A Net Energy Comparison of Barley and Milo for Fattening Cattle

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Abstract
The net energy of barley, milo and a 50∶50 mixture of these grains was determined at three levels of feeding at two locations in California. The average net energy values by the increment method of determination (NEP) were: barley, 56±4; milo, 59±4; 50∶50 mixture, 59±4 mcal. NE per 100 lb. of dry matter. NEm+p at ad libitum feeding levels were: barley, 64±3; milo, 71±3; 50∶50 mixture, 68±3 mcal, per 100 lb. of dry matter. There were no significant differences between these net energy figures. Feedlot response of the cattle fed ad libitum a ration containing 70% of either barley, milo or the 50∶50 mixture was not different as measured by daily gain, percent body fat or pounds of fat corrected carcass produced. These results indicate that barley and milo or a 50∶50 mixture of these grains are approximately equal in their net energy content. They result in similar feedlot response of fattening cattle fed on an ad libitum basis. There appears to be no reason for feeders to discriminate against milo as a source of energy when fed in a balanced feedlot ration. However, it must be recognized that individual lots of grain may vary because of variety or environmental differences during their production. There was a significant difference in the net energy values determined at two locations (Davis and the Imperial Valley Field Station at El Centro, California). The reasons for the lower net energy values at Davis are not known. The relationship between energy retained and food consumed above maintenance was rectilinear indicating a constant partial efficiency of feed utilization. Thus, each succeeding increment of a given ration above maintenance had a constant NEP. Copyright © 1964. American Society of Animal Science . Copyright 1964 by American Society of Animal Science

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