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United States Department of Agriculture

Agricultural Research Service

Title: Changes in Manure Extractable Phosphorus with Metal Addition and Composting

item Sikora, Lawrence
item Meisinger, John
item McMurtry, John
item Butzler, Rachel

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: November 10, 2002
Publication Date: November 10, 2002
Citation: Sikora, L.J., Meisinger, J.J., McMurtry, J.P., Butzler, R.E. 2002. Changes in manure extractable phosphorus with metal addition and composting [abstract]. Northeast Branch of American Society of Agronomy.

Technical Abstract: High phosphorus content of manure reduces allowable application rate to fields. Manure treatments may reduce the soluble or extractable P and allow for higher application rates. Laboratory bench composter studies were conducted using poultry litter and poultry manure to determine changes in manure extractable P with composting. Neither water or Mehlich 3 extractable P changed appreciably during the composting of poultry litter. Addition of Fe and Al-containing byproducts to the litter decreased extractable P levels and composting did not change the outcome. Phosphate sorption measurements showed that Fe by-product was more effective at reducing dissolved reactive P than Al by-product and enhancing the formation in sodium hydroxide extractable P. Water extractable P levels were reduced with composting of fresh poultry manure and with Fe or Al addition. Manure type and age may affect the immobilization of P by composting.

Last Modified: 4/18/2015
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