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

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.

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

Journal of Animal Science ◽

10.2527/jas.2014-7557 ◽

2014 ◽

Vol 92 (6) ◽

pp. 2660-2667 ◽

Cited By ~ 6

Author(s):

U. Y. Anele ◽

E. M. Domby ◽

M. L. Galyean

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Dry Matter Intake ◽

Finishing Beef Cattle

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The Effect of Live Yeast Supplementation on Beef Cattle Performance: A Systematic Review and Meta-Analysis

Journal of Agricultural Science ◽

10.5539/jas.v9n4p21 ◽

2017 ◽

Vol 9 (4) ◽

pp. 21 ◽

Cited By ~ 4

Author(s):

Everton Dezordi Sartori ◽

Maria Eugênia Andrighetto Canozzi ◽

Daniele Zago ◽

Ênio Rosa Prates ◽

João Pedro Velho ◽

...

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Randomized Trials ◽

Meta Analysis ◽

Average Daily Gain ◽

Dry Matter Intake ◽

Inclusion Criteria ◽

Feed Conversion ◽

The Mean ◽

Daily Gain

This meta-analysis evaluates the effects of yeast supplementation (Saccharomyces cerevisiae) on dry matter intake (DMI) and average daily gain (ADG) in beef cattle. The inclusion criteria were complete and randomized trials and supplementation with yeast S. cerevisiae versus no supplementation to measure DMI or ADG. Data were extracted from relevant papers via pre-defined protocols. A meta-analysis of random effects was conducted for each indicator separately including the mean of the control and treated groups. The results were presented with the pooled mean difference (MD), 95% of confidence interval, and I² (percentage of total variation between studies that is due to heterogeneity rather than chance). A total of 12 publications reporting 22 trials conducted in 1,161 cattle were analysed. The heterogeneity between studies was high and ranged from 92 to 99%. No effects were observed in ADG with the inclusion of yeast in the diet (MD = -2.849 g/day, p = 0.492). However, there was a reduction in the DMI (MD = -0.885 kg/day; p = 0.023) despite the high heterogeneity among studies (I2 = 92.4%; p < 0.001). The ADG increased when the forage level in the diet was between 30 and 50% (MD = 641.08 g/day; p = 0.001) and decreased when the level range from 51 to 75% (MD = -2.90 g/day; p < 0.001). In over 60% of the Neutral Detergent Fibre, the use of yeast in the diet decreased the ADG by 406.94 g/day (p = 0.034). Feedlot animals showed a reduction in the DMI (MD = -0.97 kg/day; p = 0.019) if supplemented with yeast. Supplementation with S. cerevisiae in the diet of beef cattle had no effect on ADG; however, it does improve the feed conversion due to the reduction in DMI.

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Evaluation of Dry Matter Intake and Average Daily Gain of Beef Cattle in Samarinda City

Journal of Southwest Jiaotong University ◽

10.35741/issn.0258-2724.56.1.15 ◽

2021 ◽

Vol 56 (1) ◽

Author(s):

Hamdi Mayulu ◽

Endra Ari Topan ◽

Muh. Ichsan Haris ◽

Taufan Purwokusumaning Daru

Keyword(s):

Beef Cattle ◽

Rice Straw ◽

Dry Matter ◽

Linear Regression Analysis ◽

Average Daily Gain ◽

Dry Matter Intake ◽

Feed Resources ◽

Intake Level ◽

Rice Area ◽

Daily Gain

The objective of this research was to determine the potential uses of dry matter in the average daily gain of beef cattle and rice straw carrying capacity as a feed alternative. The research used an analytical survey approach, and the location was chosen via purposive sampling. Data collection consisted of conducting interviews and observations based on a questionnaire; then, the collected data were tabulated and analyzed using descriptive statistics. Spearman’s correlation coefficient was used to determine the relationship between dry matter intake level and average daily gain; simple linear regression analysis was used to measure the effect of dry matter intake level on average daily gain. The results revealed that the average daily gain of beef cattle in North Samarinda, Palaran, Sambutan, and Samarinda Ulu (Indonesia) was 0.44 kg, 0.45 kg, 0.45 kg, and 0.45 kg, respectively. The analysis results of dry matter intake level on average daily gain obtained via the regression equation (Y) were as follows: Ỷ = 0.013 + 0.945X. This indicates that every intake of 0.945 kg of dry matter would yield an average daily gain increase of 0.013 kg. Effective utilization of available abundant feed resources (rice straw) is the key to economic maintenance of cattle; however, it tends to have low nutrition and low digestibility, so it is not given as a single feed because it cannot meet beef cattle’s dietary needs. This research found that rice straw production (each hectare of rice area) was able to supply alternative feed for beef cattle of 2.7 animal units per year.

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Prediction of Pasture Intake by Beef Cattle in Tropical Conditions

10.21203/rs.3.rs-657735/v1 ◽

2021 ◽

Author(s):

Geferson Antonio Fernandes ◽

André Soares de Oliveira ◽

Cláudio Vieira de Araújo ◽

Victor Rezende Moreira Couto ◽

Kamila Andreatta Kling de Moraes ◽

...

