Determining appropriate crude protein levels in the ration for reproductive Co and Meo pigs
For the purpose of identifying suitable protein level for Co and Meo in gilts, gestation and farrowing periods, a study was implemented at the Research and Development Institute - Hue University of Agriculture and Forestry (for Co pig) and Nghe An Breeding Center (for Meo pig) from 2017 to 2018. Experiment 1 was conducted on 36 Co pigs and 36 Meo pigs, weight of 20±1.0 kg/head (150 days of age). In each breed, pigs are randomly divided into 3 groups which have crude protein level of 12.0%, 13.0% and 14.0% respectively, and the same ME levels of 2800 Kcal/kg. Experiment 2 was conducted on 30 Co and 30 Meo pigs during pregnancy. In each breed, the pregnant sows were randomly divided into 3 groups which have protein levels of 13.5%, 14.5% and 15.5% respectively, and the same ME levels of 2950 Kcal/kg. Experiment 3 was conducted on 30 farrowing Co sows and 30 farrowing Meo sows. In each breed, they were randomly divided into 3 groups that have the following protein level of 15.0%, 16.0% and 17.0% and the same ME level of 3000 Kcal/kg. Dietary nutrient ratio were analyzed before and after preparation. The results show that, the most suitable protein level for gilts from 20 kg to mating stage is 13.0%; 14.5% for pregnant sows, and 16.0% for farrowing sows.
