Predicting dry matter intake by growing and finishing beef cattle: Evaluation of current methods and equation development12

2014 ◽  
Vol 92 (6) ◽  
pp. 2660-2667 ◽  
Author(s):  
U. Y. Anele ◽  
E. M. Domby ◽  
M. L. Galyean
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Finishing Beef Cattle

PSXIII-24 Is it possible to finish beef cattle in feedlot and be environmentally friendly?

2021 ◽  
Vol 99 (Supplement_3) ◽  
pp. 436-436
Author(s):  
Andre Pastori D Aurea ◽  
Lauriston Bertelli Fernandes ◽  
Luis Eduardo Ferreira
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Essential Fatty Acids ◽  
Average Daily Gain ◽  
Environmentally Friendly ◽  
Dry Matter Intake ◽  
Omega 3 ◽  
Growth Promoters ◽  
Finishing Beef Cattle ◽  
Natural Additive

Abstract To improve production without affecting the environment, the objective of this research was to evaluate a natural additive to replace the conventional growth promoters in finishing beef cattle diets. 160 Nellore bulls were assigned into two treatments, where the only difference was the additive used: natural additive (Fator P - 600 mg/kg DM) and conventional growth promoters (25 mg/kg DM of monensin + 20 mg/kg DM of virginiamycin). The Fator P® is an organic additive certificated by IBD, which is a blend of the compounds; amino acids (lysine, methionine, and tyrosine), choline, minerals, probiotics and essential fatty acids (omega 3 and omega 6). The diet contained 14% CP and 76% TDN. Nellore young bulls (n = 160), weighing 433 ± 7 kg, with an average age of 24 months, were used. The feedlot facilities contained 16 collective pens, in which 10 animals were allocated. The animal performance was evaluated for 84 days, with 21 days of adaptation. Means were compared with 5% of significance. The conventional growth promoters reduced the dry matter intake. Natural 11.33 kg/day and 10.9 kg/day for the conventional. The conventional growth promoters reduced in 0.43 kg of dry matter intake (P = 0.042) or 0.1% of body weight (P = 0.001; 2.26% to 2.16%). No difference in average daily gain (P = 0.58). 1.655 kg/day for natural and 1.625 for the conventional. The feed efficiency ratio wasn’t different (P = 0.71), natural 146 g / kgMSˉ¹ and 148 g / kgMSˉ¹ for conventional. There were no difference in carcass yield (P = 0.89), mean 56.3%. The natural additives can improve the dry matter intake and can be used as an alternative to antibiotics in high concentrate diets for beef cattle in feedlot system. Thus, finishing beef cattle in the feedlot can be environmentally friendly.

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

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.

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

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

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

BMC Genomics ◽  
2014 ◽  
Vol 15 (1) ◽  
pp. 1004 ◽  
Author(s):  
Mahdi Saatchi ◽  
Jonathan E Beever ◽  
Jared E Decker ◽  
Dan B Faulkner ◽  
Harvey C Freetly ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Feed Efficiency ◽  
Dry Matter ◽  
Test Weight ◽  
Dry Matter Intake ◽  
Weight Growth

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

1969 ◽  
Vol 73 (3) ◽  
pp. 365-372 ◽  
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.

Effects of forage:Concentrate ratio in the diet and restricted dry matter intake on the performance and carcass composition of steers

1994 ◽  
Vol 1994 ◽  
pp. 68-68
Author(s):  
R.W.J. Steen
Keyword(s):  
Beef Cattle ◽  
Energy Intake ◽  
Dry Matter ◽  
Carcass Composition ◽  
Dry Matter Intake ◽  
Meat Production ◽  
Efficient Production ◽  
Cattle Feeding ◽  
Ad Libitum ◽  
Forage:Concentrate Ratio

The efficient production of lean beef suitable for current consumer demand necessitates effective rationing of beef cattle. Feeding standards for beef cattle given by ARC (1980) predict that a reduction in energy intake produces a large reduction in performance with little effect on the energy or fat contents of the gain. However previous studies have shown that diets containing a high proportion of grass silage may sustain lower levels of performance and result in a greater proportion of fat in the gain in both calves and finishing cattle, than when similar quantities of energy and protein are given in the form of high-concentrate diets. The effects of a change in energy intake on performance and carcass composition of beef cattle are therefore likely to depend on whether this change is achieved by restricting the quantity of food given or changing the forage: concentrate ratio of a diet given ad libitum.The present experiment was carried out to examine the effects of forage:concentrate ratio in the diet and ad libitum versus restricted dry matter intake on the performance, carcass composition and efficiency of lean meat production by steers.

