1346 Effect of narasin on rumen metabolism and dry matter intake in wethers fed high-forage diets

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 650-650 ◽  
Author(s):  
D. M. Polizel ◽  
M. F. Westphalen ◽  
A. A. Miszura ◽  
M. H. Santos ◽  
R. G. Silva ◽  
...  
Keyword(s):  
Dry Matter ◽  
Dry Matter Intake ◽  
Rumen Metabolism ◽  
High Forage ◽  
Forage Diets

EFFECT OF THE FEED ADDITIVES CHLORTETRACYCLINE, MONENSIN AND LASALOCID ON FEEDLOT PERFORMANCE OF FINISHING CATTLE, LIVER LESIONS AND TISSUE LEVELS OF CHLORTETRACYCLINE

1988 ◽  
Vol 68 (4) ◽  
pp. 1131-1141 ◽  
Author(s):  
S. E. BEACOM ◽  
G. O. KORSRUD ◽  
W. D. G. YATES ◽  
J. D. MacNEIL ◽  
Z. MIR
Keyword(s):  
Dry Matter ◽  
Average Daily Gain ◽  
Feed Additives ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Liver Lesions ◽  
Finishing Cattle ◽  
Acid Ratio ◽  
High Forage ◽  
Forage Diets

Charolais-sired, three way cross steers and heifers (n = 209) were fed ground high-forage diets for 56 d and then were finished on rolled grain based diets. Both diets were supplemented with chlortetracycline (CTC), monensin (MON) or lasalocid (LAS). Cattle fed the high-forage diets supplemented with MON or CTC gained faster (P < 0.05) than those fed an unsupplemented (CON) diet. Dry matter intake was also increased (P < 0.05) by CTC over animals fed the CON diet. Feed efficiency was not affected by CTC but was improved over CON by supplementation with MON or LAS. During the high-concentrate feeding period, inclusion of feed additives did not significantly improve average daily gain or dry matter intake when compared with CON. Of the carcass characteristics, only carcass weight was greater (P < 0.05) and only with CTC supplementation. Monensin and LAS inclusion significantly decreased the acetic to propionic acid ratio in rumen contents. There was no evidence that the incidence of liver lesions differed among the treatments. Analyses of liver, muscle and kidney samples from 61 animals fed CTC and 14 animals fed the CON diet produced no repeatably detectable traces of CTC. Averaged across sex and weight group, returns to labor per animal were $25.83, $61.46, $48.52 and $41.10 for the CON, CTC, MON and LAS treatments, respectively. Key words: Chlortetracycline, monensin, lasalocid, beef steers, heifers, tissue residue

Effects of fodder beet on rumen metabolism

1988 ◽  
Vol 47 (3) ◽  
pp. 429-434 ◽  
Author(s):  
M. S. Sabri ◽  
N. W. Offer ◽  
D. J. Roberts
Keyword(s):  
Sugar Beet ◽  
Propionic Acid ◽  
Dry Matter ◽  
Fodder Beet ◽  
Rumen Ph ◽  
Rumen Metabolism ◽  
Significant Difference ◽  
The Mean ◽  
High Forage ◽  
In Sacco

ABSTRACTTwo experiments were carried out with sheep, to characterize fodder beet in terms of its effects on rumen function. In experiment A, a study was made of the effects of supplementing hay with fodder beet (FB) on rumen pH and volatile fatty acid (VFA) concentration compared with two control supplements of either barley/maize (BM) or molassed sugar-beet shreds (SBP). Hay was offered with all three supplements in a 50: 50 ratio on a dry matter (DM) basis. The mean rumen pH for the fodder beet diet was 6·34 and intermediate between two controls (BM 6·20 and SBP 6·38). There was no significant difference in rumen concentration of total VFA for the three different diets (FB, SBP and BM) but there were highly significant effects due to diet for acetic and propionic acid molar proportions (P< 0·001). Molar proportion of propionic acid for diets FB, BM and SBP were 0·2064, 0·2221 and 01880 respectively. The loss of DM from nylon bags incubated in the rumen of sheep given the test diets was 471, 447 and 486 g/kg for FB, BM and SBP respectively. In experiment B, the rate ofin saccoorganic matter (OM) disappearance of the three supplements were compared in sheep given a constant high forage diet (900 g/day hay DM + 200 g/day compound food DM). There were highly significant differences in rates of OM disappearances for the supplements (P< 0·001). The losses of OM measured after 3 h incubation in the rumen were 767, 608, 378 and 236 g/kg for fodder beet, barley/maize, molassed sugar-beet shreds and hay respectively.

