Duke G E, Eccleston E, Kirkwood S, Louis C F, Bedbury H P
J Nutr. 1984 Jan;114(1):95-102. doi: 10.1093/jn/114.1.95.
To determine whether dietary preconditioning might improve fibrolysis in turkeys, Wrolstad Medium white hens were fed either a high (16.13%, HF) or low (2.80%, LF) fiber diet for 6-60 weeks. The substrate to test for cellulolysis, [14C]cellulose, was introduced into the gizzard per os or into one cecum via a cannulated fistula. Immediately after [14C]cellulose introduction, turkeys were placed in an airtight chamber (0.3 m3) from which exhaled CO2 was collected and analyzed for 14CO2. An average of 10.4% of the 14C was recovered in CO2 from turkeys fed the HF diet, and only 2.9% was recovered from the LF-fed birds that were orally dosed. In turkeys dosed via cecal cannula, recoveries averaged 15.4 and 2.9% for HF- and LF- fed birds, respectively. Recoveries were 7.0 and 1.4% in HF- and LF-fed turkeys that were cecectomized. Preconditioning to an HF diet does appear to improve cellulolysis.
为了确定日粮预处理是否可以改善火鸡的纤维分解，给Wrolstad中型白母鸡分别饲喂高纤维日粮（16.13%，HF）或低纤维日粮（2.80%，LF），持续6至60周。用于测试纤维素分解的底物[14C]纤维素，通过口服或经由插管瘘管引入一侧盲肠。在引入[14C]纤维素后，立即将火鸡置于气密箱（0.3立方米）中，收集呼出的二氧化碳并分析其中的14CO2。饲喂HF日粮的火鸡呼出的二氧化碳中平均回收了10.4%的14C，而口服给药的LF日粮火鸡中仅回收了2.9%。通过盲肠插管给药的火鸡中，HF日粮和LF日粮火鸡的回收率分别平均为15.4%和2.9%。在切除盲肠的HF日粮和LF日粮火鸡中，回收率分别为7.0%和1.4%。日粮预处理为HF日粮似乎确实可以改善纤维素分解。
