Effect of pasture grazing and concentrate feeding levels for 6 months of growing steps on growth performance and carcass characteristics in autumn born Hanwoo steers

Kang, S.W.; Im, S.K.; Woo, J.S.; Jeong, J.W.; Son, Y.S.

Journal of Animal Science and Technology 43(5): 681-694

2001


ISSN/ISBN: 2055-0391
Accession: 003420120

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Abstract
The effect of pasture grazing and concentrate feeding levels for 6 months of the growing steps on autumn born Hanwoo [Korean Native] steers was investigated. The feeding trial consisted of 3 treatment groups: T1 (full feeding of concentrate and hay for 18 months); T2 (pasture grazing with 1.5% of apparent body weight in concentrate for 6 months and concentrate full feeding for pre- and post-pasture grazing); and T3 (1.5% of apparent body weight and full feeding in concentrate at pre- and post-grazing period, respectively). Average daily gains increased with T1 obtaining the highest followed by T3 and T2. TDN intakes required per unit of kilogram-gain were on the average 8.347 kg and was observed to decrease in this order T2, T1 and T3. Dressed carcass and retailed cut percentage were on the average 62.1 and 64.5%, respectively. A significant difference (P<0.05) was observed and dressed carcass was highest in T3 followed by T2 and T1. Retailed cut percentage decreased in this order T2, T3 and T1. Appearance rate of first grade meat quality was 62.5 to 87.5% with the highest value obtained from T3, followed by T2 and T1. Backfat thickness and marbling score were on the average 8.4 mm and 4.8, respectively. Highest backfat thickness was obtained from T1 followed by T2 and T3, whereas marbling score was highest in T1, followed by T3 and T2. The percentage of moisture, protein, fat and ash were on the average 66.6, 19.6, 11.6 and 0.92%, respectively. The rate of moisture, protein and ash were higher in T2 compared to T3 and T1. In contrast, fat was lower in T2 compared to T3 and T1. Income was higher in T2 and T3 than in T1. Moreover, income of T2 increased by 29% compared to T1.