Effects of straw supplemental level on nutrient quality,fermentation quality and microbial quantity of cabbage waste
The experiment was conducted to investigate the effects of straw supplemental level on nutritional quality,fermentation quality and microbial quantity of cabbage waste.Cabbage waste and corn stalk are cut into 2.0*2.0 cm in size and 1.0～1.5 cm in length respectively.In the experiment,5 treatments were set up,and the cabbage waste was replaced by 30%,35%,40%,45% and 50% of corn stalk in treatments 1～5,respectively,and were mixed as cabbage waste and corn stalk.There were 6 replicates per treatment and 1 replicate per silage vacuum bag.Samples were taken 9 weeks after silage for subsequent index determination.The results showed as follows:compared with 30% corn stalk addition,the dry matter content of cabbage waste was very significantly increased with 40%,45% and 50% corn stalk supplementation(P＜0.01).The crude protein content was the highest when 45% corn stalk was substituted for cabbage waste(P＜0.05),and the soluble carbohydrate content was the lowest(P＜0.05).When 45% corn stalk was substituted for cabbage waste,pH,the contents of ammonia nitrogen and butyric acid were the lowest in all groups,and the contents of lactic acid and acetic acid were the highest in all groups(P＜0.05).When 45% corn stalk was substituted for cabbage waste,the number of lactic acid bacteria was the highest in all groups,and the number of yeast and aerobic bacteria was the lowest in all groups(P＜0.05).In conclusion,replacing cabbage waste with 45% corn stalk can significantly improve the nutritional quality and fermentation quality of cabbage waste,and improve the microbial structure.
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万方数据
