Effects of breed and dietary energy content within breed on growth performance, carcass and chemical composition and beef quality in Hereford and Simmental steers

1998 ◽  
Vol 78 (4) ◽  
pp. 533-541 ◽  
Author(s):  
I. B. Mandell ◽  
E. A. Gullett ◽  
J. W. Wilton ◽  
O. B. Allen ◽  
R. A. Kemp
Keyword(s):  
Chemical Composition ◽  
Growth Performance ◽  
Energy Content ◽  
Average Daily Gain ◽  
High Energy ◽  
Low Energy ◽  
Dietary Energy ◽  
Beef Quality ◽  
Daily Gain ◽  
Low Energy Diet

Forty-eight Hereford and 60 Simmental steers were used to evaluate breed differences as affected by dietary energy content on growth performance, carcass and chemical composition, and beef quality. Diets were based on corn silage, alfalfa haylage, whole corn, and SBM and were formulated to provide 2.52 to 2.81 Mcal kg−1 ME and 11.7 to 12.6% protein in the growing phase and 2.69 to 2.86 Mcal kg−1 ME and 9.7 to 10.4% protein in the finishing phase. Low- and high-ener-gy diets were formulated for each breed with the high-energy diet for Hereford serving as the low-energy diet for Simmental. Steers were slaughtered after attaining 8 to 10 mm backfat determined by ultrasound. Higher energy diets increased (P < 0.09) average daily gain (ADG) and feed efficiency within both breeds. Hereford gained more rapidly (P = 0.074) and were more (P = 0.001) efficient in converting feed to gain than Simmental. High-energy diets decreased (P = 0.001) days on feed for both breeds and increased (P = 0.001) carcass weights for Simmental. Otherwise, carcass and chemical composition were generally unaffected by dietary energy content. Simmental were heavier (P = 0.001) and leaner (P = 0.001) than Hereford while marbling classification and intramuscular fat content were similar (P > 0.10) between breeds. While shear force decreased (P = 0.043) feeding the low-energy diet to Simmental, other shear and palatability attributes were unaffected by dietary energy content or breed. Altering dietary energy content for Hereford and Simmental influenced growth performance without affecting carcass and chemical composition and beef quality. Key words: Hereford, Simmental, marbling, shear, palatability, growth performance, carcass

scholarly journals Ruminal Microbiota and Fermentation in Response to Dietary Protein and Energy Levels in Weaned Lambs

Animals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 109 ◽  
Author(s):  
Xiaokang Lv ◽  
Kai Cui ◽  
Minli Qi ◽  
Shiqin Wang ◽  
Qiyu Diao ◽  
...  
Keyword(s):  
Growth Performance ◽  
Energy Levels ◽  
High Energy ◽  
Metabolizable Energy ◽  
Low Energy ◽  
Dietary Energy ◽  
Ruminal Fermentation ◽  
Protein Levels ◽  
Energy Group ◽  
Low Energy Diet

Supplying sufficient nutrients, such as dietary energy and protein, has a great effect on the growth and rumen development of ruminants. This study was conducted to evaluate the effects of dietary energy and protein levels on growth performance, microbial diversity, and structural and physiological properties of the rumen in weaned lambs. A total of 64 two-month-old Hu lambs were randomly allotted to 2 × 2 factorial arrangements with four replicates and with four lambs (half male and half female) in each replicate. The first factor was two levels of dietary metabolizable energy (ME) density (ME = 10.9 MJ/Kg or 8.6 MJ/Kg), and the second factor was two levels of dietary crude protein (CP) content (CP = 15.7% or 11.8%). The trial lasted for 60 days. A low dietary energy level restrained the growth performance of lambs (p < 0.05). The ruminal concentration of acetate and the ratio of acetate to propionate increased but the propionate concentration decreased significantly with the low energy diet. However, the rumen morphology was not affected by the diet energy and protein levels. Moreover, a low energy diet increased ruminal bacterial diversity but reduced the abundance of the phylum Proteobacteria (p < 0.05) and genus Succinivibrionaceae_uncultured (p < 0.05), which was associated with the change in ruminal fermentation phenotypes. By indicator species analysis, we found three indicator OTUs in the high energy group (Succinivibrionaceae_uncultured, Veillonellaceae_unclassified and Veillonellaceae_uncultured (p < 0.01)) and two indicator OTUs in the low energy group (Bacteroidales_norank and Lachnospiraceae_uncultured (p < 0.01)). In conclusion, these findings added new dimensions to our understanding of the diet effect on rumen microbial community and fermentation response, and are of great significance for establishing the optimal nutrient supply strategy for lambs.

