Effect of the Ensiled Taro with Rice Wine by Product or Fish Meal Fed Basal Diet of Rice Bran on Digestibility and Nitrogen Retention of Growing Pigs

Eight castrated male crossbred pigs (Large White x Local breed) of average live weight 25 kg were given four diets in a double 4*4 Latin square arrangement. The experiment included 4 periods, each of 12 days, 7 days for adaptation and 5 days for collection of feces and urine. The pigs were vaccinated against salmonellosis, pasteurellosis and hog cholera. The experiment was carried out from 08th September 2020 to 20th November 2020, at the research station of Svay Rieng University (SRU), located in Svay Rieng Province, Cambodia. The total intakes of DM, CP and OM were higher in the treatments that contained rice wine by product (RW20) and rice wine by product plus fish meal (RW20FM10). As the percentages of CF, NDF and ADF were lower intakes of these fractions in the treatment without used the rice wine by product (RW0) or used rice by product plus fish meal (FM10). There were no consistent differences in apparent digestibility of DM, OM, CP and ADF, except CF and NDF among the diets. The values were relatively high for all the treatments contained rice wine by product while the basal diet of rice brain was mixed but except the values of CF and NDF. The apparent digestibility of DM, OM and CP increased when the diets were mixed with rice wine by product. The values for N retention, expressed as g/day or as a percentage of N intake or N digested, were highest for the diet with mixed rice wine by product with a tendency for the diet without mixed rice wine by product (FM10) to be also better than the diets without rice wine by product or fish meal (RW0). When the data for N retention were corrected for differences in N intake therefore the differences in N retention were more pronounced in favor of the diets containing rice wine by product (RW20 and RW20FM10) or without rice wine by product (FM10). The conclusion was the supplement of a mixture of the ensiled taro with rice wine by product in the diets contained RW20 and RW20FM10, were higher apparent digestibility of DM, CP, OM and CF, and higher N retention, than when supplement was only ensiled taro without rice wine by product (RW0) or fish meal (FM10), mixed with a basal diet of rice brain.