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- W2383037078 abstract "This study was conducted to study the effects of different dietary protein sources on energy and nitrogen metabolism and methane emission of beef cattle. Three healthy Xuanhan Yellow cattle with similar body weight fitted with permanent ruminal cannulas were used in a 3×3 complete Latin square design. Soybean meal,rapeseed meal and cottonseed meal were used as protein sources to prepare experimental diets; the experiment was consisted of 3 periods with 20 days in each period( pre-experimental period: 10 days; digestion experiment:3 days; breath metabolism experiment: 7 days). The results showed as follows: 1) total volatile fatty acid concentration in experimental groups was not significantly different( P 0. 05); acetate concentration in soybean meal and rapeseed meal groups was significantly higher than that in cottonseed meal group( P0.05); propionate concentration in rapeseed meal and cottonseed meal groups was significantly higher than that in soybean meal group( P0.05); butyrate concentration in three groups was significantly different( P0.05); acetate /propionate in three groups was significantly different( P0.05),and the order was soybean meal grouprapeseed meal groupcottonseed meal group; NH3-N content in three groups was significantly different( P0.05),and the order was soybean meal grouprapeseed meal group cottonseed meal group. 2) Nitrogen intake,fecal nitrogen,digestible nitrogen and nitrogen digestibility in three groups were not significant different( P0.05); urinary nitrogen in soybean meal and cottonseed meal groups was significantly higher than that in rapeseed meal group( P0.05),and nitrogen deposition and nitrogen utilization in rapeseed meal group were significantly higher than those in soybean meal and cottonseed meal groups( P0.05). 3) Urinary energy in three groups was significantly different( P0.05),and the order was soybean meal groupcottonseed group mealrapeseed meal group; net energy for gain( NEg),NEg /gross energy,NEg /digestive energy and NEg /metabolizable energy in soybean meal group were significantly lower than those in rapeseed meal and cottonseed meal groups( P 0. 05). 4)Methane emission,methane energy,methane energy /gross energy and methane emission of per kg of dry matter intake were significant different( P0.05),and the order was soybean meal grouprapeseed meal groupcottonseed group meal. It is concluded that nitrogen biological value of the diet with rapeseed meal as the protein source is the highest,that with soybean meal is lower,and that with cottonseed meal is the lowest; NEg of the diet with cottonseed meal as the protein source is the highest,that with rapeseed meal is lower,and that with soybean meal is the lowest; methane emission of the diet with soybean meal as protein source is the highest,that with rapeseed meal is lower,and that with cottonseed meal is the lowest." @default.
- W2383037078 created "2016-06-24" @default.
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- W2383037078 date "2014-01-01" @default.
- W2383037078 modified "2023-09-24" @default.
- W2383037078 title "Effects of Different Dietary Protein Sources on Energy and Nitrogen Metabolism and Methane Emission of Beef Cattle" @default.
- W2383037078 hasPublicationYear "2014" @default.
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