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The 40\u2010day study evaluated the effects of Ca level (4, 7 and 10\u00a0g\/kg diet) and Ca source (Ca from Ca<jats:styled-content style=\"fixed-case\">CO<\/jats:styled-content><jats:sub>3<\/jats:sub> and from <jats:italic>Lithothamnium calcareum<\/jats:italic>) on mineral utilisation in 72 piglets (7.9\u00a0\u00b1\u00a01.0\u00a0kg <jats:styled-content style=\"fixed-case\">BW<\/jats:styled-content>) fed an exogenous phytase containing diet with 2.9\u00a0g digestible P\/kg. Measured parameters were growth performance, stomach mineral solubility, bone breaking strength and urinary, serum and bone mineral concentration. The apparent total tract digestibility of minerals was also assessed in the two diets with 7\u00a0g Ca\/kg, using 12 additional pigs. Regardless of Ca source, increasing dietary Ca impaired feed conversion ratio, increased urinary <jats:styled-content style=\"fixed-case\">pH<\/jats:styled-content>, increased serum and urinary Ca, decreased serum and urinary P, decreased serum Mg and increased urinary Mg, increased serum <jats:styled-content style=\"fixed-case\">AP<\/jats:styled-content> activity, decreased bone Mg increased bone Zn. Bone breaking strength was improved with 7 compared to 4\u00a0g Ca\/kg. Compared to Ca<jats:styled-content style=\"fixed-case\">CO<\/jats:styled-content><jats:sub>3<\/jats:sub>, Ca from <jats:italic>Lithothamnium calcareum<\/jats:italic> increased serum Mg and with, 10\u00a0g Ca\/kg, it limited body weight gain. The dose response of Ca in a diet with 2.9\u00a0g digestible P\/kg and including exogenous phytase indicated that: (i) a low dietary Ca was beneficial for piglet growth, but was limiting the metabolic use of P; (ii) a high dietary Ca level impaired P utilisation; (iii) the optimal P utilisation and bone breaking strength was obtained with a dietary Ca\u2010to\u2010digestible P ratio of 2.1 to 2.4:1; (iv). Increasing dietary Ca reduced Mg utilisation, but not Zn status, when fed at adequate level. Finally, Ca from <jats:italic>Lithothamnium calcareum<\/jats:italic> had similar effects on Ca and P metabolism as Ca<jats:styled-content style=\"fixed-case\">CO<\/jats:styled-content><jats:sub>3<\/jats:sub>, but impaired growth when fed at the highest inclusion level.<\/jats:p>","DOI":"10.1111\/jpn.12582","type":"journal-article","created":{"date-parts":[[2016,11,21]],"date-time":"2016-11-21T08:23:52Z","timestamp":1479716632000},"source":"Crossref","is-referenced-by-count":16,"title":["Effect of dietary calcium level and source on mineral utilisation by piglets fed diets containing exogenous phytase"],"prefix":"10.1111","volume":"101","author":[{"given":"P.","family":"Schlegel","sequence":"first","affiliation":[{"name":"Agroscope Posieux Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Gutzwiller","sequence":"additional","affiliation":[{"name":"Agroscope Posieux Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2016,11,21]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1079\/ASC200676"},{"key":"e_1_2_7_3_1","unstructured":"Agroscope 2006:F\u00fctterungsempfehlungen und N\u00e4hrwertabellen f\u00fcr Schweine. 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