QTLs associated with dry matter intake, metabolic mid-test weight, growth and feed efficiency have little overlap across 4 beef cattle studies

The objective of this study was to determine the effects of restricted feeding strategies on performance of growing and finishing dairy bulls. The feeding experiment comprised in total 32 Finnish Ayrshire bulls with an initial mean live weight (LW) of 122 kg and age of 114 days. Feeding treatments were silage ad libitum and daily barley allowance of 93 g kg-1 LW0.60 (A); restricted feeding (R) at 0.80 × A; increasing feeding (I) similar to R until LW of 430 kg and thereafter similar to A; and decreasing feeding (D) similar to A until LW of 430 kg and thereafter similar to R. Restricted feeding strategies decreased daily dry matter intake and LW gain and increased the time to reach the target carcass weight (300 kg). Bulls on I exhibited compensatory growth. There were no significant differences in feed efficiency between the treatments. The present experiment indicates that silage intake ad libitum and supplemented with concentrate resulted in most effective beef production.

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Intake of Tifton 85 chopped hay have positive effects on protein digestibility, and milk production and composition of Lacaune sheep

Research Society and Development ◽

10.33448/rsd-v9i8.5005 ◽

2020 ◽

Vol 9 (8) ◽

pp. e347985005

Author(s):

Alexandre Bernardi ◽

Antonio Waldimir Leopoldino da Silva ◽

Catia Capeletto ◽

Felipe Junior Portela da Silva ◽

Renata Cristina Defiltro ◽

...

Keyword(s):

Milk Production ◽

Feed Efficiency ◽

Dry Matter ◽

Protein Concentration ◽

Protein Digestibility ◽

Dry Matter Intake ◽

Serum Concentrations ◽

Positive Effects ◽

Feed Digestibility ◽

D 12

This study compared the effects of unchopped and chopped hay on milk production and composition, feed digestibility, and physiology of Lacaune sheep. Eighteen ewes were stratified by parity (two or three), days of lactation (60 ± 3.7 days), and milk production (1.04 L/ewe/day), and were randomly assigned to 1 of 2 treatments: 1) Unchopped or 2) Chopped Tifton 85 hay. Corn silage and concentrate were also provided. Chopped hay ewes gave lower (P≤0.01) dry matter intake and greater (P=0.02) crude protein digestibility. No effects of treatment were detected (P≥0.38) for the digestibility of dry matter, or of neutral and acid detergent fibers. Chopped hay ewes had greater (P≤0.01) milk production (d 7 and d 12), lactation persistence, and feed efficiency. Ewes eating chopped hay had greater (P=0.03) protein concentration in their milk. However, there were no effects of treatment × day and treatments (P≥0.16) for concentrations of fat, lactose, minerals, deffated dry extract, or density. Ewes eating chopped hay presented lower (P<0.01) serum concentrations of urea and tended to have lower (P=0.10) serum concentrations of glucose only on d 12. However, there were no effects of treatment × day and treatments (P≥0.16) for serum concentrations of total protein, albumin, globulin, triglycerides, or cholesterol. These data suggest that chopped hay promotes lower dry matter intake and serum concentrations of glucose and urea, but improves milk production, lactation persistence, feed efficiency, and protein concentration.

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Effects of the association between whole cottonseed and calcium salts of fatty acids on nutrient intake, feedlot performance, and carcass characteristics of Bos indicus animals offered a high-concentrate diet

Translational Animal Science ◽

10.1093/tas/txab207 ◽

2021 ◽

Author(s):

Leonardo R. Müller ◽

Daniel I C. G. Gouvêa ◽

André F. Francischinelli ◽

Guiherme D. A. Alvarenga ◽

Pablo C Castagnino ◽

...

