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Lethbridge Herald Newspaper Archives

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Lethbridge Herald, The (Newspaper) - February 5, 1974, Lethbridge, Alberta TlMtday, February -THI LtTHMIDQE HEMALO-11 Coarse food prevents feedlot bloat By Dr. K. J. CHENG and Dr. R. HIRONAKA Lethbridge Research Station Bloat is a major cause of death in feedlot cattle, and losses are estimated to be about one to 1.5 per cent. Losses in some feedlots have been as high as 10 per cent but bloat can be reduced significantly by an improved method of feed processing. Recent studies at the Lethbridge Research Station have shown that cattle fed a fine particle- size feed are more susceptible to bloat than those fed a coarse feed of the same composition. Gas is produced by bacteria in the rumen and is normally expelled by belching. In bloat, the gas accumulates because it becomes trapped in the viscous rumen fluid in the form of a stable foam. The rumen expands, presses on the diaphragm, and causes suffocation. High-concentrate diets have been considered to be the cause of bloat in feedlot cattle. However, high- concentrate diets fed free- choice to cattle at the Lethbridge Research Station and in some commercial feedlots have resulted in a low incidence of bloat. This low incidence was attributed to differences in feed preparation rather than to differences in feed composition. One characteristic that was seen to vary among high-concentrate diets used in the feedlots was feed particle size. We decided to examine the influence of feed particle size on the rumen fluid and the formation of the foam that is associated with bloat. We found that when finely ground feed was fed to fistulated cows (animals with a permanent porthole in its side) the frothy foam developed in the rumen. AVOID DISAPPOINTMENT ORDER YOUR BABY HOW! Write For Price CO-OP HATCHERY 525 4th St. S. Alberta Phone 327-3679 The rumen fluid had a high viscosity, high carbohydrate content, and was highly acidic, all of which contributed to the foam formation. Miscro- scopic examination of the rumen contents of bloated cattle showed large 'numbers of reptured bacterial cells as well as intact bacteria with ex- cessive amounts of slime on their surface. Neither of these conditions was seen in unbloated cattle. The bacteria cells had released large quantities of carbohydrate granules which, in con- junction with the slime formed by the living bacteria and the debris of the dead cells, resulted in the high viscosity of the rumen fluids. In addition to the reduction of bloat, steers fed coarse feed gained an average of one quarter pound per day more than steers fed fine feed of the Spraying rapeseed Tests conducted by Agriculture Canada scientists to rid rapeseed crops of bertha armyworm show ground spraying may be an acceptable alternative when aerial application is uneco- nomical or imprac- tical WANTED: VIRUS-RESISTANT POTATOES Agriculture Canada scientists are trying to combine virus-resistance" with other qualities desirable in commercial potatoes. To this end, they are growing unattractive wild species whose native habitats range from Argentina, Central America, Mexico and the southwest United States, hoping to tap their desirable genetic qualities and cross them with our commercial potatoes. same composition. Based on 250 days of feeding, this would amount to over 60 pounds of extra gain for cattle on the coarse feed. As. a result of this research, feedlot operators should find it more profitable to use coarse particle-size feed for their cattle. Tempering of grain with water prior to milling, reducing speed of hammer mills, and adjusting mill equipment have been used satisfactorily to produce a coarse particle-size feed. A side benefit from processing feed in this manner is a reduction in the amount of dust the feeder and his cattle are exposed to. TRAVEL'S A PLEASURE AND LIFE'S A BREEZE WITH THE ALL NEW... "CUSTOM BUILT" WES-T-RAVEL TRAILERS TRAVELLING... OR CAMPING Bid farewell to costly vacations: reservations, rollaway beds crowded parking, high-priced meals. Travel the happy way: freedom to roam, plenty of room, and your own portable home. We have two sizes to meet your family's needs outdoorsmen and comfort lovers alike: choose from 14 foot and 17 foot models in your choice of interior equipment including Toilet, Fridge etc. fuliy contained and fully insulated. Easy towing with any sized car may be set up in just a few minutes. See and Price Them NOW... AT JENSEN WELDING TABER, ALBERTA P.O. Box 2216 Phone 223-2544 MARKET YOUR CATTLE. CALVES. HOGS AND SHEEP WHERE THE PRICES ARE SET! BUYERS NEED YOUR LIVESTOCK... Rhki ttm bid for IMr sippdis it THE LETHBRIDGE PUBLIC LIVESTOCK MARKET Call Your CO-OP 327-4010 oivvfMiwQ Power, price IMM from Mhicti all against auppNea in aatea an MADE: HOG ASSEMBLERS Farm HOG ;