| 摘要 |
Ruminant feed compositions that improve the nitrogen intake retained by the ruminant and the production of volatile fatty acids in the rumen are formulated to contain protein, carbohydrates and as a source of nonprotein nitrogen, a mixture of urea and melamine. The ratio of the weight of the urea nitrogen to the weight of melamine nitrogen is preferably between about 0.8 and about 1.2 and the sum of the weight of the urea and melamine nitrogen constitutes preferably between about 25 and about 50 percent of the total nitrogen in the ruminant feed.
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