Keyword(s):

Fatty Acids ◽

Soybean Oil ◽

Feed Efficiency ◽

Dry Matter ◽

Bos Indicus ◽

Carcass Characteristics ◽

Dry Matter Intake ◽

Feedlot Performance ◽

Calcium Salts ◽

Whole Cottonseed

Abstract This experiment evaluated the effects of feeding whole cottonseed (WC) and/or calcium salts of fatty acids (CSFA) on dry matter intake (DMI), performance, and carcass characteristics of Bos indicus animals receiving a high-concentrate diet during the finishing phase. On day 0, 96 Nellore bulls were blocked according to initial shrunk body weight (BW; 302 ± 26.7 kg) into group pens (4 animals/pen) and, within blocks, pens were randomly assigned to receive: 1) 15% of WC and 2% of CSFA [dry matter (DM) basis] of palm, cottonseed, and soybean oil (15WC; n = 6), 2) 10% of WC and 3% of CSFA (DM basis) of palm, cottonseed, and soybean oil (10WC; n = 6), 3) 5% of WC and 4% of CSFA (DM basis) of palm, cottonseed, and soybean oil (5WC; n = 6), and 4) 0% of WC and 5% of CSFA (DM basis) of palm, cottonseed, and soybean oil (0WC; n = 6). Diets were formulated to be isocaloric, isonitrogenous, and isolipidic. Experimental period lasted 108 days, whereas dry matter intake (DMI) was evaluated daily and blood samples and carcass measurements were obtained on days 0, 55, and 108 of the study. Upon slaughter on day 109, steaks were collected for determination of the chemical and fatty acid (FA) profile of the meat. No treatment effects (P ≥ 0.35) were observed on DMI, performance, average daily gain (ADG), carcass ultrasound measurements, and chemical variables of the steak. Nonetheless, including WC into the diets increased C12:0, C16:0, C16:1 trans-9, C17:0, C18:0, C18:1 cis-9, C18:2 cis-9,cis-12, C18:3 cis-9,cis-12,cis-15, saturated, and unsaturated FA intake (P < 0.01). Moreover, adding WC increased DMI fluctuation and feed efficiency (P = 0.03), but decreased marbling (P ≤ 0.03). A treatment × day interaction was observed (P < 0.01) for serum leptin concentration, as 10WC animals had greater leptin concentration on d 103 vs. other treatments (P < 0.01). Regarding steak FA profile, WC addition into the diet increased C18:2 cis-7,trans-9 and C18:3 cis-9,cis-12,cis-15 (P < 0.001), whereas saturated FA was quadratically affected (P = 0.02) and unsaturated FA was reduced for 15WC (P < 0.04). In summary, increasing levels of CSFA into isolipidic finishing diets containing WC did not negatively impact feedlot performance, but reduced feed efficiency and increased marbling scores of Bos indicus bulls, demonstrating its feasibility as a technology to improve carcass traits of low-marbling animals.

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PSXIV-34 Encapsulated nitrate on performance of growing Nellore bulls under grazing system during the dry season

Journal of Animal Science ◽

10.1093/jas/skz258.855 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 431-432

Author(s):

Cibelle B Figueiredo ◽

Mauricia B Silva ◽

Juliano Fernandes ◽

Alana M Calaça ◽

Higor Rocha ◽

...

Keyword(s):

