Effects of Different Proportions of Steam-Flaked Corn Substituted for Milling Corn in Diets on Growth Performance, Slaughter Performance, Beef Quality and Conventional Chemical Components of Luxi Crossbred Steers

ZHANG Yawei, WEI Manlin, WU Hao, ZHOU Zhenming, MENG Qingxiang

doi:10.3969/j.issn.1006-267x.2017.04.011

2017 , Vol. 29 >Issue 4: 1167 - 1174

DOI: https://doi.org/10.3969/j.issn.1006-267x.2017.04.011

Molecular Nutrition

Effects of Different Proportions of Steam-Flaked Corn Substituted for Milling Corn in Diets on Growth Performance, Slaughter Performance, Beef Quality and Conventional Chemical Components of Luxi Crossbred Steers

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1. State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
2. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao 028000, China

Received date: 2016-10-13

Online published: 2017-04-14

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Abstract

This study was conducted to evaluate the effects of different proportions of steam-flaked corn (SFC) substituted for milling corn (MC) in diets on growth performance, slaughter performance, beef quality and conventional chemical components of Luxi crossbred steers. Forty-eight 21-month-old Luxi crossbred steers with the body weight of (459.6±10.3) kg were randomly divided into four groups according to body weight, each group had twelve steers, which were housed in three pens with four steer per pen, respectively. Four different diets were randomly assigned to four groups:SFC0, SFC33, SFC67 and SFC100, which represented the 0, 33%, 67% and 100% of MC substituted with SFC in diets, respectively. The content of corn in diets was 35.85%. The experiment lasted for 180 days including two stages. The first stage lasted for 84 days including 14 days for adaptation and 70 days for sampling, and the growth performance was measured at the end of trial. The second stage lasted for 96 days which was used to fat steers, and the slaughter performance, beef quality and conventional chemical components were measured at the end of trial. The results showed as follows:the average daily gain (ADG) of SFC100 group was increased by 14.95%, 25.77% and 38.20% compared with SFC67, SFC33 and SFC0 groups, respectively, and there were significant differences among SFC100, SFC67 and SFC0 groups (P<0.05). Meanwhile, the ratio of feed to gain of SFC33, SFC67 and SFC100 groups was decreased by 7.73%, 17.01% and 25.34% compared with SFC0 group, respectively, and it had significant difference among groups (P<0.05). Except that ribeye area of SFC100 group was significantly greater than that of SFC0 group (P<0.05), different proportions of SFC substituted for MC in diets had no significant effects on the other slaughter performance, beef quality and conventional chemical components (P>0.05). Furthermore, the final body weight, ADG, ribeye area and marbling grade increased linearly (P<0.05), while the ratio of feed to gain and dressing percentage decreased linearly (P<0.05) as the increase of substitution proportion of SFC in diets. The results indicate that MC total substitute with SFC can significantly improve the ADG, feed efficiency and quality grade of quality beef cuts to some extent of Luxi crossbred steers, while has no effects on slaughter performance, beef quality and conventional chemical components.

Key words： steam-flaked corn; milling corn; Luxi crossbred steers; growth performance; slaughter performance; beef quality; beef conventional chemical components

Cite this article

ZHANG Yawei, WEI Manlin, WU Hao, ZHOU Zhenming, MENG Qingxiang . Effects of Different Proportions of Steam-Flaked Corn Substituted for Milling Corn in Diets on Growth Performance, Slaughter Performance, Beef Quality and Conventional Chemical Components of Luxi Crossbred Steers[J]. Chinese Journal of Animal Nutrition, 2017 , 29(4) : 1167 -1174 . DOI: 10.3969/j.issn.1006-267x.2017.04.011

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