EFFECT OF ALTERNATION BETWEEN HIGH AND LOW ENERGY DIETS ON THE PERFORMANCE OF GROWING SWINE

1970 ◽  
Vol 50 (3) ◽  
pp. 611-616 ◽  
Author(s):  
P. R. CHEEKE ◽  
W. H. KENNICK
Keyword(s):  
Feed Intake ◽  
Compensatory Growth ◽  
Average Daily Gain ◽  
High Energy ◽  
Growing Pigs ◽  
Low Energy ◽  
Feed Consumption ◽  
Growth Responses ◽  
Daily Gain ◽  
Low Energy Diet

The response of growing pigs receiving a low energy diet (LE ration) to periodic exposures to a high energy diet (HE ration) was studied. Forty-eight Berkshire × Yorkshire barrows of approximately 23 kg body weight were divided into six equal groups receiving one of the following treatments: HE control, LE control, and alternations between the LE and HE rations in cycles of 5 days LE: 1 day HE. 4 days LE: 1 day HE, 3 days LE: 1 day HE, and 2 days LE: 1 day HE. The average daily gain of the HE control was significantly greater (P < 0.01) than that of the LE control. The alternated groups did not grow significantly faster than the LE control; thus, compensatory growth responses did not occur. Feed intake of the LE control was higher than that of the HE control. The alternated groups reduced their intake of the LE ration relative to the LE control, and consumed significantly greater amounts (P < 0.001) of the HE diet than did the HE controls. The pigs may have learned to anticipate their period of exposure to the HE diet, since the consumption of the HE ration as a proportion of the total feed intake tended to increase as the experiment progressed. In spite of the differences in amount and pattern of feed consumption, the calculated total energy intake was similar in all groups. The only carcass measurements significantly affected by treatment were dressing percentage and backfat thickness; the possible implications of these effects are discussed.

scholarly journals Performance, Carcass Percentage, and Production Cost for Awassi Lambs Fed High Energy Diet for Short Fattening Period

2017 ◽  
Vol 9 (9) ◽  
pp. 108
Author(s):  
Mysaa Ata ◽  
Fatima Al-Lataifeh ◽  
Mohammad Altarawneh
Keyword(s):  
Body Weight ◽  
Average Daily Gain ◽  
High Energy ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Low Energy ◽  
Feed Conversion ◽  
Daily Gain ◽  
Low Energy Diet ◽  
Awassi Lambs

An experiment was conducted to indicate the effect of feeding high energy diet for 45 days on male and female Awassi lambs’ performance, carcass percentage, and cost of production. A total of twenty four Awassi lambs (12 males, and 12 females) averaging 18.2±0.70 kg body weight were used. Lambs were assigned randomly to two different groups (groups A and B); each group had twelve lambs (6 males and 6 females) and fed two different diets (low energy diet and high energy diet). Feed intake, total gain, average daily gain and feed conversion ratio was calculated and body measurements (height and length) were recorded. Lambs were slaughtered at the end of experiment, to evaluate carcass percentage. Cost of production was calculated based on ingredients’ price at the time of the experiment. Final body weight, weight gain, and average daily gain were greater (p < 0.05); while feed conversion ratio was lower (p < 0.05) for lambs fed high energy diet than lambs fed low energy diet. Body length differences measured to be greater (p < 0.05) for male lambs fed high energy diet than other lambs. Fasted weight, hot carcass weight, and dressing percentage were higher (p < 0.05) for lambs fed the high energy diet. Cost of gain was lower (p < 0.05) for lambs in group B compared to lambs in group A. Therefore, the economical efficiency in this experiment was greater for lambs fed high energy diet than lambs fed the control diet during 45 days fattening period.

