Effect of additives on growing lambs fed on different levels of roughage concentrate ratio. 1- Lambs performance and carcass characteristics
Abstract: The experiment was conducted to study the effect of yeast culture on performance of lamb carcass characteristics and body composition.
Twenty five crossed (3/8 Finnish Landrace x 5/8 Ossimi) lambs of about 4 - 5 month age with on average of 19.91 Kg live body weight. This trail was extended for 126 days. Live body weights of lambs were recorded every two weeks
Lambs were fed their nutritional requirements according to NRC.
The lambs fed two roughage concentrate ratios were: 40 % concentrate: 60 % and 60% concentrate: 40 % roughage under each ratio three groups (control), + 5 gm Moreyeast and control + 1gm Dinaferm. Three lambs were slaughtered form each group. Samples were taken to determine lean, fat and bone percentages and chemical analysis
The data revealed that total gain was increased by yeast culture additives. Average daily gain was somewhat higher for groups fed 60 % concentrate with yeast culture. The feed conversion were more efficient with yeast culture than Control group, 40 % roughage + Dinaferm recorded the better fed conversion (6.44). The lambs take 60 % roughage with Dinaferm recorded low cost of total gain than the other groups.
The lambs fed 40 % roughage with 1 gm Deina ferm recorded high fasting weight (47.00kg). The same trend was also obtained concerning hot carcass weight. The lambs concentrate and low concentrate with Dinaferm yeast had the slightly figure same dressing percentage.
Results demonstrate that the reduction of concentrate level from 60 to 40 reduced all carcass cuts weight, while lamb takes Dinaferm yeast recorded high carcass cuts weight low concentrate level improved carcass cuts weight in lambs fed More yeast
Lambs takes yeast supplementation with high roughage increased liver and kidney in their carcass. The internal fat, kidney fat and tail fat weights recorded significant differences between lambs takes yeast culture and control group.
Lean, fat and bone weights were not affected by concentrate and roughage level in rations, and the lambs take 1 gm Dinaferm yeast recorded high weight of lean, fat and bone. The lean percent was 57.36 and 55.20 for 60 and 40 % roughage. The high roughage level with additive recorded16.0, 20.0 and 20.0cm 2 LD area for control.
There were no differences between source of yeast culture and levels of roughage in moisture and ash percentages, but protein percentage were higher with high roughage with yeast and lower with low roughage.
It could be recommended that yeast culture additives in growing lamb rations improve live body weight, fed conversation and carcass quality, under low concentrate and high roughage levels.
Keywords: crossbred lambs, yeast culture, roughage concentrate ratio, daily gain, carcass.
Publication year 2007
Pages 215-216
Availability location معهد بحوث الانتاج الحيوانى-شارع نادى الصيد- الدقى- الجيزة
Availability number
Organization Name
serial title Egyptian Journal Nutrition and Feeds
ISSN 1110-6360
Author(s) from ARC
External authors (outside ARC)
    جمال عبد الرحمن جامعة الزقازيق
    صلاح العياط جامعة الزقازيق
Agris Categories Animal feeding
AGROVOC
TERMS		 Carcass composition. Lambs. Performance testing.
Proposed Agrovoc daily gain;roughage concentrate ratio;yeast culture;crossbred lambs;
Publication Type Journal
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