Nutritional quality of silage made with different ratios of forage rape and corn stalks

In this study, feed rapeseed harvested in the blooming stage and the corn stalk were used as raw materials and mixed-storage at different proportions to find their optimal ratio by analyzing nutrient quality. The results indicate that feed rape cannot be individually prepared for silage. After mixed-storage processing, the content of CP, EE, ADF, NDF, and Ash ranged between those of feed rapeseed and corn stalks for single storage. Nutritional quality was significantly improved and achieved the purpose of improving silage quality. The content of CP and EE in treatment Ⅲ (7∶3 rape-corn stalk ratio) was significantly higher than that in treatment Ⅳ (3∶7 rape-corn stalk ratio), while the content of ADF and NDF was significantly lower than that of treatment Ⅱ (0∶10 rape-corn stalk ratio), and treatment IV (P<0.05). The pH value of mixed storage was significantly lower than that of individual corn stalk and rape storage (P<0.05), the lowest pH value was observed in treatment Ⅲ. The score of V-Score in treatment Ⅲ (7∶3 rape-corn stalk ratio) was significantly higher than that in treatment Ⅳ (3∶7 rape-corn stalk ratio). By comprehensive comparison, we conclude that treatment Ⅲ with 7∶3 rape-corn stalk ratio should be the preferable mixing ratio.