|Title||Evaluation of techniques to collect ileal digesta in pigs|
|Source||Agricultural University. Promotor(en): M.W.A. Verstegen, co-promotor(en): H.R. Mosenthin; L.A. den Hartog. - S.l. : Koehler - 135|
|Publication type||Dissertation, internally prepared|
|Keyword(s)||varkens - spijsvertering - laboratoria - experimenten - dissertaties - pigs - digestion - laboratories - experiments - theses|
The results of some comparative experiments using different digesta collection techniques are presented. Physiological parameters such as growth performance, nitrogen and mineral balances and various blood variables were studied in pigs fitted with post-valve T-caecum (PVTC) cannulas and end-to-side ileo-rectal anastomosis (IRA). Digestibility measurements using different techniques (PVTC, IRA, simple T-cannula and re-entrant cannula) and different diets independently were carried out. Considerable effects of IRA on the physiological status of the animals were found. Digesta composition in IRApigs was in some aspects significant different from that in PVTC-pigs. This indicates an increased fermentative activity in IRA-pigs as well as some adaptative changes in mineral absorption as a result of the absence of hind-gut absorption. Differences in digestibility measurements between different cannulation techniques were small provided that the results were calculated on the basis of marker recoveries. The effect of a sugar/starch supplementation to the diet to compensate for the absence of the hind-gut functions in IRA-pigs was studied in PVTC-pigs. There was no effect on the apparent ileal digestibility of amino acids feeding a wheat based diet. The consequences of the different effects assosiated with the different techniques for digestibility measurements are discussed.