scholarly journals Effects of restricted feeding and re-alimentation of dietary protein or energy on compensatory growth of sheep

1970 ◽  
Vol 47 (3) ◽  
pp. 389-396
Author(s):  
W. Addah ◽  
A. Ayantunde ◽  
E.K. Okine
Keyword(s):  
Growth Performance ◽  
Dietary Protein ◽  
Feed Efficiency ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
High Energy ◽  
Utilization Efficiency ◽  
Eating Quality ◽  
Nutrient Utilization Efficiency ◽  
Daily Gain

The study investigated the effects of re-alimenting dietary protein or energy on growth, carcass characteristics and meat eating quality parameters of sheep. Twenty-seven intact rams (~9 months; 11.3 ± 0.5 kg) were randomly divided into three groups. Each group was fed a maintenance diet (MT) containing, on dry matter (DM) basis, 105 g/kg crude protein (CP) and 8.4 MJ/kg DM metabolizable energy (ME) for 30 days. Thereafter, they were continually fed the same MT or re-alimented with a high protein diet (HP) containing 169 g/kg DM CP and 9.3 MJ/kg ME or a high energy diet (HE) containing 123 g/kg DM CP and 10.6 MJ/kg ME for an additional 30 days to determine the effects of re-alimentation of protein or energy on their growth performance and carcass characteristics. During the initial 30-day period, DM intake (DMI) and growth performance were similar among the three groups. However, upon re-alimentation, average daily gain (ADG) and feed efficiency of sheep re-alimented with HP were greater than those maintained continually on MT or re-alimented with HE. Sheep on HP had higher feed efficiency, ADG and heavier carcasses than those fed MT or re-alimented with HE during the whole 60-day period. Growth of most viscera was less responsive to the restriction-re-alimentation feeding regimen except for the weights of the lungs, heart and intestines. Meat from sheep re-alimented with HE had a more intense ‘sheepy’ flavour than those fed MT or re-alimented with HP, but juiciness and tenderness were not affected. The higher ADG of sheep re-alimented with protein may be related more to enhanced efficiency of feed utilization than to higher DMI.Keywords: average daily gain, feed restriction, nutrient utilization efficiency, visceral organs

Supplementation of a low-energy diet with recombinant ferritin from Perinereis sp. can be beneficial to finishing pigs

2020 ◽  
Vol 100 (4) ◽  
pp. 631-639
Author(s):  
S. Serpunja ◽  
I.H. Kim
Keyword(s):  
Growth Performance ◽  
High Energy ◽  
Positive Control ◽  
Negative Control ◽  
Low Energy ◽  
Feed Ratio ◽  
Finishing Pigs ◽  
Dietary Treatments ◽  
Average Body ◽  
Low Energy Diet

A total of 90 finishing pigs [(Yorkshire × Landrace) × Duroc] with an average body weight (BW) of 50.02 ± 1.78 kg were used in a 10 wk experiment. The pigs were distributed into three dietary treatments replicated six times with five pigs (two barrows and three gilts) per pen. The treatment diets were a positive control (PC; high-energy diet), a negative control (NC; low-energy diet), and an NC + 0.05% ferritin diet (TRT1). The supplementation of ferritin in a low-energy diet tended (P = 0.06) to increase the BW at week 5 compared with pigs fed low-energy diets without ferritin. At week 5 and overall period, the gain-to-feed ratio of pigs fed high-energy diets was higher (P < 0.05) compared with pigs fed low-energy diets. The pigs receiving a ferritin-supplemented diet had a comparable growth performance to pigs fed high-energy diets. At week 10, fecal Lactobacilli counts of pigs fed high-energy diets were higher (P < 0.05) compared with pigs fed low-energy diets. The supplementation of low-energy diets with ferritin resulted in comparable growth performance to pigs fed high-energy diets and had no adverse effect on digestibility and fecal gas emissions. Thus, it seems beneficial to include ferritin in low-energy diets of finishing pigs.

