Effects of Fermentation Temperature on Compound Microbial Silage Quality
The changes of fermentation temperature during the compound microbial silage of sweet sorghum and the effects of fermentation temperature on silage quality were investigated in this study.Three kinds of complex probiotics were as inoculum added to sweet sorghum residue to silage in the top,middle and low part of the fermentation tank.The temperature during silage process was measured,the changes of temperature and its effects on silage quality were studied.The results showed that the temperature variations between day and night,which was five degrees,had significant difference(P＜0.05).The temperature of the top part,middle part and low part during the stationary fermentation phase was 37.85,36.60,35.44 degrees centigrade,respectively.The crude protein (CP) in the middle part was 5.09％,which was higher than those in the top part (3.71％) and in the low part (3.76％) (P＜0.05).The contents of lactic acid in the middle part was higher by 12.92％ and 10.18％ than those in the top and low part respectively (P＜0.05),the contents of propionic acid had improved by 38.07％,29.68％ respectively compared with the results in the top and low part.The pH value and the contents of acetic acid had no significant difference.In conclusion,the fermentation temperature of the middle part pit is conducive to improve the quality of sweet sorghum silage by compound microbial,for it increased significantly lactic acid and propionic acid of silage.
国家科技期刊平台
NSTL
万方数据
维普