Nutrient and dry matter intakes of broodmares fed high forage diets

2011 ◽  
Vol 31 (5-6) ◽  
pp. 264-265 ◽  
Author(s):  
S. McCown ◽  
M. Brummer ◽  
S. Hayes ◽  
J. Earing ◽  
L. Lawrence
Keyword(s):  
Dry Matter ◽  
High Forage ◽  
Forage Diets

ENERGY SUPPLEMENTATION OF HIGH FORAGE DIETS FOR MID-LACTATION DAIRY COWS

1990 ◽  
Vol 70 (3) ◽  
pp. 867-874 ◽  
Author(s):  
P. H. ROBINSON ◽  
P. L. BURGESS
Keyword(s):  
Fatty Acids ◽  
Dairy Cows ◽  
Feed Intake ◽  
Dry Matter ◽  
Short Chain Fatty Acids ◽  
Animal Performance ◽  
Milk Fatty Acids ◽  
Alfalfa Silage ◽  
High Forage ◽  
Forage Diets

Alfalfa silage-based rations containing corn grain, oats or tallow as the primary supplemental energy source were fed to a total of 48 mid-lactation cows in two 56-d experiments. Corn, oats or tallow were mixed with the alfalfa silage and fed ad libitum. A corn-barley-soybean meal-based concentrate was fed twice daily proportional to milk production. Overall rations varied from 55 to 70% alfalfa silage on a dry matter basis. Feed intake was lower for tallow-supplemented cows, whereas milk yield and milk proportions of fat and lactose were similar for cows in all groups. Tallow-supplemented cows produced milk with a lower protein proportion and protein yield was also lower. Tallow-supplemented cows produced milk with major shifts in milk fatty acids from most short-chain fatty acids (<C16:1) to primarily C18:1 as well as C18:0 and C20:0. Parameters of rumen fermentation were similar among all groups and did not suggest a ruminal mechanism for reduced feed intake in spite of the high level of added fat (8.6 and 6.2% of dietary dry matter in exp. 1 and exp. 2, respectively). Isoenergetic substitution of oats for corn had no negative effects on animal performance in these high-forage diets. However, addition of tallow to alfalfa silage at these levels depressed overall animal performance. Key words: Tallow, oats, corn, milk fatty acids, dairy cows

EFFECT OF FEEDING FREQUENCY ON THE UTILIZATION OF HIGH-FORAGE DIETS BY CATTLE

1987 ◽  
Vol 67 (4) ◽  
pp. 1067-1074 ◽  
Author(s):  
A. RUIZ ◽  
D. N. MOWAT
Keyword(s):  
Feed Intake ◽  
Dry Matter ◽  
Nitrogen Retention ◽  
Eating Patterns ◽  
Feeding Frequency ◽  
Beneficial Effects ◽  
Ad Libitum ◽  
High Forage ◽  
Effect Of Feeding ◽  
Forage Diets

A feedlot trial and a digestion and nitrogen balance trial were carried out to evaluate the effect of feeding one (1 ×) or four times (4 ×) daily on the utilization of two high-forage diets. On a dry matter basis, diet 1 contained 76% alfalfa haylage and 22% high-moisture corn; diet 2 contained 93% corn silage and 4% soybean meal; the balance was composed of mineral and Rumensin premixes. In the feedlot trial, feed was offered ad libitum, and feeding frequency resulted in small differences in eating patterns within diets. Thus, rate of gain, feed intake and conversion were not significantly affected. In the digestion trial, feed intake was restricted to 90% of each individual's maximum intake, which resulted in larger differences in eating patterns between 1 × and 4 × feeding. Under these conditions, feeding frequently increased (P < 0.05) dry matter and organic matter digestibility, as well as N retention (percent of N intake). Increased feeding frequency had no beneficial effects under ad libitum feeding of high-forage diets. However, under restricted feeding, feeding more frequently improved total diet digestibility and nitrogen retention. Key words: Cattle, feeding frequency, digestibility, growth, nitrogen retention

scholarly journals Short-Term Eating Preference of Beef Cattle Fed High Forage or High Grain Diets Supplemented with 3-Nitrooxypropanol

Animals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 64 ◽  
Author(s):  
Chanhee Lee ◽  
Seon-Ho Kim ◽  
Karen Beauchemin ◽  
Pietro Celi ◽  
Stéphane Duval
Keyword(s):  
Beef Cattle ◽  
Dry Matter ◽  
The Other ◽  
Dry Matter Intake ◽  
Feed Consumption ◽  
Beef Steers ◽  
Short Term ◽  
Enteric Methane ◽  
Consumption Rates ◽  
High Forage

Two experiments were conducted to examine eating preference of beef cattle for diets with or without the investigative enteric methane inhibitor 3-nitrooxypropanol (3-NOP). Nine beef steers were housed in individual stalls, each equipped with two feed bunks. The first experiment (Exp. 1) was conducted with a high forage diet and each animal received a diet without 3-NOP (CON) in one bunk and a diet with 3-NOP (dNOP) in the other bunk. The second study (Exp. 2) was conducted with the same animals about 6 months after Exp. 1 where a high grain diet without (CON) or with 3-NOP (dNOP) was offered. In Exp. 1, animals initially preferred CON compared with dNOP. Feed consumption from 0 to 3, 3 to 6, and 6 to 12 h after feeding was lower for dNOP compared with CON. However, dry matter intake (DMI) and feed consumption of dNOP gradually increased during Exp. 1 such that there was no preference between CON and dNOP on day 7. In Exp. 2, there was no preference for or against dNOP. Average DMI was greater for dNOP vs. CON, but interactions between diet and day for DMI and feed consumption rates indicated that daily preference between CON and dNOP was variable. In conclusion, beef steers initially detected a difference between CON and dNOP and selected in favor of CON rather than dNOP when they had not previously been exposed to 3-NOP. However, the animals rapidly acclimatized to a diet with 3-NOP (Exp. 1) and showed no eating preference between CON and dNOP within 7 days. This lack of preference was maintained throughout Exp. 2 when the same animals were fed a high grain diet.

