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What is the difference between monocalcium phosphate and dicalcium phosphate?
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What is the difference between monocalcium phosphate and dicalcium phosphate?

Views:10     Author:Site Editor     Publish Time: 2020-08-07      Origin:Site

What is the difference between monocalcium phosphate and dicalcium phosphate?

Modern, 21st century feed production has countless options for adding nutrients; polypeptides with phytase activity, inorganic copper chelates, or polynucleotide sequences, to name a few. But the feed producer’s weaponry still holds a place for older, low-tech nutrition: phosphate feed additives. Today, dicalcium and monocalcium phosphate are still popular choices for feed supplementation, just as they were when they were first developed over sixty years ago.

 

This article contains the following:


  • What’s the Difference Between DCP and MCP?

  • Features and advantages of MCP

  • Why many feed manufacturers and producers are beginning to change from DCP to MCP


1.   What’s the Difference Between DCP and MCP?


The extra effort taken to produce MCP makes for a better final product.

MCP is highly soluble, allowing for increased flexibility in diet formulation. It is also more easily digested by farm animals, meaning that less of the feed additive is wasted and it has less impact on the environment from run off.

Anhydrous DCP has a particularly low level of phosphorus digestibility. This is in contrast to the high intake from MCP derived from DCP via the HCI production process. This method produces a feed additive of good purity and optimal phosphorus concentration.

Research comparing the various inorganic forms of phosphate feed additives was recently published in the Spanish Journal of Agricultural Research (pdf). Among other findings, this study found that in chicken diets up to the age of day 21, “ … growth response was lower when anhydrous DCP was included in the diet as compared to MCP … [there was] higher P availability in purified grade MCP diets than in DCP diets … [and that] P in the anhydrous DCP form is less available for poultry than the hydrated salt [mono-sodium phosphate].”

Previous research had already noted that, “… the highest digestibility of phosphates was recorded when combined with a 2% citric acid solution. The best results were produced by feed phosphates that do not contain fluorine, as they saturated the body with both phosphorus and calcium.” Adding that there is, “… a distinct advantage in using Monocalcium phosphate made from DCP enriched with defluorinated feed-grade phosphoric acid over other sources of phosphorus.”

 

2.   Features and advantages of MCP


Monocalcium phosphate is a powder of medium hygroscopicity (granules 0.2-1.4 mm in size) - white or grey colour, and easily soluble in a water environment. Compared with other inorganic sources of phosphorus, such as dicalcium phosphate and tricalcium phosphate, MCP has the following features and advantages:

neutralizes the harmful effects of a number of elements - sodium, potassium, magnesium, and others

ensures the proper functioning of the heart, nervous and muscular systems, as well as many other organs

improves digestion, by increasing the activity of digestive enzymes

strengthens the immune system

participates in the relocation of lipids, protein biosynthesis, and the cleansing of the intestine from harmful substances

improves the efficiency of carbohydrate, protein, fat, mineral, and energy metabolism in the body

does not contain heavy metal impurities

does not have a destructive effect on enzymes and vitamins, nor does it block the effect of proteins and the amino acids

contains the highest degree of digestibility (bioavailability)

a minimal amount of phosphorus is released in animal waste, limiting environmental pollution

contains a minimal amount of mineral mixture for maximum digestibility

 

3.   Why many feed manufacturers and producers are beginning to change from DCP to MCP


Comparative analysis of feed phosphates, conducted by chemists from leading research institutes, shows that the highest digestibility of phosphates was recorded when combined with a 2% citric acid solution. The best results were produced by feed phosphates that do not contain fluorine, as they saturated the body with both phosphorus and calcium. As a result, they found a distinct advantage in using Monocalcium phosphate made from DCP enriched with defluorinated feed-grade phosphoric acid over other sources of phosphorus. MCP has the highest phosphorus content by weight, and is a major reason why many feed manufacturers and producers are beginning to change from DCP to MCP.

The high solubility and optimal phosphorus concentration of MCP offers increased flexibility in diet formulation. The production process used increases the digestibility of the final product and, hence, increases the dietary absorption rate. It is worth noting that, MCP derived from DCP via the HCl production process has a particularly high digestibility because of its purity, while anhydrous dicalcium phosphates offer the lowest value of feeding. The second reason for feed manufacturers to change from anhydrous DCP to MCP.

 

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