Effects of adding corn straw,alfalfa,and oat in different proportions on silage quality
The aim of this experiment was to study the effects of the addition ratio of corn straw,alfalfa and oat on the silage quality.Corn straw,alfalfa and oat were mixed in different proportions,and the nutritional quality and fermentation quality of the silage after fermentation for 90 days were detected.The mixing effect of alfalfa,corn straw and oat was analyzed based on principal component analysis.The results showed that the addition of alfalfa significantly affected the crude protein(CP)content of silage feed composed of corn straw and alfalfa,oat and alfalfa.At the same time,the maximum CP content was 15.39%and 16.37%when alfalfa was added to 50%.In the silage composed of corn straw,alfalfa and oat,the overall principal component score of the silage was higher when the proportion of corn straw added was 50%,the highest score was 9.868,followed by 9.736 and 9.559.The dry matter(DM),CP,neutral detergent fiber(NDF),acid detergent fiber(ADF),and soluble carbohydrates(WSC)of the highest score group were 31.74%,18.64%,35.85%,26.44%,4.52%,and 4.52%,respectively.The pH value,lactic acid(LA),acetic acid(AA),propionic acid(PA),butyric acid(BA),ammonia nitrogen/total nitrogen(NH3-N/TN)were 4.33,10.96%,7.33%,3.87%,1.61%,and 14.39%,respectively.The results show that the optimum ratio of corn straw to alfalfa silage is 6∶4,that of oat to alfalfa silage is 6∶4,that of corn straw to oat silage is 7∶3,and that of corn straw,alfalfa to oat silage is 5∶4∶1.
国家科技期刊平台
NSTL
万方数据
