The effect of supplementation（補充物）with different levels of cracked corn （破碎玉米）[maize（玉米）] on the sites （地址）of organic matter(OM),total dietary（） fibre(TDF),ADF and starch digestion in steers fed fresh lucerne indoors was determined.Six Angus steers(338kg)fitted with cannulae in the rumen,duodenum and ileum consumed:lucerne(20.4%CP m41.6%NDF)ad libitum(AALF);AALF supplemented(S) with cracked corn 0.4,0.8 or1.2% body weight(BW),respectively;or lucerne restricted at the average level of forage intake of S steers(RALF),in a 5*5 Latin square design.Total OM intake was lower(P<0.01)in steers fed RAlF than in those fed AALF but level of forage intake did not affect sites of OM,TDF or starch digestion.Forage OM intake decreased(p<0.01)linearly (8496 to 5840 g\day) but total OM intake increased (P=0.03) linearly(8496 to 9344 g\day) as corn increased from 0.4 to 1.2% BW.Rumen apparent and true OM disappearance was not affected,but OM disappearing in the small intestine increased(P<0.01) linearly with increasing levels of corn.Total tract of OM digestibility (71.2 to76.2%) and the proportion of OM intake that was digested in the small intestine (15.4 to 24.5%) increased (P<0.01)linearly as corn increased. The TDF and ADF intakes decreased (P<0.01) linearly as level of corn increased.Total tract TDF and ADF digestibilities were not different among treatments (average 62.9and 57.8%,respectively).Starch intake and starch digested in the rumen and small and large intestine increased(P<0.01)linearly with increasing corn level .Rumen pH and VFA concentrations decreased and increased (P<0.01),respectively ,with increasing corn.Supplementation with corn increased OM intake,decreased forage OM intake ,and increased the proportion of OM that was digested in the small intestine ,but fibre digestion was not affected.作者: ３８５２３８７ 時間: 2009-6-22 21:54
唉，英語沒學好，我也翻譯不了！作者: 流流淚 時間: 2009-6-23 11:07
不好意思，太多了，我也翻譯不了?？梢圆椴閷I(yè)書籍。最好查畜牧業(yè)的。作者: gzbjzwh 時間: 2009-6-23 13:15 本帖最后由 gzbjzwh 于 2009-6-23 13:16 編輯