ISSUE FOCUS FEED & ADDITIVE MAGAZINE February 2024 29 phosphorus content based on total phosphorus determination as presented in the graphs figure 2 (R² are very low). Thus, determining the potential of phosphorus released by a phytase can be challenging. The Figure 2 show that there is no correlation. To go further, Adisseo has developed over 30 years a robust Near Infrared Spectroscopy (NIRS) called Precise Nutrition Evaluation (PNE). The system integrates calibrations built not only on common chemical analyses, but also in vivo digestibility tests - on growing broilers for the Apparent Metabolizable Energy (corrected or not from nitrogen – AME and AMEn) and caecectomized cockerels for amino acid digestibility. Adisseo combined the first set of chemistry analyses with animal trials, by feeding animals with the same feed samples, then collecting the feces to measure the difference between what was ingested and what was excreted. PNE is unique, as of 2023 it comprises more than 400,000 feed samples from all over the world providing a general overview of the raw material quality worldwide. This online tool offers nutritionists a fast, discriminating way to monitor the variability of the raw materials and provide digestibility data to further improve the nutrient matrix and formulate as precisely as possible. Now that we have the capacity to precisely formulate our animal feed, one should wonder how to extract the maximum value of the feed to better serve animal performance? Figure 1. Correlation between total lysine and digestibility of lysine (SID coefficient) in soyabean meal (SBM) or corn DDGS (cDDGS). Source: Adisseo NIR (PNE) data 2021-2022 Figure 2. Correlation between total phosphorous and phytic phosphorus in soyabean meal (SBM) or corn DDGS (cDDGS). Source: Adisseo NIR (PNE) data 2021-2022
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