When forced to do so, we have no choice but to reduce phosphorus excretion on poultry farms. Even where it is not mandatory, economics dictates that we attempt phosphorus excretion reduction. Research at Arkansas University suggests that we consider combining improved phosphate sources with phytase enzymes. For many years, phosphorus has been a very important factor in animal nutrition. Its use is essential in assuring strong skeletal growth and eggshell production, but it is very costly. Consequently, research over the years focused on providing adequate amounts of phosphorus at a relatively economical price. In recent years, however, the emphasis has been on the negative impacts of phosphorus on the environment, specifically its effects on surface water eutrophication. This has stimulated interest in the means of reducing phosphorus excretion (including the use of phytase enzymes) and the development of feed sources containing modified levels of phytate phosphorus.
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