The Evaluation of Nutritional Value of Several Subtrib sp by in vitro a Gas Production Method
3 Hainan black goats with permanent rumen fistula were chosen to assess nutritional value of six species of Subtrib.Desmodiinae with in vitro a gas production method.The results showed that there were significant differences(p0.05)between the 72 h gas production amount(by 0.2g sample as fermentation substrate) and dry matter digestibility among different species.D.strigillosum had the highest gas production amount and dry matter digestibility(24.5 mL,52.5%,separately),while D.dunnii had the lowest gas production amount(16.4 mL) and D.triangulare had the lowest dry matter digestibility(36.9%).Gas production amount and dry matter digestibility in plant varied in different growth period and with higher nutritional value in pod bearing period.Correlation analysis showed that there were positive correlations between the gas production amount and dry matter digestibility,but there were no positive correlations among the content of tannins,gas production amount,and dry matter digestibility,which meant no obvious influence of tannins on the nutritional value of Desmodium sp.