What question did this study set out to answer?

To evaluate the evidence on precision protein feeding strategies aimed at improving nitrogen use efficiency and reducing environmental nitrogen losses in dairy production systems.

August 14, 2026American Journal of Bioscience and BioengineeringOpen Access

Enhancing Nitrogen Utilization in Dairy Cattle by Precision Protein Feeding: A Systematic Review

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To evaluate the evidence on precision protein feeding strategies aimed at improving nitrogen use efficiency and reducing environmental nitrogen losses in dairy production systems.
Searched Web of Science, Scopus, PubMed, CAB Abstracts, Google Scholar, and grey literature sources.
Identified 1,124 initial records and included 58 eligible studies in the final systematic synthesis.
Excessive crude protein supplementation increased feed costs and nitrogen excretion without proportionally improving milk production.
Optimizing metabolizable protein, balancing lysine and methionine, synchronizing rumen-degradable protein with fermentable energy, and using controlled-release nitrogen sustained or increased milk yield and protein output.
Precision feeding interventions consistently reduced environmental losses of reactive nitrogen forms, particularly ammonia (NH3) and nitrous oxide (N2O).

Authors

GHGenet HailuEthiopian Institute of Agricultural Research

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Implication

Systematic review shows precision protein feeding improves nitrogen efficiency in dairy cattle, indicating substantial economic and environmental sustainability benefits.

Cite This Study

Genet Hailu (2026) studied this question.

synapsesocial.com/papers/6a7ec754b70b84ec8b9139b3 https://doi.org/10.11648/j.bio.20261404.15

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Implication

Systematic review shows precision protein feeding improves nitrogen efficiency in dairy cattle, indicating substantial economic and environmental sustainability benefits.

Enhancing Nitrogen Utilization in Dairy Cattle by Precision Protein Feeding: A Systematic Review

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Discussion

Implication

Cite This Study

Enhancing Nitrogen Utilization in Dairy Cattle by Precision Protein Feeding: A Systematic Review

Key Points

Discussion

Implication

Cite This Study

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