ARTICLE 70 FEED & ADDITIVE MAGAZINE March 2023 NC: Negative Control (-30kcal/-0,3%CP) / CO-NQ: CO with NQ “on-top” / NC-NQ: NC with NQ and its “matrix” application. When used “on-top” NQ had a lower feed intake (-2,2%) but a similar final body weight, resulting in a significantly improved feed efficiency (-2,5%; P<0,05). Considering the current local feedstuffs price and the bird performance of this trial, it was calculated that using NQ on-top of the feed brought a return on investment (ROI) of 5 to 1 for the operation. When used with Matrix: First, at day 35, the broilers fed the negative control diet impaired performance as compared to the birds fed the control diet (-1,3% BW and +1,1% FCR). When used in a diet formulated with a matrix value of 30kcal and 0,3% crude protein, NQ improved feed efficiency as compared to NC (P <0,05) and helped restoring the bird performance as compared to CO. It even numerically improved BW and FCR beyond the control diet (CO). Therefore, the matrix value of 30kcal/0,3%CP can be considered as conservative. From an economics standpoint, there is a high interest of using NQ technology with a matrix value. It allows to save feed costs and brings even additional performance. Based on current local feedstuff price and performance in this trial, it represented a net profit for the producer (0,016€ Profit/kg Live Weight). Performance improvement upon the addition of NQ treatments was accompanied with an improvement of the gut morphology as compared to CO: longer villi height (P < 0,05) for a similar villi height to crypt depth ratio. These results indicate that the absorption capacity was increased while the cell renewal needed for longer villus height did not come at the costs of energy for growth. Besides, further investigation have shown that NQ technology could reduce the levels of C. Perfringens and Coliforms and improved the level of Lactobacillus in the diets formulated either with or
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