ARTICLE FEED & ADDITIVE MAGAZINE May 2022 75 um phosphate is less digestible than monocalcium phosphate, and anhydrous is less digestible than hydrated. Therefore, an increase in the amounts of monocalcium and hydrated forms of phosphates would lead to an increase in digestibility. Along the same line, monosubstituted phosphates, such as monocalcium and monosodium phosphates, are the most water-soluble phosphates, which suggests that increased water solubility should be associated with increased availability and digestibility. GlobalFeed has developed a methodology based on different analytical parameters to quantify and qualify the chemical balance and total composition of phosphates. The results were evaluated to estimate digestibility values using the literature, nutritional studies and finally internal in vivo trials. Together, these parameters allow us to assign digestibility values to the phosphates produced by GlobalFeed. Due to the extreme volatility of the actual market situation, and also due to the ongoing reduction in the market supply of feed phosphates, it is necessary to improve the product design in order to obtain phosphates with maximum efficiency and better sustainability for the future of animal production. The design of Socalphos+ allows us to combine calcium phosphate with monosodium phosphate, the latter of which replaces the dicalcium fraction, which has been shown to lower calcium levels. This monosodium level has several advantages in terms of mineral nutrition, the most evident being an increase in phosphorus solubility in water and digestibility, followed by the inclusion of a sodium source that helps to improve the electrolytical balance and reduce the acid binding capacity of the feed. This sodium level replaces the inclusion of salt, thereby reducing the level of chloride, which is known to have a negative impact on the electrolytical balance (Na+K-Cl). Additionally, this could eliminate sodium bicarbonate, which has a high buffering effect in the gut. In 2021, a trial was conducted by the Polytechnic University of Valencia, Spain to evaluate the monosubstituted sodium and calcium phosphates in SOCALPHOS+ vs. conventional MCP and pure MCP on the productive performance and digestibility of broilers. To measure the phosphorus digestibility of phosphates, 64 male chicks were housed in pairs in 32 digestibility cages at 15 days of age. After an adaptation period of one week, the trial was started at 21 days of age. The experimental design was divided into 4 treatments with 8 replicates per treatment, one of which did not include a mineral
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