Relaties tussen verschillende chemische kenmerken in graskuil: data uit het project Netwerk Praktijkbedrijven

Samenvatting

The project Netwerk praktijkbedrijven (NPB) was initiated in 2020 with the aim of reducing emissions of methane and ammonia by 30% compared to the reference year 2020. Reduction of ammonia emissions can be quite effective by reducing the protein content of rations. For reducing enteric methane emissions, feeding grass silage with a low fiber content is an option. Although it is qualitatively known what the effect of grass growth stage is on NDF (fibre), crude protein, and sugar contents, as well as what the effect of dry matter content is on DVE (intestinal digestible protein) and OEB (rumen protein balance) contents, there is a lack of quantitative insight into relationships between the different characteristics. From the NPB project, a large dataset of grass silage analyses is available that could be used to determine the aforementioned relationships. This study investigated to what extent NDF, DVE, OEB, and VEM (net energy value) contents of grass silages are correlated with characteristics of grass silages such as dry matter, crude ash, crude protein, sugar, and number of grass cut.