{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,5]],"date-time":"2026-10-05T21:33:00Z","timestamp":1791235980556,"version":"4.1.0"},"reference-count":34,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2005,3,1]],"date-time":"2005-03-01T00:00:00Z","timestamp":1109635200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["DMR\u20100084402"],"award-info":[{"award-number":["DMR\u20100084402"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2005,3]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Modifying poultry diets by reducing mineral P supplementation and\/or adding phytase may change the chemical composition of P in manures and affect the mobility of P in manure\u2010amended soils. We studied the speciation of P in manures produced by broiler chickens and turkeys from either normal diets, or diets with reduced amounts of non\u2010phytate phosphorus (NPP) and\/or phytase, using a combination of chemical fractionation and synchrotron X\u2010ray absorption near edge structure (XANES) spectroscopy. All broiler litters were rich in dicalcium phosphate (65\u201376%), followed by aqueous phosphate (13\u201318%), and phytic acid (7\u201320%); however, no hydroxylapatite was observed. Similarly, normal turkey manure had 77% of P as dicalcium phosphate and had no hydroxylapatite, while turkey manure from diets that had reduced NPP and phytase contained equal proportions of dicalcium phosphate (33\u201345%) and hydroxylapatite (35\u201339%). This is attributed to the higher total Ca to P ratio (&gt;2) in modified turkey manures that resulted in transformation of more soluble (dicalcium phosphate) to less soluble P compounds (hydroxylapatite). Chemical fractionation showed that H<jats:sub>2<\/jats:sub>O\u2010extractable P was the predominant form in broiler litter (56\u201377%), whereas aqueous phosphate determined with XANES was &lt;18% indicating that H<jats:sub>2<\/jats:sub>O probably dissolved mineral forms of P (e.g., dicalcium phosphate). Results show that HCl extraction primarily removed phytic acid from broiler litters and normal turkey manure, while it removed a mixture of hydroxylapatite and phytic acid from modified turkey manures. The combination of chemical fractionation and XANES provided information about the nature of P in these manures, which may help to devise best management practices for manure use.<\/jats:p>","DOI":"10.2134\/jeq2005.0687","type":"journal-article","created":{"date-parts":[[2010,6,14]],"date-time":"2010-06-14T02:49:51Z","timestamp":1276483791000},"page":"687-697","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":115,"title":["Phosphorus Speciation in Broiler Litter and Turkey Manure Produced from Modified Diets"],"prefix":"10.1002","volume":"34","author":[{"given":"Gurpal S.","family":"Toor","sequence":"first","affiliation":[{"name":"Department of Plant and Soil Sciences University of Delaware Newark DE 19716"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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