Effect of Steam Flaking of Corn and Sorghum Grains on Performance of Lactating Cows
| Autor: | J.L. Sullivan, Z. Wu, C.B. Theurer, K.H. Chen, S.C. Chan, R. S. Swingle, J.T. Huber, J.M. Simas |
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| Rok vydání: | 1994 |
| Předmět: |
Hot Temperature
Starch Ruminant animal Biology Zea mays Cow milk chemistry.chemical_compound Animal science Lactation Genetics medicine Animals Sorghum (Food) Milk protein Hydrolysis food and beverages Milk Proteins Sorghum biology.organism_classification Animal Feed CORN GRAIN Milk medicine.anatomical_structure Agronomy chemistry Animal Nutritional Physiological Phenomena Cattle Digestion Female Animal Science and Zoology Edible Grain Food Science |
| Zdroj: | Journal of Dairy Science. 77:1038-1043 |
| ISSN: | 0022-0302 |
| DOI: | 10.3168/jds.s0022-0302(94)77039-9 |
| Popis: | The objective of this study was to compare the relative feeding value of sorghum versus corn grain in rolled or steam-flaked forms in diets for lactating dairy cows. Twenty-four Holstein cows (averaging 110 DIM) were divided into four groups and fed diets of 40% grain as dry-rolled sorghum, steam-rolled corn, steam-flaked sorghum, or steam-flaked corn for 70 d. Compared with rolling, flaking of both grains increased yields of milk, milk protein and fat, and protein percentage of milk, but differences tended to be greater for sorghum than for corn. Efficiency of feed utilization was higher for steam-flaked than for dry-rolled sorghum but was unaffected by corn processing. Flaking of both grains increased total tract digestibilities of DM, OM, CP, starch, ADF, and NDF. Estimates for NEL were 21% higher for flaked than for rolled sorghum and 6% higher for flaked than for rolled corn. No differences in performance of cows existed between corn and sorghum grains. Cows fed 40% of their diet as steam-flaked sorghum or corn yielded more milk and milk protein than those fed the rolled form of the grains, and no differences existed between types of grain fed. |
| Databáze: | OpenAIRE |
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