The potential of a range of maize silages, included as a component of grass silage based diets, to increase the dry matter and energy intakes of finishing beef cattle

2002 ◽  
Vol 2002 ◽  
pp. 115-115
Author(s):  
R.M. Kirkland ◽  
R.W.J. Steen ◽  
F.J. Gordon ◽  
T.W.J. Keady
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Nutrient Supply ◽  
Maize Silage ◽  
Grass Silage ◽  
Metabolisable Energy ◽  
Finishing Beef Cattle ◽  
Forage Mixtures ◽  
Forage Diets

The inclusion of maize silage in grass silage based diets may offer the potential to improve productivity on farms due to associative effects resulting from mixed-forage diets on nutrient supply to the animal. The objective of the present study was to examine the effects on dry matter (DM) and metabolisable energy (ME) intakes of beef cattle of offering forage mixtures comprising grass and maize silages of differing qualities.

Prediction of dry matter intake by feedlot beef cattle under tropical conditions

2020 ◽  
Author(s):  
H. M. da Silva ◽  
A. B. Donadia ◽  
L.F. Moreno ◽  
A.S. de Oliveira ◽  
E. H. B. K. Moraes ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
Dry Matter Intake ◽  
Tropical Conditions

Beef production from silage 3. The effect of supplements of hay and dried grass on the performance of beef cattle

1983 ◽  
Vol 37 (2) ◽  
pp. 195-202 ◽  
Author(s):  
C. Thomas ◽  
R. M. Tetlow ◽  
B. G. Gibbs ◽  
Margaret Gill
Keyword(s):  
Weight Gain ◽  
High Temperature ◽  
Beef Cattle ◽  
Total Nitrogen ◽  
Crude Protein ◽  
Dry Matter ◽  
Live Weight ◽  
Dry Matter Intake ◽  
Live Weight Gain ◽  
Ad Libitum

ABSTRACT1. The primary growth of perennial ryegrass was cut between 7 and 9 June and ensiled with formic acid at 2·5 1/t. The regrowth was cut on 24 July; part was dried at high temperature (dried grass), the remainder was left to dry in the field (hay). The dried grass (DG) and part of the hay were ground and pelleted, the hay being pelleted alone (PH) or with the addition of formaldehyde at 20 g/kg crude protein (PHF). The remainder of the hay was offered in the chopped form (CH). The four supplements (CH, PH, PHF, DG) were offered at two levels, 6·5 (L) and 130 (H) g dry matter per kg live weight to 54 British Friesian steers (initial live weight, 110 kg) receiving the silage ad libitum.2. The silage had a high pH and a high proportion of the total nitrogen was in the form of ammonia, indicating poor fermentation. The solubility of nitrogen in the supplements was highest (262 g/kg total nitrogen) in CH, progressively less in PH and PHF and lowest (122 g/kg total nitrogen) in DG.3. Total dry-matter intake was highest with DG at the higher level of inclusion. Dry-matter intake was significantly higher for PH and PHF than for CH (P < 0·001). However, intake of digestible energy did not differ between hays. Live-weight gain was increased from a low level of 0·24 kg/day (silage alone) by all supplements, but this effect was greater with DG than with the hays (P < 0·001). Level of supplementation increased live-weight gain from 0·54 to 0·74 kg/day.4. Supplements of dried grass gave higher live-weight gains than did hay made from the same sward. However, the results indicate that supplementation of badly preserved silage with grass hay of good quality can produce acceptable levels of performance of up to 0·70 kg/day in 4-month-old steers. Processing of the hay had little effect on animal performance.

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