ISSUE FOCUS 32 FEED & ADDITIVE MAGAZINE April 2025 for their digestive capacity, which differs from one raw material to another and is also more limited than that of an adult animal. Working on feed formulation to adapt it to the specific physiological characteristics of growing broilers ensures that feed performance is maintained, whatever the composition of the feed. Finally, the optimal functioning of the digestive tract plays a central and decisive role in maximising the value of the feed ingested by the animal. The structural and functional integrity of the digestive tract is therefore sought through the dynamic balance between intestinal flora, immunity and digestive integrity. As a result, the digestive tract emerges as the key competitive factor in the poultry industry. Drawing on its knowledge of the physiological effects of essential oils and plant extracts, TECHNA offers Aviance, a combination of aromatic phenolic compounds protected by an innovative coating, which increases the surface area of absorption in the duodenum and jejunum. The synthesis of numerous French and international trials indicates an improvement of 2.90% and 3.50% respectively in growth and feed conversion. Thus, using Aviance in a nutritional matrix could generate a gain of €4 to €5 for equivalent performance. All these prerequisites make it possible to work accurately and reliably on the nutritional requirements of the animals and to study the various possible strategies for refining the overall feed cost depending on the context. MODELLING NUTRITIONAL REQUIREMENTS THROUGH META-ANALYSIS OF OVER 30 TRIALS The compilation of over 30 nutritional trials in the form of a meta-analysis makes it possible to predict broiler performance (weight, technical FCR, fillet and thigh yield) according to two nutritional criteria: Broiler Metabolisable Energy and Digestible Lysine. These prediction equations are incorporated into our Wefeed Projection decision-support software. However, the results need to be modulated to take account of the Broiler Metabolic Energy Variances (kcal) 111,9 100,0 94,4 -0,1 -0,05 0 0,05 0,10 -200 0 -100 100 200 Average Feed price Evolution (%) Digestible Lysine Variances (%) 115,0 110,0 105,0 100,0 95,0 90,0 85,0 Average feed price evolution (%) according to nutritional variances Graph 3. Evolution of the weighted average cost of a range of broiler feed in % according to the evolution of two nutritional criteria - digestible lysine (%) and metabolisable broiler energy (kcal). 100,0 104,00 103,00 102,00 101,00 100,00 99,00 98,00 97,00 96,00 Live cost evolution (%) according to nutritional variance Live Cost Evolution (%) Digestible Lysine Variances (%) 98,56 -0,1 -0,05 0 0,05 0,10 -200 0 -100 100 200 Broiler Metabolic Energy Variances (kcal) Graph 4. Change in the cost price of live broiler chickens in % according to changes in two nutritional criteria - digestible lysine (%) and metabolisable broiler energy (kcal).
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