Title: Study on in vitro fermentation characteristics of alfalfa hay mixed with straw and their combined utilization
Abstract:An experiment was conducted to investigate in vitro gas production characteristics of mixed forages.The mixed forages investigated in this experiment were alfalfa hay mixed with corns straw,alfalfa ha...An experiment was conducted to investigate in vitro gas production characteristics of mixed forages.The mixed forages investigated in this experiment were alfalfa hay mixed with corns straw,alfalfa hay mixed with wheat straw,and corns straw mixed with wheat straw,all mixtures replicated at proportions of 0∶100,25∶75,50∶50,75∶25,and 100∶0.The results show that the maximum theoretic gas production,rate of gas production and lag time of gas production present different changing patterns,respectively,with the variation of mixed proportion.The obvious positive associative effects are noted when the mixture of alfalfa hay was mixed with corn stalk with the proportion of 50∶50 or alfalfa hay was mixed with wheat straw with the proportion of 75∶25.Correlation analyses indicated that cumulative gas production at 48 h was positively related to the content of CP(P0.05) and NDS,and negatively related to the content of NDF,ADF,HC and the ratio of NDS to CP.The theoretical maximum gas production CP and NDS,and negatively related to the content of NDF,ADF,HC and the ratio of NDS to CP(P0.01).The rate of gas production was the content of CP(P0.01),HC(P0.01),NDS(P0.01),and negatively related to the content of NDF(P0.01),ADF(P0.01) and the ratio of NDS to CP(P0.05).The lag times were positively related to the ratio of NDS to CP(P0.05),but had little correlation with the other major nutritional components of forage grass and feed.It is therefore suggested that the in vitro gas production characteristics depend upon the balance of non-structural carbohydrate and crude protein,and adding pastures rich in fermentable carbohydrate and/or digestible protein into low quality forage is essential and necessary to improve utilization efficiency of crude forage.Read More
Publication Year: 2008
Publication Date: 2008-01-01
Language: en
Type: article
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Cited By Count: 2
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