Body Weight ◽

Ammonium Nitrate ◽

Feed Efficiency ◽

Dry Matter ◽

Average Daily Gain ◽

Dry Season ◽

Dry Matter Intake ◽

Calcium Ammonium Nitrate ◽

Randomized Design ◽

Daily Gain

Abstract The aim of this trial was to evaluate the effect of encapsulated calcium ammonium nitrate as a partial substitute for soybean meals in the concentrate dry matter intake, average daily gain and feed efficiency of Nellore young bulls under grazing conditions, during the dry season. Sixty-four weaned Nellore (initial BW = 177.46±3.77 kg and 9 mo old) were used in a completely randomized assay. The study lasted 84 days on the dry season. Animals were allotted into 16 paddocks of 1.0 ha each of Urochloa brizantha, randomly assigned into one of two treatments: (CTL) supplement with 25% CP, without nitrate inclusion and; (ENP): supplement with 25% CP, with a inclusion of 50 g of encapsulated calcium ammonium nitrate to each 100 kg of body weight. Animals were fed with concentrate at 1.0% of body weight. Concentrate offered was monitored daily as well as his refusals were collected and weighed to determine daily concentrate dry matter intake (DMI) and feed efficiency (F:G). Animals were weighed every 28 d for calculating average daily gain (ADG). Data were analyzed as a completely randomized design, using ANOVA (α = 0.05). No effects of treatments (P > 0.3487) were observed for final BW (246.69 kg). The same for concentrate dry matter intake (P > 0.0550). Animals consumed 2.34 kg of supplement per day. The average daily gain (0.832 kg, P > 0.2649) and feed efficiency (0.356 kg, P > 0.7315) were not affected by the inclusion of nitrate. The inclusion of encapsulated calcium ammonium nitrate in supplement to Nellore young bulls under grazing conditions during the growing phase did not affect the performance.

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389 Effects of energy source on performance and carcass characteristics in hair lambs finished in feedlot

Journal of Animal Science ◽

10.1093/jas/skz258.319 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 155-156

Author(s):

Roman Castañeda-Serrano ◽

Fabian Gutierrez-Oviedo ◽

Marcela Diaz-Cristancho ◽

Jairo Pardo-Guzman ◽

Paula Lozano-Morales ◽

...

Keyword(s):

Energy Source ◽

Body Weight ◽

Feed Efficiency ◽

Dry Matter ◽

Palm Kernel ◽

Carcass Characteristics ◽

Dry Matter Intake ◽

Feeding Trial ◽

The Mean ◽

Dietary Treatments

Abstract The objective of this study was to evaluate the effects of different energy sources on performance, and carcass characteristics in hair lambs finished in feedlots. Twenty-eight hair lambs with an initial body weight (BW) 20.8 ± 3.01, were randomly assigned to one of four dietary treatments included with seven lambs per treatment. The dietary treatments included an energy source included at 18% Dry matter: S. spectabilis flour (SF), palm kernel (PK), corn bran (CB) and rice bran (RB) in a diet based in corn silage, ground corn, soybean meal formulated to 13.0% PC and 2.6 Mcal/Kg of DM. The feeding trial was performed for 13 weeks. Water was allowed ad libitum. Animals were slaughtered after the feeding trial, and the carcasses were kept at 4°C for 24 h under Colombian standard guidelines. Data were analyzed by using the ANOVA procedure, SAS version 9.1 to perform a randomized complete experiment with four diets. For each studied variable, the mean and standard error of the mean (SEM) were calculated and differences between means were evaluated Using Tukey′s Test (P ≤ 0.05). Final body weight, hot carcass weight, cold carcass weight, hot dressing carcass (%), and cold dressing weight (%) were not different between the four treatments (P > 0.05). Dry matter intake was superior to the S. spectabilis flour (P < 0,001). Feed efficiency was higher in the CB and RB treatments (P < 0,05). These results indicate that the inclusion of S. spectabilis and palm kernel could improve the dry matter intake and corn bran and rice bran the feed efficiency without effects on carcass characteristics

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PSXIV-17 Effects of corn bran plus solubles and corn oil on growth performance and carcass traits of finishing bulls

Journal of Animal Science ◽

10.1093/jas/skz258.864 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 436-437

Author(s):

Arquimedes Lima Junior ◽

Murillo A Meschiatti ◽

Vinicius N Gouvêa ◽

Victor Dantas ◽

Daniel Silva Antonelo ◽

...