Effect of nutritional regimen including limit feeding and breed on growth performance, carcass characteristics and meat quality in beef cattle

2012 ◽  
Vol 92 (3) ◽  
pp. 327-341 ◽  
Author(s):  
E. M. McGregor ◽  
C. P. Campbell ◽  
S. P. Miller ◽  
P. P. Purslow ◽  
I. B. Mandell
Keyword(s):  
Beef Cattle ◽  
Growth Performance ◽  
Meat Quality ◽  
Shear Force ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
High Energy ◽  
Ad Libitum ◽  
Limit Feeding ◽  
Daily Gain

McGregor, E M., Campbell, C. P., Miller, S. P., Purslow, P. P. and Mandell, I. B. 2012. Effect of nutritional regimen including limit feeding and breed on growth performance, carcass characteristics and meat quality in beef cattle. Can. J. Anim. Sci. 92: 327–341. The effects of nutritional management regimen and breed on growth performance, carcass attributes, and meat quality were evaluated in 68 British (BRIT) and Continental (CONT) crossbred steers, managed on one of three nutritional regimens: (1) ad libitum access to a 77% corn diet (ALGRAIN), (2) limit feeding initially of the 77% corn diet, followed by ad libitum access to the 77% corn diet (LFGRAIN), and (3) limit feeding initially of a 90% haylage diet, followed by ad libitum access to the 77% corn diet (LFHAYL). Nutritional regimen by breed interactions (P<0.02) were present for average daily gain, dry matter intake (DMI), gain to feed, and shear force. LFHAYL regimen decreased gains to a greater extent for BRIT steers than CONT steers managed on ALGRAIN or LFGRAIN. Feed intakes were similar across nutritional regimens for CONT steers, while DMI was depressed in BRIT on LFHAYL as compared with steers started on ALGRAIN or LFGRAIN. Gain to feed was greater in BRIT cattle on LFGRAIN vs. ALGRAIN, while gain to feed was similar in CONT started on grain (ALGRAIN, LFGRAIN). Shear force was lower for beef from LFHAYL BRIT vs. beef from BRIT on ALGRAIN or LFGRAIN, while the converse was true for CONT. Limit feeding of a high-energy diet may be appropriate for cattle of British background to reduce feed input costs, while ensuring tenderness.

scholarly journals Effects of diet, breed and slaughter endpoint on growth performance, carcass composition and beef quality traits in Limousin and Charolais steers

1997 ◽  
Vol 77 (1) ◽  
pp. 23-32 ◽  
Author(s):  
I. B. Mandell ◽  
E. A. Gullett ◽  
J. W. Wilton ◽  
O. B. Allen ◽  
V. R. Osborne
Keyword(s):  
Dry Matter ◽  
Average Daily Gain ◽  
Carcass Composition ◽  
Taste Panel ◽  
Dry Matter Intake ◽  
Longissimus Muscle ◽  
Dietary Energy ◽  
Beef Quality ◽  
Muscle Area ◽  
Daily Gain

