Meta-analysis: Setup and results
In recent years, several faecal metabolic studies by Orffa Additives BV with male broilers (Cobb 500, Ross 708 and Ross 308) have been performed to examine the effects of the nutritional emulsifier, Excential Energy Plus. These studies have provided unambiguous results, but a quantitative (meta-) analysis of existing data was lacking. Current meta-analysis (Table 1) aims to quantify the measurable impacts of the nutritional emulsifier on the digestibility of the feed.
This meta-analysis involves 5 published metabolic trials run at various universities and independent research facilities around the world. Diets in these studies were formulated
based on corn, soybean meal, wheat, meat and bone meal in varying concentrations. Added oils included vegetable oils (e.g. soybean oil, mixed vegetable fatty acids) and animal fats (e.g. poultry fat). The nutritional emulsifier, Excential Energy Plus, was always added on top at 350g/ton of feed for the duration of the metabolic period. After an adaptation period, faeces were collected at the end of the metabolic period for a number of consecutive days and analysed on energy, dry matter, crude fat and crude protein content. Simultaneous analysis of faeces from birds fed diets without Excential Energy made it possible to calculate the specific effect of the nutritional emulsifier.
The results show that, under the specified trial conditions, the emulsifier is able to increase energy, crude fat, dry matter and crude protein digestibility to a high extent in all metabolic studies. The increase in energy digestibility seems to depend on the crude fat percentage in the diet. The application of the emulsifier in study E results in a very high increase in crude fat digestibility and can be linked to the high amount of added fat in the diet. Studies A, B, C and D show comparable added fat percentages and energy digestibility upgrades.
Saving energy and money
Energy is a major cost component in diets for high-performing animals. The nutritional emulsifier engineered by Orffa Additives BV can be used to improve energy, dry matter, crude fat and crude protein digestibility as shown and confirmed in energy-reduced validation tests. From a practical point of view, this means that nutritionists are able to ormulate diets with a lower energy content and keep the same performance. This will result in lower feed costs and contribute to more economical and sustainable animal production.