{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,27]],"date-time":"2026-09-27T09:37:14Z","timestamp":1790501834697,"version":"4.1.0"},"reference-count":56,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2005,7,1]],"date-time":"2005-07-01T00:00:00Z","timestamp":1120176000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"name":"USDA Initiative for Future Agriculture and Food Systems","award":["2001-52103-11334"],"award-info":[{"award-number":["2001-52103-11334"]}]}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2005,7]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Effective manure management to efficiently utilize organic wastes without causing environmental degradation requires a clear understanding of the transformation of P forms from diet to manure. Thus, the objective of this study was to establish quantitative relationships between P forms in diets, feces, and manures collected from U.S. Northeastern and Mid\u2010Atlantic commercial dairy farms. Total P in diets ranged from 3.6 to 5.3 g kg<jats:sup>\u22121<\/jats:sup> dry matter, while the feces had higher P than diets (5.7\u20139.5 g kg<jats:sup>\u22121<\/jats:sup>) and manures had lower P (2.5\u20138.9 g kg<jats:sup>\u22121<\/jats:sup>) than feces. The farms with total dietary P of 4.8 to 5.3 g P kg<jats:sup>\u22121<\/jats:sup> had twofold higher concentrations of phytic acid (1647\u20132300 mg P kg<jats:sup>\u22121<\/jats:sup>) than farms with 3.6 to 4.0 g dietary P kg<jats:sup>\u22121<\/jats:sup> (844\u20131100 mg P kg<jats:sup>\u22121<\/jats:sup>). Much of the phytic acid in diets was converted to inorganic orthophosphate in the rumen as indicated by a reduction in phytic acid percentage from diets (32%) to feces (18%). The proportion of orthophosphate diesters (phospholipids, deoxyribonucleic acid [DNA]) was twice as high in feces (6.2\u201310%) as diets (2.4\u20135.3%) suggesting the excretion of microbial residues in feces. Phosphonates (aminoethyl phosphonates and phosphonolipids) were not seen in diets but were detected in feces and persisted in manures, which suggests a microbial origin. These organic compounds (phytic acid, phospholipids, DNA) were decomposed on storage of feces in slurry pits, increasing orthophosphate in manures by 9 to 12% of total P. These results suggest that reducing dietary P and typically storing feces in dairy farms will result in manure with similar chemical forms (primarily orthophosphate: 63\u201377%) that will be land applied. Thus, both the reduction of dietary P and storage of manure on farm are important for controlling solubility and bioavailability of P forms in soils and waters.<\/jats:p>","DOI":"10.2134\/jeq2004.0232","type":"journal-article","created":{"date-parts":[[2005,7,6]],"date-time":"2005-07-06T02:19:40Z","timestamp":1120616380000},"page":"1380-1391","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":80,"title":["Establishing a Linkage between Phosphorus Forms in Dairy Diets, Feces, and Manures"],"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":"Barbara J.","family":"Cade\u2010Menun","sequence":"additional","affiliation":[{"name":"Geological and Environmental Sciences Stanford University Stanford CA 94305\u20102115"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J. 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