A meta-analysis on in situ ruminal degradability of grains and meals for energy concentrate feeds

Abstract

One factor that may interfere with rumen fermentation is the physical form of feed, because of the colonization by bacteria during processing. Here, we aimed to perform a meta-analysis and evaluate the in situ ruminal degradability of energy feeds with distinct physical forms (grain vs. meal). We created a database, comprising 39 treatments from 12 studies conducted in Brazil, and focused on parameters for the potential and effective degradability of dry matter (DM) and crude protein (CP) of energy feeds. The results showed that there was no difference (P > 0.05) in any of the degradability parameters of DM and CP between the grain and meal. However, the readily soluble fraction of DM in the grain showed a higher degradability trend (P = 0.0888). Overall, it was concluded that the processing of energy feeds does not modify the degradability parameters of DM and CP, and that further studies need to be conducted in Brazil to evaluate the in situ ruminal degradability of starch.

Modification of dietary rumen degradable starch content by chemical processing of feed ingredients: A meta‐analysis

“…However, this study concluded that, quantitatively, the decrease was only found in EE and DM. Different results were obtained byBusanello et al (2018) through a metaanalysis study that there is no effect of DM from physical processing on the nutrient content of feed ingredients. The DM loss in large quantities will have a negative impact on the nutrient content in available for absorption by ruminants.…”

Potential degradation and colonization time of ruminal microorganisms on the particles of different oilseeds-crushed, and its chemical composition

“…Ingredients that present protein from natural sources are usually expensive, but the inclusion of nitrogen compounds of non-protein origin in the diet makes it possible to reduce production costs, since it has a lower price per unit of protein equivalent. Therefore, the use of these ingredients that promote a greater release of ammonia in the rumen allows the optimization of the nitrogen use, increasing the consumption, due to the improvement in the ruminal fermentation; thus, maximizes ruminal metabolism; which will consequently benefit animal performance (Seo et al 2010;Busanello et al 2018). Corn (carbohydrate) is used as a starch source, being the main energy component of the concentrates.…”