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of the energy via fermentable fiber , WCGF , specifically .
Sean “ Monty ” Montgomery , a consulting nutritionist with Corn Belt Livestock Services , at Papillion , Nebraska , and a client began exploring the notion of corn by-products in high energy rations a decade ago when corn prices were at the upper end of obscene .
Incidentally , Montgomery is also a KSU adjunct professor , who served on Spore ’ s advisory committee . Blasi was Spore ’ s major professor and also served on Montgomery ’ s PhD committee .
There were four treatments : 45 , 50 , 55 and 60 Mcals net energy for gain per 100 lbs . of feed . Spore explains common receiving diets in the industry offer 48-52 Mcals of net energy for gain .
The 45 Mcals treatment , fed ad libitum , provided the baseline to determine the amount of feed offered in the limit-fed diets . The three treatment groups were fed at decreasing levels relative to the baseline , from 95 % for the 50 Mcal group to 85 % for the group receiving 60 Mcals .
Compared to calves fed ad libitum with 45 Mcals net energy for gain , those fed with 60 Mcals were significantly more efficient during a 55-day feeding period , gaining 0.14 lbs . per day more on 1.26 lbs . less feed per pound of gain .
Spore says , “ Results from this trial indicate that limit-feeding and the increased energy in the limitfed diets does not affect stress or immune function in healthy or sick animals when compared to lowerenergy high-roughage diets fed for ad libitum intake .”
Of course , no one is going to feed one group a high-roughage , lowenergy diet in order to determine how much to feed another group receiving a high-energy diet . So , Spore explains the second trial was designed to see if feeding as a percentage of body weight would achieve similar results .
Bottom line , Spore explains , “ Limit-feeding a diet formulated to supply 60 Mcals net energy for gain at 2.2 % of body weight in order to target similar average daily gain is a more efficient feeding strategy than offering a higher-roughage , lower-energy diet at 2.4 % of body weight .”
Based on his experience , Montgomery says calves likely will consume 1.0 % to 1.1 % for the first few days after arrival . But the fact is that calves are ingesting more nutrients quicker .
“ We struggle with intake on calves that are weaned on diesel smoke ,” Montgomery explains . “ You ’ re often trying to meet their nutrient requirements on half the intake when they first arrive . With limit feeding , we ’ re restricting intake , not nutrients .”
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