Keyword(s):

Beef Cattle ◽

Crude Protein ◽

Dry Matter ◽

Prediction Models ◽

Average Daily Gain ◽

Random Effect ◽

The Body ◽

Dry Matter Intake ◽

Accuracy And Precision ◽

Tropical Conditions

Abstract A meta-analytic study was conducted to develop and evaluate models for the prediction of pasture dry matter intake (DMIpasture) by beef cattle in tropical conditions. 804 individual observations of DMIpasture were used, taken from 23 studies through analysis of mixed models, including the study as a random effect. To evaluate the accuracy and precision of the new models proposed as well as for the models of Azevedo et al., (2016) and Minson and McDonald (1987), an independent databank with 87 means from treatments of 21 experiments (n = 888 animals) was used. Three prediction models were adjusted: Model I (Animal Information), Model II (Animal Information + Supplement) and Model III (Animal Information + Supplement + Pasture). The proposed models presented similarity for the average square root of the prediction error. The inclusion of the predictive variables for supplementation (supplement dry matter intake - DMIsupplement - % of the body weight and crude protein intake through supplement) with the variables for the animal (BW0,75 and average daily gain) and of the pasture (% of crude protein) in Model III improves accuracy and precision and provides higher determination and correlation coefficients, and agreement than the other proposed models. Similarly, it was found to be more accurate and precise than the equations of Azevedo et al., (2016) and Minson and McDonald (1987), which presented lower precision and accuracy than the proposed models. The DMIpasture for beef cattle in tropical conditions is more accurate and precise when the information for the animal, supplement and pasture is included.

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COMPARISON OF SILAGES FROM DENSELY SEEDED AND CONVENTIONALLY SEEDED CORN FOR BEEF STEERS

Canadian Journal of Animal Science ◽

10.4141/cjas86-045 ◽

1986 ◽

Vol 66 (2) ◽

pp. 431-439 ◽

Cited By ~ 3

Author(s):

J. W. G. NICHOLSON ◽

G. BELANGER ◽

P. L. BURGESS

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Average Daily Gain ◽

Productivity Loss ◽

Dry Matter Intake ◽

Beef Steers ◽

Vitamin Supplement ◽

Seeding Rate ◽

And Performance ◽

Daily Gain

Corn for silage was planted at two seeding rates (60 000 and 200 000 kernels ha−1) in three consecutive years and evaluated by determining yields, digestibility by sheep and performance of growing-fattening beef cattle fed the ensiled crops. Plant populations at harvest ranged over years from 53 000 to 63 000 plants ha−1 for conventional seeding and from 94 000 to 151 000 plants ha−1 for the dense seeding rate. Dense seeding increased whole-plant dry matter yield each year. Only in 1 year (1979) did dense seeding reduce the yield of dry matter in the whole ear or grain (P < 0.01). In the same crop year (1979) dense seeding reduced the dry matter and crude protein contents of the silage (P < 0.01) and the digestibilities by sheep of the dry matter and nitrogen were lower (P < 0.01) than for the conventionally seeded crop. In 2 years (1978 and 1979), when the silages were fed ad libitum with only a protein-mineral-vitamin supplement, the daily silage dry matter intake by beef cattle was lower (P < 0.01 or P < 0.05) and in 1979 the average daily gain (1.06 vs. 1.14 kg d−1) was lower (P < 0.01) with silage from the dense seeding. There were no significant differences in beef performance parameters (silage dry matter intake, daily gain, and efficiency of silage conversion to daily gain) in the third year when the silages were fed with ground barley. Dense seeding of corn for silage resulted in more beef production per hectare and provides a means of reducing productivity loss due to birds feeding on the ripening ears of corn. Key words: Corn, silage, beef, dense seeding, seeding rate

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Use of feed enzymes in feedlot finishing diets

Canadian Journal of Animal Science ◽

10.4141/a98-124 ◽

1999 ◽

Vol 79 (2) ◽

pp. 243-246 ◽

Cited By ~ 28

Author(s):

K. A. Beauchemin ◽

L. M. Rode ◽

D. Karren

Keyword(s):

Beef Cattle ◽

Dry Matter ◽

Average Daily Gain ◽

Feedlot Cattle ◽

Dry Matter Intake ◽

Cattle Production ◽

Finishing Diets ◽

Feed Enzymes ◽

Daily Gain ◽

Matter Basis

An enzyme mixture with predominantly xylanase and cellulase activities was added to a high concentrate diet (92.2%, dry matter basis) and fed to growing heifers (370 kg) reared in a commercial feedlot. Enzyme supplementation had no effect on dry matter intake but increased (P < 0.01) average daily gain by 9% (1.40 to 1.53 kg d−1) and numerically improved feed-to-gain ratio by 10% (7.72 to 6.95 kg dry matter kg−1 gain). Feed enzyme technology can improve efficiency of commercial feedlot cattle production. Key words: Beef cattle, feedlot cattle, enzymes, barley

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