【摘要】 采用4个3×3拉丁方设计对12头平均体重(42±5)kg杜×长×大阉猪进行消化试验,在基础日粮中分别添加0,250,500,1000U/kg的植酸酶,评定植酸酶对菜籽粕、棉籽粕植酸磷和总磷消化率的影响。试验结果表明:(1)菜籽粕、棉籽粕中植酸磷消化率与植酸酶的添加量呈极显著二次曲线关系(P<0.001)。当植酸酶添加量分别为945U/kg和873U/kg时,菜籽粕、棉籽粕中植酸磷消化率达到最优。(2)菜籽粕、棉籽粕总磷消化率随植酸酶添加量的增加而增加。(3)植酸磷的消化率与总磷表观消化率存在极显著线性关系(P<0.001)。更多还原

【Abstract】 Based on four 3×3 Latin square design,12 growing Duroc×Landrace×Yorkshire pigs of(42±5)kg weight were used to investigate the effects of supplementation of 0,250,500,1000 U/kg phytase on digestibility of phosphoru in rapeseed meal and cottonseed meal.The results showed that:(1)The digestibility of phytate phosphorus and the added dosage of phytase was quadratically curvelinear related(P < 0.001).When 945 U/kg and 873 U/kg phytase were added to rapeseed meal and cottonseed meal respectively,the digestibilities of phtate phosphorus were the best.(2)The total phos-phorus digestibilities of rapeseed meal and cottonseed meal increased while the added dosage of phytase increased.(3)The digestibility of phytate phosphorus and apparent digestibility of total phosphorus were extremely linearly related(P < 0.001).更多还原