The Effect of protein supply and level of supplementary concentrate on rumen metabolism of lactating dairy cows

1990 ◽  
Vol 1990 ◽  
pp. 16-16
Author(s):  
Rosemary E Poots ◽  
E F Unsworth
Keyword(s):  
Dairy Cows ◽  
Dry Matter ◽  
Agricultural Research ◽  
Dry Matter Intake ◽  
Agricultural Research Institute ◽  
Low Protein ◽  
Rumen Metabolism ◽  
Lactating Dairy Cows ◽  
Low Levels ◽  
Protein Supply

Previous research at the Agricultural Research Institute of Northern Ireland has shown that equivalent milk yields can be obtained by feeding high levels of low-protein supplementary concentrate or low levels of high-protein supplementary concentrate. The latter may be due to an increase in dry matter intake and thus energy available for milk yield (an indirect effect) or an increase in amino acid supply from increased protein in the diet (a direct effect) or a combination of these. The experiment compared the effect of varying levels of protein supplement on rumen fermentation characteristics in lactating dairy cows.

scholarly journals Effects of narasin supplementation on dry matter intake and rumen fermentation characteristics of Bos indicus steers fed a high-forage diet

2019 ◽  
Vol 4 (1) ◽  
pp. 118-128 ◽  
Author(s):  
Daniel M Polizel ◽  
Bruno I Cappellozza ◽  
Fernanda Hoe ◽  
Catarina N Lopes ◽  
José Paulo Barroso ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Bos Indicus ◽  
Experimental Period ◽  
Rumen Fermentation ◽  
Nutrient Digestibility ◽  
Neutral Detergent Fiber ◽  
Dry Matter Intake ◽  
Plasma Urea ◽  
High Forage

Abstract This study evaluated the effects of narasin on intake and rumen fermentation characteristics of Bos indicus steers offered a high-forage diet for 140 d. On day 0 of the study, 30 rumen-fistulated Nellore steers [initial body weight (BW) = 281 ± 21 kg] were assigned to 30 individual pens in a randomized complete block design according to their initial BW. Animals were randomly assigned to 1 of the 3 treatments: 1) forage-based diet without narasin (CONT; n = 10), 2) CONT diet plus 13 ppm of narasin (13NAR; n = 10), and 3) CONT diet plus 20 ppm of narasin (20NAR; n = 10). The forage used was Tifton-85 (Cynodon dactylon spp.), whereas the carrier for narasin was a 50:50 mixture of soybean hull:corn. The experimental period was divided into 5 periods of 28 d each. Throughout the experimental period, total dry matter intake (DMI) was recorded daily, whereas mineral salt intake was recorded weekly. Blood and ruminal fluid samples were collected on day 0 (prior to treatment feeding), 28, 56, 84, 112, and 140 of the study. Moreover, total tract apparent nutrient digestibility was performed for a 5-d period every 28 d. No treatment effects were observed on forage, mineral, concentrate, or total DMI (P ≥ 0.22). Nonetheless, 13NAR tended to have a greater mineral intake vs. 20NAR cohorts (P = 0.08) Narasin-supplemented animals had reduced rumen acetate, Ac:Pr ratio, as well as greater (P ≤ 0.02) rumen propionate concentrations vs. CONT cohorts. Moreover, 13NAR increased rumen propionate and decreased butyrate, Ac:Pr vs. 20NAR cohorts (P ≤ 0.01). Throughout the experimental period, narasin-supplemented animals had reduced ammonia concentrations vs. CONT cohorts (P &lt; 0.01), whereas no differences were observed between 13NAR and 20NAR (P = 0.80). No treatment or dose effects were observed (P ≥ 0.23) on DM, organic matter (OM), protein, neutral detergent fiber (NDF), acid detergent fiber (ADF), and mineral digestibility. Animals fed 13NAR had a reduced mean plasma urea concentration vs. CONT cohorts (P = 0.03), whereas no further differences were observed (P ≥ 0.12). In summary, narasin supplementation to beef steers offered a high-forage diet did not impact forage, mineral, and total DMI, as well as nutrient digestibility, whereas rumen fermentation characteristics, rumen ammonia, and plasma urea concentrations were positively impacted and lasted throughout the experimental period. Additionally, 13 ppm of narasin resulted in a reduced Ac:Pr ratio and rumen ammonia when compared to animals supplemented with 20 ppm.

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