利用体外产气法评定反刍动物饲料的营养价值

试验利用体外产气法评定反刍动物饲料的营养价值。对花生藤、木薯渣、柠檬酸渣和甜叶菊渣4种原料进行体外发酵试验,通过测定各种原料的24h累计产气量、干物质(DM)降解率和细菌氮含量来评定其对反刍动物的营养价值。试验结果表明:花生藤、木薯渣、柠檬酸渣和甜叶菊渣的24h累计产气量分别为93.50、106.25、117.25和54.33ml;DM降解率分别为34.76%、48.34%、24.66%和33.63%;细菌氮含量分别为1.48、1.10、1.54和1.59mol/(g·ml)。总体来看,这几种饲料可以作为反刍动物的新型饲料资源加以推广利用,而且用体外产气法评定反刍动物饲料的营养价值是可行的。

This experiment setted peanut vine,cassava dregs,citric acid residue and Stevia rebaudiana residue as raw material to evaluate the nutrition value of ruminant feeds in vitro.By determining the volume of gas production （GP）,the digestibility of dry matter（DM）and the content of bacterial nitrogen,the nutrition value of them on ruminant was evaluated. The results showed that the volume of GP of 2 g peanut vine,cassava dregs,citric acid residue and Stevia rebaudiana residue was 93.50,106.25,117.25 mL and 54.33 mL respectively.The DM digestibility of them was 34.76 % ,48.34 %, 24.66 % and 33.63 % respectively.The contents of bacterial nitrogen of them were 1.48,1.10,1.54 mol/（g-mL） and 1.59 mol/（g＇mL） respectively.In a word,these feeds can be used as the new feed resource to extend in future.The method which evaluates the nutritional value of the ruminant feeds in vitro is feasible.