Effects of various hay: concentrate ratios on nutrient utilization and production responses of dairy cows
| dc.contributor.author | Bloom, S. | |
| dc.contributor.author | Jacobson, N.L. | |
| dc.contributor.author | Allen, S.S. | |
| dc.contributor.author | Mcilliard, L.D. | |
| dc.contributor.author | Homeyer, P.G. | |
| dc.date.accessioned | 2014-06-16T10:36:55Z | |
| dc.date.available | 2014-06-16T10:36:55Z | |
| dc.date.issued | 1957-03 | |
| dc.description.abstract | A digestibility study made with the chromic oxide ratio technique was conducted with 36 dairy cows. Four ratios of hay to concentrates (replacement on an Estimated Net Energy basis), three feeding levels, and three ability levels were employed. The nature of the fecal excretion pattern of chromic oxide, under the wide range of conditions imposed by the experimental design, also was studied. From the high to the low hay rations, the dry matter digestibilities were, respectively, 54.5, 58.5, 55.2, and 63.1%. Dry matter digestibilities for high, medium, and low ability cows were 58.2, 58.1, and 57.2%, respectively, and for high, medium, and low feeding levels were 57.6, 57.8, and 58.2%. Digestibility values for the individual nutrients also are reported. In this study, the fecal excretion of chromic oxide followed a diurnal pattern. Maximum excretion of chromic oxide was observed in samples taken at. 5-A.M. or 9 A. M. and the minimum excretion was observed in samples at 5 p. M. or 9 P. M. This diurnal excretion pattern was largely independent of the wide variation in the physical nature of the rations and of the feeding level. | en_US |
| dc.identifier.citation | Reprinted from Journal of Dairy Science, March, 1957, Vol. XL, No. 3, Pages 240-251 | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/2964 | |
| dc.language.iso | en | en_US |
| dc.title | Effects of various hay: concentrate ratios on nutrient utilization and production responses of dairy cows | en_US |
| dc.title.alternative | Observations on ration digestibility and on the excretion pattern of chromic oxide | en_US |
| dc.type | Article | en_US |