Fermentation quality and content of poisonous substances in Sophora alopecuroides and corn straw mixed silage

Sophora alopecuroides and corn straw were mixed and silaged at radio of 10∶0, 8∶2, 6∶4, 4∶6, 2∶8 and 0∶10, respectively. The nutrition composition, fermentation quality and alkaloid content were measured after 30, 45 and 60 d ensilage, the aim of this study was to seek optimal mixed silage radio and ensiling days of S.alopecuroides and corn straw, improve the fermentation quality and nutrition composition, and reduce the content of alkaloid. The result showed that with the proportion of S.alopecuroides increasing, pH, ammonia/total nitrogen and crude protein would increase, while the lactic acid, neutral detergent fiber and acid detergent fiber has a descending trend, the alkaloid content of all mixed silage was significantly lower (P0.05) than raw material of S.alopecuroides. The mixed silage with S.alopecuroides and corn straw 2∶8 was best, the pH value was reduced to 3.95~4.01(4.2), the content of crude protein was 52.98%~64.69% higher than that of single corn straw silage, the alkaloid content was 65.63%~66.41% lower than raw material of S.alopecuroides. Ensiling days had no significant effect on the fermentation quality and content of alkaloid.