Keyword(s):

Body Weight ◽

Growth Performance ◽

Feed Efficiency ◽

Dry Matter ◽

Corn Oil ◽

Average Daily Gain ◽

Carcass Traits ◽

Dry Matter Intake ◽

Final Body Weight ◽

Finishing Diets

Abstract The objective of this study was to evaluate the growth performance and carcass traits of finishing bulls fed diets containing, on dietary dry matter basis, different levels of corn wet distillers bran plus solubles (WDBS; 0, 15, 30 or 45%) added with or without corn oil (CO; 0 and 3%). A total of 205 Nellore bulls (390 ± 25 kg initial BW) were blocked by initial body weight, distributed in 40 pens and pens within weight block were randomly assigned to treatments in a 2 × 4 factorial arrangement. Diets were isonitrogenous and contained 8.5% sugarcane bagasse and 91.5% concentrate (ground corn, soybean meal, pelleted citrus pulp, urea, mineral). The WDBS (FlexyDDG®) and the corn oil were from SJC Bioenergia (Quirinópolis, Goiás, Brazil). Data were analyzed using the PROC MIXED procedure of SAS. An interaction between CO × WDBS levels was observed for dry matter intake (DMI; P = 0.032). In diets without CO, increasing levels of WDBS linearly (P = 0.004) reduced the DMI, but in diets containing 3% CO, increasing levels of WDBS quadraticaly affected the DMI (P = 0.002). No effects of CO, WDBSF levels or CO × WDBS levels were observed for final body weight, average daily gain, hot carcass weight and dressing percentage. Feed efficiency tended (P = 0.07) to be greater for bulls fed diets containing CO (0.154 vs. 0.144). Increasing levels of WDBS tended (P = 0.09) to increase the feed efficiency. In summary, increasing levels of WDBS in finishing diets linearly (in diets without CO) or quadratically (in diets with CO) reduces the dry matter intake. Adding CO and WDBS tend to increase feed efficiency.

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Effect of Forage:Concentrate Ratios in the diet and Intake Restriction on the Rumen Fermentation and Hormone Profiles of Finishing Beef Steers.

Proceedings of the British Society of Animal Production (1972) ◽

10.1017/s0308229600026167 ◽

1994 ◽

Vol 1994 ◽

pp. 69-69

Author(s):

C.L. Thorp ◽

R.W.J. Steen ◽

A.R.G. Wylie ◽

J.D. McEvoy ◽

C. Shaw

Keyword(s):

Growth Factor ◽

Beef Cattle ◽

Energy Intake ◽

Dry Matter ◽

Rumen Fermentation ◽

Fat Content ◽

Carcass Composition ◽

Dry Matter Intake ◽

Beef Steers ◽

Reducing Energy

Studies have shown that reducing energy intake by restricting dry matter intake (DMI) at a constant forage: concentrate (F:C) ratio is more effective at increasing carcass lean and reducing carcass fat content than is reducing energy intake by increasing the F:C ratio (1). Research at this Institute has also shown that, per megajoule of digestible energy (DE), diets restricted in this manner are 45 % more efficient at producing carcass lean.The mechanism by which these methods of restriction result in these differences in carcass composition has previously been assumed to be that of rumen fermentation. More recently however, the significance of rumen fermentation in controlling the carcass composition of beef cattle has been questioned (2,3).The aim of this experiment was to examine the effect of decreasing the F:C ratio, at constant DE and DMI, on both rumen and endocrinological parameters, in particular the hormones insulin and insulin like growth factor-1 (IGF-1), in finishing beef steers.

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Evaluation of the National Research Council (NRC) nutrient requirements for beef cattle: Predicting feedlot performance

Canadian Journal of Animal Science ◽

10.4141/a03-009 ◽

2003 ◽

Vol 83 (4) ◽

pp. 787-792

Author(s):

