阉公羊对添加逐渐增多双低菜籽粕的热带草基饲粮的摄入和消化Intake and digestion by wethers fed a tropical grass-based diet supplemented with increasing levels of canola meal苏丹草、菜籽粕、玉米脂肪含量使用格哈特全自动快速索氏提取仪Soxtherm以石油醚为溶剂180摄氏度提取2小时测定使用凯氏定氮法测总氮/蛋白质中性洗涤纤维分析(用热稳定α-淀粉酶测定,扣除残灰)酸性洗涤纤维(扣灰)酸洗木质素