Effect of Monensin on Ruminal Fermentation, Forage Intake and Weight Gains of Wheat Pasture Stocker Cattle

1981 ◽  
Vol 52 (3) ◽  
pp. 447-454 ◽  
Author(s):  
G. W. Horn ◽  
T. L. Mader ◽  
S. L. Armbruster ◽  
R. R. Frahm
Keyword(s):  
Ruminal Fermentation ◽  
Stocker Cattle ◽  
Weight Gains ◽  
Wheat Pasture ◽  
Forage Intake

Influence of grain and monensin supplementation on ruminal fermentation, intake, digesta kinetics and incidence and severity of frothy bloat in steers grazing winter wheat pastures

1990 ◽  
Vol 68 (4) ◽  
pp. 1139-1150 ◽  
Author(s):  
M. E. Branine ◽  
M. L. Galyean
Keyword(s):  
Winter Wheat ◽  
Beef Steers ◽  
Ruminal Fermentation ◽  
Passage Rate ◽  
Ruminal Ph ◽  
Molar Proportion ◽  
Wheat Pasture ◽  
Forage Intake

Abstract Three 10-d collection periods (April 4 to 14, early April, EApr; April 23 to May 3, late April, LApr; May 10 to 20, 1984, mid-May, MMay) were conducted to evaluate effects of no supplement (C), .5 kg·head−1·d−1 (as-fed basis) supplemental grain (steam-flaked milo, G) or G plus 170 mg monensin·headhead−1·d−1 (M) on forage intake and digestion by 12 ruminally cannulated beef steers (four/treatment; avg initially BW = 393 kg) grazing irrigated winter wheat pasture. Ruminal pH was greater (P < .01) for M than for C or G during EApr but was not altered by treatments in LApr or MMay. Compared with C, ruminal NH3 was decreased (P < .10) by G and M (5 h after supplementation) in EApr, decreased (P < .05) by G (2h) and increased (P < .05) by M (8 h) in LApr and decreased (P < .10) by G (−1h) in MMay. Treatments had little influence on total VFA concentrations or on molar proportions of acetate and propionate. Butyrate molar proportion was decreased (P < .10) by M during EApr and LApr, but not during MMay. Monensin increased (P < .05) fluid passage rate compared with C and G in EApr but not in other periods. Particulate passage measurements did not differ (P > .10) among treatments within periods. Forage DM intake was not influenced (P > .10) by supplementation during any period. Extent of in situ forage DM disappearance was greater (P < .10) for M than for C or G during EApr (12 and 30 h of incubation) but was not different (P > .10) in LApr or MMay. Incidence of frothy bloat was decreased (P < .05) by M during EApr; this reduction may have been related to effects of M on ruminal pH, forage digestion and fluid passage.

scholarly journals 62 Effects of forage allowance and supplementation on performance of steers grazing wheat pasture

2020 ◽  
Vol 98 (Supplement_2) ◽  
pp. 29-29
Author(s):  
Kynzie McNeill ◽  
Ryan R Reuter ◽  
Paul A Beck
Keyword(s):  
Linear Regression ◽  
Cattle Grazing ◽  
Combined Effect ◽  
Experimental Unit ◽  
Minimal Effect ◽  
Soybean Hulls ◽  
Fecal Output ◽  
Stocker Cattle ◽  
Wheat Pasture ◽  
High Forage

Abstract A 72-d trial was conducted to estimate the combined effect of forage allowance and a fiber-based energy supplement in stocker cattle grazing wheat. Eight pastures (2.7 to 5.1 ha) each contained seven test steers (initial BW = 210 ± 36 kg). Weekly, additional steers were stocked in each pasture in a put and take method to achieve forage allowance of either 2.5 or 5.5 kg forage DM / kg steer BW (4 pastures each). Two pastures in each forage allowance were fed daily with a supplement containing 50% wheat midds and 50% soybean hulls at the rate of 1.5 kg per steer. Forage mass was measured twice weekly using a calibrated rising plate meter. Cattle were weighed weekly on calibrated scales. Data were analyzed using linear regression with pasture as the experimental unit. Mean ADG was 1.36 kg/d. One pasture in the high forage allowance, non-supplemented treatment was removed because we were unable to maintain the designed forage allowance. The interaction of forage allowance and supplement was not significant (P = 0.37) for ADG, and supplementation did not affect ADG (P = 0.20), however increased forage allowance tended to improve ADG (P = 0.06, 0.21 kg ADG per kg forage allowance). To further investigate forage DMI, a 14-d trial began on day 36. Three of the seven test steers in each pasture were randomly chosen and administered 7 ± 0.1 g of TiO2 daily at 0700 as an external marker to estimate fecal output. Forage DMI (at an assumed 72% DM digestibility) averaged 2.1% of midpoint BW, below our expectation. Additional forage allowance tended to improve estimated forage DMI (P= 0.06), but supplement had minimal effect (P = 0.30).

MONENSIN FED TO GROWING AND FINISHING CATTLE

1977 ◽  
Vol 57 (4) ◽  
pp. 769-773 ◽  
Author(s):  
D. N. MOWAT ◽  
J. W. WILTON ◽  
J. G. BUCHANAN-SMITH
Keyword(s):  
Acetic Acid ◽  
Feed Efficiency ◽  
Carcass Characteristics ◽  
Corn Silage ◽  
Ruminal Fermentation ◽  
High Moisture ◽  
Molar Percentage ◽  
Finishing Cattle ◽  
Weight Gains ◽  
Alfalfa Silage

Two experiments were conducted to evaluate the effects of monensin with growing and finishing cattle. In experiment 1, 80 Hereford steer calves were fed two different silage rations. With alfalfa silage, monensin increased weight gains (+12%) and feed efficiency (P < 0.05) (+11%). When high moisture (HM) shelled corn was fed along with alfalfa silage, monensin had no effect on weight gains, but increased feed efficiency (P < 0.05) (+12%) largely by decreasing (P > 0.05) feed intake. In experiment 2, 72 steer and heifer crossbred calves were fed corn silage for 112 days followed by high levels of HM shelled corn through to marketing at a constant finish. Over an average total of 258 days on feed, monensin increased (P < 0.05) rate of gain (+9%) as well as feed efficiency (+13%). Monensin produced no effects on carcass characteristics. At least part of the improvement in feed efficiency could be attributed to altered ruminal fermentation. Molar percentage of propionic acid was increased (P < 0.05) and butyric and acetic acid decreased (P < 0.05) with monensin feeding.

Influence of Lasalocid Level on Forage Intake, Digestibility, Ruminal Fermentation, Liquid Flow and Performance of Beef Cattle Grazing Winter Range1

1987 ◽  
Vol 65 (3) ◽  
pp. 777-785 ◽  
Author(s):  
K. A. Jacques ◽  
R. C. Cochran ◽  
L. R. Corah ◽  
T. B. Avery ◽  
K. O. Zoellner ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Liquid Flow ◽  
Cattle Grazing ◽  
Ruminal Fermentation ◽  
Fermentation Liquid ◽  
Forage Intake ◽  
And Performance
Sign in / Sign up

Export Citation Format

Share Document