The Changes of Nutrient Composition and In Vitro Evaluation on Gamma Irradiated Sweet Sorghum Bagasse

The changes of Nutrient Composition and In Vitro Evaluation on Gamma Irradiated Sweet Sorghum Bagasse. In vitro rumen fermentation study was done to evaluate the effects of gamma irradiation on nutrient compound changes and rumen fermentation product of sweet sorghum bagasse (SSB). The level doses 0, 50, 100 and 150 kGy from cobalt-60 gamma rays irradiator was used to treate sweet sorghum bagasse (SSB). Variables measured were nutrient values, gas production, methane (CH4) production, total volatile fatty acid (TVFA), ammonia (NH3), in vitro dry matter digestibility (IVDMD) and in vitro organic matter digestibility (IVOMD) after 72 h in-vitro incubation times. Complete randomized design (CRD) (four treatments and four replications) was used to analyze data. The results show that gamma irradiation doses 50, 100 and 150 kGy was able to reduce neutral detergent fibre (NDF) (2.15; 3.29 and 5.44% respectively) and acid detergent fibre (ADF) (3.29; 4.58 and 4.58% respectively) significantly different (P<0.05). Gamma irradiation was capable of increasing total volatile fatty acid (TVFA), IVDMD and IVOMD (P<0.05). Doses 100 and 150 kGy also increase protozoa population and CH4 production significantly (P<0.05). Gamma irradiation could improve in vitro rumen performance represented in rumen fermentation products.

Keyword : Gamma irradiation, In vitro fermentation, Nutrient composition, Sweet sorghum bagasse