Effect of zeolite inclusion for finishing feedlot lambs: growth performance and dietary energetic.

摘要: The aim of this study was to evaluate the effect of different supplemental levels (0, 1.5, 3 and 4.5%) of zeolite in total mixed finishing diets on the productive response and efficiency of using dietary net energy in hairy lambs. For this aim, 40 3/4 Katahdin × 1/4 Pelibuey lambs (initial weight=32.28±2.34 kg) were assigned to 20 pens (2 lambs/pen, 5 pens/treatment) and were fed for 75 days on one of the four treatments. Control diet (no supplemental zeolite) contained 16.51% CP and 1.39 McalNEg/kg, and the total quantity of zeolite included replaced corn and soybean meal in equal parts. For each level of which corn and soybean meal were substituted, CP concentration decreased 0.11 percentage points and net energy decreased 0.03 McalNEg/kg. The partial replacement of corn and soybean meal by zeolite at a level of 1.5% in the diet did not affect DM intake, daily gain, feed efficiency, dietary net energy (observed …