Research project Low protein feeding as a nitrogen measure for beef cattle
General introduction
The ELP-Beef project has delivered a crucial product that was lacking for the recognition within PAS (Systematic Nitrogen Approach) of low-protein rations for cattle as an ammonia emission reduction (AER) measure. This is the long-awaited, field-tested, user-friendly application that allows beef cattle farmers to demonstrate that they are indeed applying low-protein feed correctly. Previous research had already shown that a lower protein content in the ration can significantly reduce ammonia emissions from beef cattle farms. Application with certified proof would therefore help to achieve a 5% reduction in NH3 at farm level, without farm closures or significant reductions in livestock numbers. The bottleneck was verifiability: how can it be objectively verified that a farm is effectively applying the low-protein diet? With the application developed and the accompanying agreements with the government, a concrete answer has been worked out.
Research approach
The project was carried out in four consecutive phases. First, in consultation with the competent authorities, the conditions that a beef cattle farm must meet in order to make the use of low-protein feed demonstrable and verifiable were established; these conditions formed the substantive framework. The researchers then developed a user-friendly application in which livestock farmers can enter data on rations, animal numbers, feed stocks, and feed values. In collaboration with livestock farmers and feed companies, a database was also built up with Flemish practical rations, which serve as a reference for the crude protein content on beef cattle farms. Finally, the application of low-protein feed was monitored for one year on three beef cattle farms, with a focus on achieving the target protein levels, the data registration methodology, and the user-friendliness of the application. Based on this positive evaluation, low-protein feed can be proposed as a source-oriented, effective, and verifiable AER measure for inclusion in the official list of reduction techniques for beef cattle fattening farms at the end of 2025.
Relevance/Valorization
The results of ELP-Beef clearly show how beef cattle farmers can demonstrate in practice, in a substantiated and verifiable manner, that they are correctly applying low-protein feed. The combination of clear conditions, a reference database with practical rations, and a user-friendly application ensures that the measure is not only technically but also administratively feasible. This is relevant for beef cattle farmers, advisors, feed companies, and policymakers who are looking for workable source measures to reduce ammonia emissions. Given the major challenges surrounding ammonia reduction, additional, practically implementable, and cost-effective nitrogen-reduction measures for beef cattle farms remain necessary, but this project shows that low-protein feed can play an important role in this.
