"2015-01-22+01:00"^^ . . . " phytase" . " laying hens" . . . "phosphorus" . "Panel doporu\u010Duje hodnotit jako spln\u011Bno. C\u00EDle projektu byly spln\u011Bny a v\u00FDsledky byly publikov\u00E1ny ve 3 \u010Dl\u00E1nc\u00EDch v \u010Dasopisech s IF."@cs . "GA523/07/0673" . "http://www.isvav.cz/projectDetail.do?rowId=GA523/07/0673"^^ . . . "."@en . . "2009-04-22+02:00"^^ . "2007-01-01+01:00"^^ . "2009-12-31+01:00"^^ . . . . . "Hydrolysis of phytic acid in the digestive tract of laying hens"@en . . "6"^^ . . "6"^^ . " phytic acid" . . "phosphorus; phytic acid; phytase; laying hens; digestive tract"@en . "1"^^ . "1"^^ . . "Hydrol\u00FDza kyseliny fytov\u00E9 v tr\u00E1vic\u00EDm traktu nosnic" . . . "U nosnic v\u011Bku 21 a 47 t\u00FDdn\u016F zjist\u00EDme stravitelnost fyt\u00E1tov\u00E9ho fosforu obsa\u017Een\u00E9ho v krmn\u00FDch sm\u011Bs\u00EDch s rozd\u00EDlnou fytasovou aktivitou. Stanov\u00EDme v\u00E1pn\u00EDk a jednotliv\u00E9 frakce fosforu v exkrementech, rovn\u011B\u017E jejich korelace. Zjist\u00EDme distribuci fytasov\u00E9 aktivityv tr\u00E1vic\u00EDm traktu nosnic obou v\u011Bkov\u00FDch skupin, vliv diety\u00A0a z\u00E1vislost fytasov\u00E9 aktivity na pH. Budeme testovat hypot\u00E9zu, \u017Ee u nosnic krmen\u00FDch sm\u011Bs\u00ED s vysok\u00FDm pod\u00EDlem p\u0161enice je fytasov\u00E1 aktivita krmiva, mikroorganism\u016F a st\u0159evn\u00ED mukosy dostate\u010Dn\u00E1 a p\u0159\u00EDdavek komer\u010Dn\u00ED fytasy do t\u00E9to krmn\u00E9 sm\u011Bsi je mo\u017Eno\u00A0 sn\u00ED\u017Eit. Krmn\u00E9 sm\u011Bsi s vysok\u00FDm obsahem p\u0161enice jsou v \u010Cesk\u00E9 republice i st\u0159edn\u00ED Evrop\u011B b\u011B\u017En\u00E9, jinde ve sv\u011Bt\u011B jsou \u010Dast\u011Bji pou\u017E\u00EDv\u00E1ny krmn\u00E9 sm\u011Bsi na b\u00E1zi kuku\u0159ice, jej\u00ED\u017E fytasov\u00E1 aktivita je n\u00EDzk\u00E1." . "0"^^ . . "Digestibility of phytate phosphorus (P) will be determined in laying hens on two diets differring in endogenous phytase activity. Layers of different age (21 and 47 weeks) will be used. Calcium and P fractions in excreta will be assayed. Distribution of phytase activity in the digestive tract of hens, effect of age, diet and pH on the activity will be determined. A hypothesis will be tested that in laying hens fed a diet containing high proportion of wheat, the\u00A0dietary phytase activity, phytase activityof microorganisms and mucosal phytase activity are high enough to hydrolyze dietary phytate to a significant extent. Wheat-based diets are\u00A0widespread in the Central Europe, whereas in other countries maize-based diets with low endogenous phytase activityare common."@en .