SUSTAINABILITY 60 FEED & ADDITIVE MAGAZINE June 2024 About Dr. Yves Mercier Dr. Yves Mercier graduated in 1999 with a PhD in nutrition and food science. With almost 30 years of experience in animal research, he has been in Adisseo’s R&I team for 20 years. Mercier has been Adisseo Rhodimet Scientific and Technical’s global manager since 2017 and is the leader of the amino acid metabolism team in R&I nutrition monogastric. Mercier was appointed as expert in Amino acids metabolism in 2021. His work focuses on amino acids nutrition and low protein diets to participate to the sustainable development of the worldwide animal production. effect on performance. The second outcome is to re-affirm the validity of maintaining a minimum Na/Cl ratio at 1.00, when potassium is low, to optimize FCR (Figure 1). But, increasing this ratio above 1, continues to improve Body Weight Gain (Figure 2). It was also observed that DEB value can be lower than previously established in this new formulation context. DEB values above 190 mEq/kg of feed allow maintaining an optimal FCR during the period: 0-24 days of age with a low potassium level. Increasing sodium level to reach DEB of 220-240 would lead to an increase in water intake and hence litter moisture that is not desired. The recommendation is to have a Na/Cl ratio as close as possible to 1 with a targeted dietary level in the range 0.20-0.23% for Na and Cl. The difficulty here is more to limit chloride than to increase sodium and some choice must be made to achieve the target. In fact, Acid-Base homeostasis of blood is under the domination of sodium and chloride ions whereas potassium is mainly intracellular. This means that chloride excess directly impacts the plasmatic buffering potential by anions excess, increasing the risk of metabolic acidosis due to reduced blood buffering capacity. CONCLUSION While electrolytes levels in feed in general should be more investigated with regards to new feeding practices, the need to supply sodium without chloride remains. Among chloride-free sodium sources available to supplement in feed, AdiSodium is a cost-effective source, ensuring animal performance in standard and hot climate conditions. Exhibiting a low carbon footprint, this source has benefits on sustainability for animal production by improving litter quality & reducing ammonia volatilization, thus improving animal & human well-being, and decreasing acidification. 1,25 1,26 1,27 1,28 1,29 1,3 0,8 0,9 1 1,1 1,2 1,3 1,4 1,5 1,6 0 - 20 day FCR Dietary Na / Cl Ratio 0 - 24 day broilers FCR according to Na/Cl ratio for a fixed level of potassium (0.63%) DEB=178 DEB=196 DEB=213 DEB=231 DEB=248 a b ab b b Figure 1. 0–24-day broilers FCR according to Na/Cl ratio for a fixed level of potassium (0.63%) y = 51,15x + 1380 R² = 0,8339 1410 1415 1420 1425 1430 1435 1440 1445 1450 1455 1460 1465 0,8 1,0 1,2 1,4 1,6 Body weight (g) Na/Cl ratio Figure 2. Broilers body weight according to dietary Na/Cl ratio
RkJQdWJsaXNoZXIy MTUxNjkxNQ==