Ninety-six Charolais and Limousin steers were used to evaluate 75% grain (whole barley or corn) diets and two slaughter endpoints (7 mm backfat or 568 kg liveweight) in an experiment designed to constrain carcass weights to under approximately 341 kg yet produce optimal beef quality. Each breed was represented by eight progeny from each of six sires. The trial was terminated after 281 d feeding regardless of individual steers attaining designated slaughter endpoints. Limited availability of dietary energy in whole-barley diets resulted in decreased (P < 0.01) average daily gain and increased (P < 0.01) dry matter intake, feed/gain and days on feed for barley- vs. corn-fed cattle. Charolais outgained (P < 0.05) Limousin but dry matter intake was similar on a g BW00.75 basis. Feeding to 568 kg liveweight was associated with high (P < 0.10) ADG and decreased (P < 0.05) feed/gain compared with feeding to 7 mm. Corn feeding increased (P < 0.001) carcass weights, fat deposition and longissimus muscle area. Lean deposition was greater (P < 0.01) in Limousin than Charolais. Taste panel assessment of tenderness, flavour and juiciness in longissimus muscle was generally not affected (P > 0.10) by diet, breed or slaughter endpoint. Twelve primal ribs from each of Agriculture Canada's marbling classifications (A, AA, AAA) were purchased and processed identically to ribs from the test cattle. Shear and tenderness scores were similar (P > 0.10) across test cattle and purchased ribs, despite intramuscular fat contents of 20.2, 27.1, 35.6 and 49.7 g kg−1 respectively, for test cattle and trace, slight and small marbled ribs. Slight and small marbled ribs did have higher (P < 0.05) taste panel scores for initial juiciness and flavour than ribs from the test cattle. While 26% of carcasses from test cattle graded Canada B1 due to either inadequate finish or marbling, similar tenderness and shear scores were probably due to age of test cattle at slaughter which averaged 481 ± 45 d plus the fact that all roasts were aged 7 d prior to freezing. Key words: Charolais, Limousin, marbling, fatness, palatability, carcass weight, beef cattle, tenderness

Crude protein requirements of large frame cattle fed two levels of energy as weaned calves or as backgrounded yearlings

1993 ◽  
Vol 73 (2) ◽  
pp. 315-325 ◽  
Author(s):  
J. J. McKinnon ◽  
R. D. H. Cohen ◽  
D. A. Christensen ◽  
S. D. M. Jones
Keyword(s):  
Energy Balance ◽  
Key Words ◽  
Crude Protein ◽  
Energy Levels ◽  
Average Daily Gain ◽  
High Energy ◽  
Carcass Composition ◽  
Low Energy ◽  
Protein Requirements ◽  
Daily Gain

Two trials were conducted to determine the crude protein (CP) requirements of large-frame (LF) cattle managed under two regimes and fed one of two energy levels. Trial 1 involved 216 recently weaned LF calves, while trial 2 involved 192 LF backgrounded yearling steers. In each trial, the cattle were fed diets formulated to one of two energy levels (11.17 and 11.88 MJ ME kg−1 DM) and one of six CP levels (11, 13, 15, 16, 17 and 19% DM basis). High-energy feeding increased (P < 0.05), average daily gain (ADG), average daily carcass gain (ADCG) and average daily fat gain (ADFG) of weaned calves but did not influence the performance of the backgrounded yearlings. Weaned calves fed 16, 17 or 19% CP had higher (P < 0.05) ADG than those fed 11%, while those fed 16% CP exhibited increased (P < 0.05) ADFG. ADG and ADCG of weaned calves and backgrounded yearlings and ADFG of weaned calves fed low-energy diets increased (P < 0.05) linearly with increasing dietary CP concentration. Daily carcass lean gain of weaned calves fed low-energy diets decreased in a quadratic manner (P < 0.05) as dietary CP level increased. No influence of dietary CP concentration was observed on carcass tissue gain of the backgrounded yearlings. It was concluded that energy balance of animals fed low-energy diets improved with CP supplementation and that current NAS-NRC (1984) CP requirements accurately predict performance of LF cattle. Key words: Steers, growth, carcass composition, energy, crude protein

Effects of grain source, silage level, and slaughter weight endpoint on growth performance, carcass characteristics, and meat quality in Angus and Charolais steers

2007 ◽  
Vol 87 (2) ◽  
pp. 167-180 ◽  
Author(s):  
P. L. McEwen ◽  
I. B. Mandell ◽  
G. Brien ◽  
C. P. Campbell
Keyword(s):  
Growth Performance ◽  
Shear Force ◽  
Average Daily Gain ◽  
Carcass Characteristics ◽  
Corn Silage ◽  
Beef Quality ◽  
Angus Cattle ◽  
Charolais Cattle ◽  
Cost Of Production ◽  
Daily Gain

