What question did this study set out to answer?

To determine the effect of dietary nitrogen solubility on nitrogen utilization in lactating dairy cows across varying dietary crude protein levels.

December 1, 1976Journal of Dairy ScienceOpen Access

Effect of Nitrogen Solubility on Nitrogen Lactating Dairy Cattle

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Authors

TAT.E. Aitchison DMD.R. MertensAgricultural Research Service AMA.D. McGilliardMonsanto (United States)

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Implication

Latin-square crossover trial shows higher utilization of insoluble versus soluble nitrogen in lactating cows, indicating reduced nitrogen solubility improves dietary protein efficiency.

Key Points

To determine the effect of dietary nitrogen solubility on nitrogen utilization in lactating dairy cows across varying dietary crude protein levels.
Conducted three 12-week nitrogen-balance trials using a 4x4 Latin-square design in 4 high-producing Holstein cows per trial at 30 to 45 days postpartum.
Fed complete diets consisting of 55% corn silage and 45% grain with crude protein levels of 12%, 13%, and 15% across trials, adding urea to provide approximately 0%, 8%, 16%, or 24% of dietary nitrogen (solubility range: 31.5% to 48.7%).
Analyzed nitrogen utilization coefficients for soluble and insoluble nitrogen using a multiple linear-regression model.
Nitrogen utilization coefficients for both soluble and insoluble nitrogen remained relatively constant across diets containing 12%, 13%, and 15% crude protein.
Insoluble nitrogen demonstrated a consistently greater utilization coefficient than soluble nitrogen in each of the three trials.

Cite This Study

Aitchison et al. (1976) studied this question.

synapsesocial.com/papers/6a8b9252115600188cfb3f0a https://doi.org/10.3168/jds.s0022-0302(76)84487-6

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Implication

Latin-square crossover trial shows higher utilization of insoluble versus soluble nitrogen in lactating cows, indicating reduced nitrogen solubility improves dietary protein efficiency.

Effect of Nitrogen Solubility on Nitrogen Lactating Dairy Cattle

Discussion

Member takes

Implication

Key Points

Cite This Study

Effect of Nitrogen Solubility on Nitrogen Lactating Dairy Cattle

Discussion

Member takes

Implication

Key Points

Cite This Study

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