abstract
This experiment was conducted to investigate the effect of whole crop rice (WCR) based TMR on growth performance and carcass characteristics of Hanwoo steers. WCR "Yeongwoo"was harvested at yellow ripen stage and ensiled for 60 days. The crude protein (CP), acid detergent fiber (ADF), neutral detergent fiber (NDF), in vitro dry matter digestibility (IVDMD) and total digestible nutrient (TDN) content was 8.4 %, 28.0 %, 53.8 %, 72.4 % and 66.8 %, respectively. For silage quality, pH was 4.37 and lactic and butyric acid content were 2.84 and 0.04 % in DM. Sixteen Hanwoo steers (8-mon-old) were allocated into either a control (commercial TMR) and WCR-TMR (WCR-based TMR) group. The TMR were fed according to the feeding stage phase: growing (Initiate~14 month), early fattening (15 month~21 month) and late fattening (22 month~30 month). The body weight of control group increased (P<0.05) until early fattening stage, but late growing stage of WCR-TMR group was higher than that of control (P<0.05). Average daily gain (ADG) was significantly greater (P<0.05) in WCR-TMR group (total 0.78 kg/head) compared to control (total 0.66 kg/head) except for late fattening stage. The marketing weight and carcass weight were higher in WCR-TMR group (726 vs 765 kg; 417.8 vs 450.4 kg). The back fat thickness (11.75 vs 13.00 mm), Longissimus dorsi area (88.00 vs $89.88cm^2$) and yield index (65.87 vs 64.30) were not different between the two groups (P>0.05) and also no difference in meat yield grade (A : B : C = 2 : 4 : 2). Marbling score (4.00 vs 4.13), meat color (4.75 vs 4.75), fat color (3.13 vs 2.88), texture (1.25 vs 1.50) and maturity (2.00 vs 2.00) were not significant difference between the two groups and meat quality grade ($1^{{+}{+}}:1^+:1:2:3=0:2:4:2:0$) was also not different. In conclusion, TMR feeding based on WCR silage showed superiority in carcass yield and ADG compared to control TMR. It is considered that the use of WCR for feed is a necessary option for the substitution of the imported forages and the government's policy for rice production adjustment.
Keywords
Whole crop rice; TMR; Silage; Average daily gain; Meat quality; Yield;
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Times Cited By KSCI : 6  (Citation Analysis)
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