calcium soures

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Permalink Reply by Jack zhang on March 11, 2010 at 12:24am

Good idear ,then I lose my job to market the caclcium phosphate , i can find the better solution about the feed supplment.

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Permalink Reply by dr sandeep bansal on March 12, 2010 at 3:07am

calcium phosphate(rock)is a poor sourse of calcium about 35 % then calcium oxide 71% (more than double) . calcium in calcium phosphate(rock) is also poor absorable for ruminants about 30 % then calcium oxide 50 % (according to NRC ) it means total absorable calcium in calcium phosphate is about 10.5% & in calcium oxide is 30.5% that is near three times . calcium oxide is much cheaper than calcium phosphate calcium oxide is also a very good buffer having a ph about 12.5

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Permalink Reply by Antony on March 12, 2010 at 1:15am

I think its impossible, because: CaO (s) + H2O (l) is in equilibrium with Ca(OH)2 (aq) (ΔHr = −63.7 kJ/mol of CaO)

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Permalink Reply by dr sandeep bansal on March 12, 2010 at 3:13am

both cao & ca(oh)2 are very good sourse of calcium (71%&54%)with good absorabablity in ruminants (50%&55%)

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