纤维素酶添加量与中性洗涤纤维体外降解率的关系

通过体外降解方法测定添加纤维素酶在玉米-豆粕-麸皮、玉米-豆粕-DDGS、玉米-豆粕-杂粕型饲粮中对饲料中性洗涤纤维(NDF)降解率的影响.结果表明:添加纤维素酶可以显著提高中性洗涤纤维的降解率;饲粮中不同NDF含量与纤维素酶添加量及NDF降解率之间存在极显著的二元二次回归关系,当纤维素酶添加量为3000IU.kg-1时,NDF降解率达到最高,相对于不加酶组,玉米-豆粕-麸皮型饲粮的NDF降解率提高5.6%,玉米-豆粕-DDGS的NDF降解率提高3.7%,玉米-豆粕-杂粕型的NDF降解率提高3.16%.

Relationship of additive amount of cellulase and neutral detergent fiber (NDF) degradation rate in vitro

This study was conducted to measure the influence of NDF digestibility with the additive amount of cellulase on corn-soy-wheat bran,corn-soy-DDGS,corn-soy-mixed rapeseed and cottonseed meal in vitro.Experiment results showed that adding cellulase significantly improved degradability of NDF.It was showed that a significant binary quadratic regressions between the different NDF content,additive cellulase levels and degradability of NDF.When the additive amount of cellulase increased to 3 000 IU·kg-1,the NDF degradation rate reached the highest,contrast to the no enzyme control,the degradation of NDF in corn/soy/wheat bran increase 5.6 percent,the degradation of NDF in corn/soy/DDGS increased 3.7 %,and corn/soy/mixed rapeseed and cottonseed meal increased 3.16 %.