Ragland D, Thomas C R, Elkin R G, Shafer D J, Adeola O
Department of Animal Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Poult Sci. 1999 May;78(5):707-13. doi: 10.1093/ps/78.5.707.
Twenty-four cecectomized and 24 intact White Pekin ducks were used in two experiments to assess the influence of cecectomy on ME and amino acid digestibility of several feed ingredients for ducks. Corn and soybean meal (SBM) were evaluated in Experiment 1, and bakery meal (BM), red dog (RD), and wheat middlings (WM) were evaluated in Experiment 2. Nitrogen-corrected true metabolizable energy and amino acid digestibility of the ingredients were assayed concurrently. In Experiment 1, TME of corn was higher (P < or = 0.05) in cecectomized ducks, and intact ducks demonstrated greater (P < or = 0.05) ability to utilize the energy in SBM. Intact ducks exhibited higher (P < or = 0.05) true digestibilities of lysine and methionine. True digestibility of tryptophan was higher (P < or = 0.05) for cecectomized ducks. True digestibility of indispensable amino acids in SBM did not differ (P > or = 0.05) between cecectomized and intact ducks. In Experiment 2, cecectomized ducks exhibited greater (P < or = 0.05) ability to utilize the energy in RD. Intact ducks exhibited greater (P < or = 0.05) ability to utilize the energy in WM. True digestibility of indispensable amino acids in BM, RD, and WM was variable. Results of the present study suggest that the effect of cecectomy on nutrient digestibility in ducks is dependent on the feedstuff assayed.
在两项实验中，使用了24只切除盲肠的白来航鸭和24只未切除盲肠的白来航鸭，以评估切除盲肠对鸭几种饲料原料的代谢能（ME）和氨基酸消化率的影响。实验1评估了玉米和豆粕（SBM），实验2评估了面包粉（BM）、红狗饲料（RD）和小麦麸（WM）。同时测定了这些原料的氮校正真代谢能和氨基酸消化率。在实验1中，切除盲肠的鸭子对玉米的真代谢能较高（P≤0.05），未切除盲肠的鸭子对豆粕中能量的利用能力更强（P≤0.05）。未切除盲肠的鸭子对赖氨酸和蛋氨酸的真消化率较高（P≤0.05）。切除盲肠的鸭子对色氨酸的真消化率较高（P≤0.05）。切除盲肠的鸭子和未切除盲肠的鸭子对豆粕中必需氨基酸的真消化率没有差异（P≥0.05）。在实验2中，切除盲肠的鸭子对红狗饲料中能量的利用能力更强（P≤0.05）。未切除盲肠的鸭子对小麦麸中能量的利用能力更强（P≤0.05）。面包粉（BM）、红狗饲料（RD）和小麦麸（WM）中必需氨基酸的真消化率各不相同。本研究结果表明，切除盲肠对鸭营养物质消化率的影响取决于所测定的饲料原料。
