Phytase is an enzyme that breaks down the un-digestible phytic acid portion in grain and oil seeds and releases digestible phosphorous that the pig can use. It was being used in this study to determine if the extent of the manure analysis variations and production efficiencies between the phytase and controlled pigs.
The current department of natural resources (DNR) manure management plan uses nitrogen as the base for land application rates of manure. However, a proposal has been submitted by the DNR to the Iowa legislation to convert to a phosphorous base. Therefore, when and if this legislation is passed, the acres needed for manure application would essentially double for continuous yearly application.
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Article made possible through the contribution of Iowa State University.