통보리 분쇄 사료 급여가 비육후기 한우 채식행동에 미치는 영향

Abstract

통보리 분쇄 사료를 급여 수준별로 5개 처리구(C:무처리구, T1: 10% 첨가, T2: 20%, T3: 30%, T4: 40% 첨가)를 두고, 비육후기 5개월 동안(각 처리 구별 6두, 총 30두 공시) 처리구별로 각각 급여한 후 48시간 육안 관찰 한 그 결과를 요약하면 다음과 같다. 총 채식량(농후사료+조사료)은 T4 (9.96kg) > T1 (9.42kg) > C (9.22kg) > T3 (8.91kg) > T2 (8.51kg) 순으로 높게 나타났다(P<0.05). 채식시간은 T4 > T3 > C > T1 > T2구 순이였으며 (P<0.01), 반추시간은 T4 > T1 > C > T3 > T2구 순으로 나타났다 (P<0.05). 그러나 휴식시간은 반추시간과 반대로 T2 > T1 > C > T3 > T4 순으로 나타났다(P<0.01). 채식시간과 반추시간을 합한 저작 시간은 T4 (392.5 min.) > T3 (331.4 min.) > C (329.4 min) > T1 (327.2 min) > T2 (276.3 min.) 순으로 나타났다(P<0.01). 식괴수, 총 저작수, 식괴당 저작수, 사료가치지수는 각각 190.9개, 9,129.4회, 47.8회, 39.4 (분/kg)으로 T4구가 가장 높게 나타났다(P<0.01). 식괴당 반추시간은 C구가 가장 높고 T3구가 가장 낮게 나타났으며(P<0.05), 분당 식괴수는 T3 가장 높고 C구가 가장 낮게 나타났다(P<0.05). 채식율과 저작효율은 T2구에서 가장 높았지만(P<0.01, 0.05), 반추효율에서는 T1구가 가장 높았다. 그리고 군 행동에서는 휴식(78.5%) > 반추(11.4%) > 채식(10.1%)순으로, 군 행동 중 서서 휴식은 T3 > C > T2 >T1 >T4 구 순으로 높게 나타났다. This study was carried out to investigate the effect of dietary supplementation of whole grain barley cracked feed on eating behaviors of Hanwoo steers during finish fattening period. Thirty Hanwoo steers (28 months old) were assigned to five dietary treatments: control (C: normal concentrate as a basal diet), and four feeding groups [T1: 10% addition of whole grain barley cracked (WGBC) feed, T2: 20% addition of WGBC, T3: 30% addition of WGBC and T4: 40% WGBC during the finish fattening period, respectively]. The results of eating behaviors for 48 hours are summarized as follows: Total intake (roughage + concentrate) was higher in the order of T4 > T1 > C > T3 > T2 (P<0.05). Eating time was higher in the order of T4 > T3 > C > T1 > T2 (P<0.01). Ruminating time was higher in the order of T4 > T1 > C > T3 > T2 (P<0.05). But resting time was higher in the order of T2 > T1 > C > T3 > T4. The chewing time including eating and ruminating time was higher in the order of T4 > T3 > C > T1 > T2 (P<0.01). Number of bolus, number of total chews, number of chews/bolus and feed value index were highest in T4 (P<0.05). Ruminating time per bolus was highest in C, and T3 was the lowest (P<0.05) as compared to others. Number of bolus per minute was highest in T3, and C is the lowest (P<0.05). Eating rate and chewing efficiency were highest in T2 (P<0.01, 0.05), but ruminating efficiency was higher in T1 than others. The group behavior was higher in the order of resting(78.5%) > ruminating(11.4%) > eating(10.1%). The stand resting of group behavior was higher in the order of T3 > C > T2 > T1 > T4.