Which terms are used to express the availability of phosphorus in Swine Nutrition.
Is there a difference between hydrolysable, available and digestible Phosphorus?
Thank you Elke Humer and Rajesh M.
Elke Humer, am actually working on in vitro studies of P availability in some selected feed ingredients for swine. Thanks again for the answer. I got some insights
The most usual way of expressing P requirement and P values of diets in pig nutrition are apparent digestible phosphorus in Europe (INRA, CVB values) and bio-available phosphorus (NRC , US). The apparent digestible values are issued from a direct measurement of digestibility. The bio-available values may be obtained in differents ways , but most often diigestibility trials also in pigs, and are expressed as a percentage of a reference (generally monosodium phosphate). On average it can be assumed that the apparent digestible P = 0.90 x bio-available P.
references
INRA-AFZ Tables : http://www.wageningenacademic.com/Default.asp?pageid=8&docid=16&artdetail=Tables&webgroupfilter=108&
free software with digestible P values for pigs : http://www.evapig.com/x-home-en
May I ask the better equation to determine the retained P in pigs (25-120 kg)?
Jorge Manuel Rodrigues Tavares I dont know if this pdf can be of help. I came across it
Dear Martha,
Thank you for the file but. You send to me the general equation for the P balance. I am looking for the retention equation.
Dear Jorge,
you may check this out
http://rccp.udea.edu.co/index.php/ojs/article/view/619/596
The question is not clear. Are you asking for total phosphorous which include phytin phosphorus and readily available phosphorus. Or do you want to increase the availability of phytin phosphorous
Balagopal, I am asking for total P. I learnt from other colleagues about STTD, ATTD and TTTD.
But i still need the difference between these and which of them is synonymous to hydrolysable P (If am right)
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