Effects of increasing CA:P ratio in diets containing phytase on growth performance of grow-finish pigs

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dc.contributor.author Hanni, S.M.
dc.contributor.author Barker, M.R.
dc.contributor.author Groesbeck, C.N.
dc.contributor.author Keegan, T.P.
dc.contributor.author Lawrence, K.R.
dc.contributor.author Young, M.G.
dc.contributor.author James, B.W.
dc.contributor.author Tokach, Michael D.
dc.contributor.author Nelssen, Jim L.
dc.contributor.author Goodband, Robert D.
dc.contributor.author Dritz, Steven S.
dc.date.accessioned 2010-02-11T22:34:45Z
dc.date.available 2010-02-11T22:34:45Z
dc.date.issued 2010-02-11T22:34:45Z
dc.identifier.uri http://hdl.handle.net/2097/2546
dc.description.abstract We used 144 growing-finishing pigs (72 barrows and 72 gilts; initially 85 lb) to determine the effects of calcium to total phosphorus (Ca:P) ratio on growth performance. Pigs were housed in an environmentally regulated finishing building with two pigs per pen and nine pens per sex per treatment in a randomized complete block design. Pigs were blocked by initial weight and sex, and then allotted to one of four dietary treatments. The dietary treatments were corn-soybean meal-based diets fed in three phases. In each phase, diets consisted of a 1:1; 1.25:1; 1.5:1, and 2:1 Ca:P ratio. Diets were formulated to contain 0.44%, 0.39%, and 0.34% phosphorus from 70 to 130, 130 to 190, and 190 to 250 lb, respectively. All diets contained 0.05% phytase, providing 300 FTU/kg of feed. For the overall experiment, increasing Ca:P ratio decreased ADG (quadratic P<0.03) and ADFI (linear P<0.05). However, the greatest decrease in ADG and ADFI was observed when Ca:P increased from 1.5:1 to 2:1. Feed to gain was not affected by Ca:P ratio. These results suggest that in growing-finishing diets containing 300 FTU/kg phytase, a Ca:P ratio greater then 1.5:1 will decrease ADG and ADFI. en_US
dc.publisher Kansas State University. Agricultural Experiment Station and Cooperative Extension Service en_US
dc.relation.isPartOf Swine day, 2002 en_US
dc.relation.isPartOf Kansas Agricultural Experiment Station contribution; no. 03-120-S en_US
dc.relation.isPartOf Report of progress (Kansas State University. Agricultural Experiment Station and Cooperative Extension Service); 897 en_US
dc.subject Swine en_US
dc.subject Calcium en_US
dc.subject Phytase en_US
dc.subject Phosphorus en_US
dc.subject Finishing Pigs en_US
dc.title Effects of increasing CA:P ratio in diets containing phytase on growth performance of grow-finish pigs en_US
dc.type Conference paper en_US
dc.date.published 2002 en_US
dc.citation.epage 165 en_US
dc.citation.spage 162 en_US
dc.description.conference Swine Day, Manhattan, KS, November 14, 2002 en_US
dc.contributor.authoreid mtokach en_US
dc.contributor.authoreid jnelssen en_US
dc.contributor.authoreid goodband en_US
dc.contributor.authoreid dritz en_US
dc.contributor.authoreid mayoung en_US

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