Effect of combination of fermented rice straw and peanut straw on in vitro fermentation of rumen in Hu sheep
The experiment aimed to evaluate the impact of different ratios of fermented rice straw and peanut straw on the in vitro rumen fermentation of Hu sheep by the gas production method.The straw and peanut straw were combined in the following proportions for the fermentation test:100∶0(Group T0),80∶20(Group T20),60∶40(Group T40),40∶60(Group T60),20∶80(Group T80),and 0∶100(Group T100).Five Hu sheep in good health with similar body weights were selected as rumen fluid donors.The experiment determined the in vitro fermentation parameters,including the degradation rate of conventional nutrients,gas production parameters,in vitro fermentation parameters,72-hour degradation rate of conventional nutrients,single combination effect,and multiple combination effect.The results showed that Group T80 had the highest gas production at 72 hours,which was significantly higher than all other groups except for Group T100(P＜0.05).As the proportion of peanut straw increased,the concentration of NH3-N,total volatile fatty acids,propionic acid,valeric acid,isovaleric acid,and isobutyric acid in the culture fluid of all groups showed an increasing and then decreasing trend.The multiple combination effect(MFAEI)of Group T80 was superior to other combinations.The study indicates that different ratios of fermented straw and peanut straw combinations can produce positive synergistic effects.Among them,the combination of fermented straw to peanut straw at a ratio of 20∶80 exhibits a better synergistic effect,which can improve the utilization rate of roughage by the Hu sheep.
Hu sheepcombination effectfermented rice strawpeanut strawin vitro fermentation
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