E. K. Okine ◽

D. H. McCartney ◽

J. B. Basarab

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Research Council ◽

Average Daily Gain ◽

National Research Council ◽

Metabolizable Energy ◽

Dry Matter Intake ◽

Net Energy ◽

Feeder Cattle

The accuracy of predicted CowBytes® versus actual dry matter intake (DMI) and average daily gain (ADG) of 407 Hereford × Angus and Charolais × Maine Anjou (445.6 ± 36 kg) feeder cattle using digestable enery acid detergent fiber (DE) estimated from the (ADF) content [Laboratory analysis method (LAB)] and from values determined in vivo (INVIVO method) was examined. The diet consisted of a 73.3% concentrate diet, 22.0% barley silage, 1.6% molasses, and 3.1% feedlot supplement fed ad libitum (as-fed basis). The calculated DE values of the feed were used to predict the metabolizable energy (ME), net energy of maintenance (NEm), and net energy of gain (NEg) of the diet. These energy values were then used in CowBytes® to predict dry matter intake (DMI), ADG, and days on feed (DOF) necessary to meet targeted quality grade of AA and weights of 522 and 568 kg for the heifers and steers, respectively. There was no effect of gender and prediction method interaction (P > 0.10) on any of the variables measured. There were no (P > 0.05) differences in predicted DMI by either the INVIVO or LAB method but both methods underestimated DMI actually consumed by the cattle by 6.8 and 4.9% (P = 0.007), respectively. Indeed, regression values from these predictive methods and actual DMI were (P < 0.05) different from the one-to-one relationship expected by definition. In spite of the higher actual DMI, the actual ADG of the cattle was 14 and 11% (P = 0.0004) lower than was predicted by either the INVIVO or LAB methods. A possible reason for the lower ADG could be an overestimation of DE of the diet. Thus, if available, users of CowBytes® should use actual DMI from their experience in ration formulation. In addition, the effects of environmental temperature on digestibility of diets should be taken into consideration when using the DE of the diet as determined from in vivo digestibility trials or calculated from chemical analyses in determining the DMI of feedlot cattle. Key words: Beef cattle, performance, CowBytes®, National Research Council

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Dry matter intake and feed efficiency profiles of 3 genotypes of Holstein-Friesian within pasture-based systems of milk production

Journal of Dairy Science ◽

10.3168/jds.2009-2686 ◽

2010 ◽

Vol 93 (9) ◽

pp. 4318-4331 ◽

Cited By ~ 45

Author(s):

J. Coleman ◽

D.P. Berry ◽

K.M. Pierce ◽

A. Brennan ◽

B. Horan

Keyword(s):

Milk Production ◽

Feed Efficiency ◽

Dry Matter ◽

Dry Matter Intake ◽

Holstein Friesian

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The use of coarsely milled barley straw in finishing diets for young beef cattle

The Journal of Agricultural Science ◽

10.1017/s0021859600019985 ◽

1969 ◽

Vol 73 (3) ◽

pp. 365-372 ◽

Cited By ~ 9

Author(s):

T. J. Forbes ◽

A. M. Raven ◽

J. H. D. Irwin

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Live Weight ◽

Dry Matter Intake ◽

Barley Straw ◽

Finishing Diets ◽

Rate Of Increase ◽

Significant Difference ◽

Digestible Organic Matter ◽

Linear Decline

SummaryAn experiment was carried out in which young beef cattle were given diets containing different levels of coarsely milled (1 in screen) barley straw. The proportions of straw used were 0, 10, 20, 30, 40 and 50 % and the performance of animals on these diets was compared with that of similar animals on an all concentrate diet. Each diet was given ad libitum to six animals. There was a significant linear decline in live-weight gain with increasing straw intake, the rate of decline being 0·62 ± 0·133 kg per week for each 10 % increase in the level of straw in the diet. The dry matter conversion ratio increased linearly with increasing straw intake, the rate of increase being 0·65 ± 0·186 units for each 10 % increase in straw in the diet. Dry matter intake was significantly (P < 0·001) affected by the proportion of straw in the diet. Although dry matter intake increased to a maximum at a level of 18·8% straw in the diet there was no significant increase in the intake of digestible organic matter (DOMI). There was a significant (P < 0·001) linear decline of 0·19 ± 0·04 kg DOMI with each 10% increase in straw in the diet. There was a significant linear decline in chilled carcase weight to the extent of 5·7 ± 0·096 kg for each 10% increase in straw. The killing-out percentage based on unfasted live weight declined significantly as the percentage of straw in the diet rose from 20 to 30%. However, when the killing-out percentage was calculated on the basis of live weight at slaughter less rumen contents there was no significant difference between treatments.

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