【摘要】：本試驗采用4個不同鈣磷水平的飼糧飼喂斷奶后察哈爾羔羊,研究鈣磷對斷奶羔羊生長、鈣磷營養(yǎng)消化代謝和排放量、骨骼的影響。選取70日齡健康、體重(16.27±3.33)kg斷奶察哈爾羔羊120只(公母各半),隨機分成4個組,每組30個重復,每個重復1只羊,分別飼喂4種飼糧,其鈣磷含量分別為:Ⅰ組,0.49%、0.28%;Ⅱ組,0.55%、0.32%;Ⅲ組,0.64%、0.47%;Ⅳ組,0.87%、0.70%。飼養(yǎng)試驗期65d,其后,每組選6只羔羊(公母各半),全收糞法進行消化代謝試驗。試驗結果:1)飼糧鈣磷水平對斷奶羔羊平均日增重、體尺、干物質采食量和飼糧轉化率影響皆不顯著(P0.05);2)血清鈣含量Ⅳ組顯著高于其他3組,血清堿性磷酸酶Ⅰ組顯著高于其他3組(P0.05);3)Ⅰ組鈣表觀消化率顯著高于其他3組(P0.05),隨飼糧鈣磷水平升高羔羊鈣磷排放量增加(P0.05);4)Ⅳ組脛骨灰分含量顯著高于Ⅰ組(P0.05),Ⅰ組跖骨灰分含量顯著低于Ⅲ、Ⅳ組(P0.05),脛骨磷含量Ⅳ組顯著高于其他3組(P0.05);5)冬春季節(jié)改變羔羊飼喂模式增加了內蒙古地區(qū)草原生態(tài)系統(tǒng)中鈣磷的輸入。綜上所述,飼糧鈣磷水平升高降低了斷奶羔羊的鈣表觀消化率,顯著增加了鈣磷的排放量,提高了羔羊骨骼鈣磷沉積。在本試驗條件下,飼糧鈣磷含量分別為0.49%、0.28%,內蒙古地區(qū)冬春季斷奶羔羊即可獲得較好的生長性能。
[Abstract]:Four diets with different levels of calcium and phosphorus were used to study the effects of calcium and phosphorus on growth, digestion, metabolism and emission of calcium and phosphorus, as well as bone of weaned lambs. One hundred and twenty healthy 70-day-old (16.27 鹵3.33) kg weaned Chahar lambs (male and female) were randomly divided into 4 groups, 30 replicates in each group and 1 sheep in each repeated diet. The contents of calcium and phosphorus in group 鈪，

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