By Fernando Diaz

Fine-tuning and balancing diets for essential amino acids has become a common practice during recent years. In general, lysine and methionine are the main limiting amino acids in dairy cow diets. Histidine has been identified as the first limiting amino acid mainly in cows fed grass silage-based diets.

However, new research shows histidine may be a limiting amino acid in corn silage-based diets as well. In a series of studies conducted at The Pennsylvania State University’s Dairy Teaching and Research Center, researchers evaluated the effects of histidine supplementation of low-protein diets on lactation performance of high-producing dairy cows.

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