Impact of supplemental phosphorus source on phosphorus utilization in lactating dairy cattle

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dc.contributor.author Bradford, Barry J.
dc.contributor.author Harner, Joseph P.
dc.contributor.author Brouk, Michael J.
dc.date.accessioned 2010-11-22T17:54:59Z
dc.date.available 2010-11-22T17:54:59Z
dc.date.issued 2010-11-22
dc.identifier.uri http://hdl.handle.net/2097/6584
dc.description Dairy Research, 2009 is known as Dairy Day, 2009 en
dc.description.abstract Supplemental phosphorus (P) in various forms and sources (pellet, meal, liquid, and corn dried distillers grains with solubles; DDGS) were compared in 12 multiparous Holstein cows producing 94.8 lb of milk (115 ± 55 days in milk) in a 4 × 4 Latin square with 21-day periods. The pellet and meal diets contained monocalcium phosphate with a wheat middlings carrier, and the liquid diet contained ammonium polyphosphate in a cane molasses base. The DDGS supplied an organic P source. Cows were blocked by parity, days in milk, and milk production and randomly assigned to treatments. Phosphorus intakes were similar among all 4 diets (116, 116, 119 and 118 g/day for pellet, meal, liquid and DDGS diets, respectively). Cows consuming the liquid diet experienced greater (P < 0.001) sugar intakes. Milk yield differed (P = 0.05) among diets, with the DDGS diet yielding the most milk (76.3, 78.1, 75.2 and 80.5 lb/day for pellet, meal, liquid, and DDGS diets, respectively). There were no differences in milk fat and milk protein percentages or in daily lactose production. Excretion of P in feces tended (P = 0.07) to differ among treatments (67.4, 66.3, 57.5, and 60.0 g/day for pellet, meal, liquid and DDGS diets, respectively), resulting in a trend (P = 0.10) for greater P retention from diets, resulting in less P excretion. Secretion of P in milk did not differ among treatments. These data show that supplemental P source does not affect dry matter intake or P intake. Phosphorus source resulted in slight differences in P utilization, but it was not related to sorting of the diet. The DDGS diet showed responses similar to those of inorganic P mineral supplements and had favorable production yields, indicating that DDGS is an adequate substitute for mineral sources of P. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 10-103-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 1021 en_US
dc.relation.isPartOf Dairy Day, 2009 en_US
dc.subject Dairy en_US
dc.subject Dried distillers grains en_US
dc.subject Feces en_US
dc.subject Phosphorus en_US
dc.subject Milk yield en_US
dc.title Impact of supplemental phosphorus source on phosphorus utilization in lactating dairy cattle en_US
dc.type Conference paper en_US
dc.date.published 2009 en_US
dc.citation.epage 51 en_US
dc.citation.spage 46 en_US
dc.description.conference Dairy Day, 2009, Kansas State University, Manhattan, KS, 2009
dc.contributor.authoreid mbrouk en_US
dc.contributor.authoreid bbradfor en_US
dc.contributor.authoreid jharner en_US


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