Two growth performance trials were conducted to evaluate the effects of grain source (corn vs. barley), corn silage level (15 vs. 50%) and body weight (BW) at slaughter on growth performance, carcass characteristics, and beef quality. Gains were greater ( P < 0.01) feeding corn vs. barley to Angus cattle slaughtered at 550 or 600 kg, most likely due to greater (P < 0.02) feed intakes for corn-fed cattle. Despite greater dry matter intake (DMI; P < 0.01) and feed to gain ratios (P < 0.08) with 50% silage diets, cost of production was lower (P < 0.01) feeding 50 vs. 15% silage diets. Grain source by BW endpoint interactions (P < 0.06) were present for Angus steers due to greater average daily gain (ADG) and lower feed to gain and cost of production in corn-fed cattle slaughtered at 600 versus 550 kg, while the converse was the case for barley-fed cattle. Carcass characteristics and palatability attributes were generally not affected (P > 0.05) by grain source or silage level in the diet. Grain source by silage level by slaughter endpoint interactions (P < 0.08) were present for measures of tenderness (shear force and taste panel assessment of tenderness, chewiness, and rate of breakdown). Gains were not affected (P > 0.27) by grain source for Charolais cattle, while barley feeding decreased (P < 0.10) DMI, feed to gain, and costs of production versus corn feeding. Silage level in the diet did not affect (P > 0.10) any growth performance trait in Charolais cattle. Grain source generally did not affect (P > 0.10) most carcass characteristics and shear force with the Charolais steers. The feeding of the 15% silage diet decreased (P < 0.10) measures of leanness and muscling. Many carcass characteristics were affected (P < 0.02) by slaughter endpoint in Charolais steers, with values changing as BW at slaughter increased from 600 to 700 kg. Key words: Corn, barley, beef cattle, slaughter endpoint, shear force, palatability attributes

scholarly journals Dietary Energy Level Impacts the Performance of Donkeys by Manipulating the Gut Microbiome and Metabolome

2021 ◽  
Vol 8 ◽  
Author(s):  
Chongyu Zhang ◽  
Chen Zhang ◽  
Yunpeng Wang ◽  
Meiyu Du ◽  
Guiguo Zhang ◽  
...  
Keyword(s):  
Energy Level ◽  
Gut Microbiota ◽  
Growth Performance ◽  
Feed Efficiency ◽  
Metabolic Pathways ◽  
Animal Health ◽  
Average Daily Gain ◽  
High Energy ◽  
Dietary Energy ◽  
Group Feeding

Considerable evidence suggests that dietary energy levels and gut microbiota are pivotal for animal health and productivity. However, little information exists about the correlations among dietary energy level, performance, and the gut microbiota and metabolome of donkeys. The objective of this study was to investigate the mechanisms by which dietary energy content dictates the growth performance by modulating the intestinal microbiome and metabolome of donkeys. Thirty-six nine-month-old male Dezhou donkeys with similar body weights were randomly assigned to two groups fed low- or high-energy diets (LE or HE). The results showed that donkeys fed HE had increased (p &lt; 0.05) the average daily gain (ADG) and feed efficiency (G/F) compared with those that received LE diet. The gut microbiota in both groups was dominated by the phyla Firmicutes and Bacteroidetes regardless of the dietary energy level. However, feeding HE to donkeys significantly decreased (p &lt; 0.05) the ratio of Firmicutes to Bacteroidetes (F/B). Compared to the LE group, feeding HE specifically increased the abundances of unidentified_Prevotellaceae (p = 0.02) while decreasing the richness of unidentified_Ruminococcaceae (p = 0.05). Compared to the LE group, feeding the HE diet significantly (p &lt; 0.05) upregulated certain metabolic pathways involving the aspartate metabolism and the urea cycle. In addition, the increased bacteria and metabolites in the HE-fed group exhibited a positive correlation with improved growth performance of donkeys. Taken together, feeding the HE diet increased the richness of Prevotellaceae and upregulated growth-related metabolic pathways, which may have contributed to the ameliorated growth performance of donkeys. Thus, it is a recommendable dietary strategy to feed HE diets to fattening donkeys for superior product performance and feed efficiency.

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