Breeding method for Laiwu pork pigs under large-scale feeding and management conditions

The invention relates to the field of livestock breeding and particularly discloses a breeding method for Laiwu pork pigs under large-scale feeding and management conditions. The method comprises the steps that a fattening earlier-stage feed and fermented bran are fed when each pig is 30-50 g, wherein the feeding amount is 3.5-4% of the weight of each pig every day, and each time of fermented bran adding amount accounts for 20-40% of the feeding amount; a fattening later-stage feed and fermented bran are fed when each pig is 50-70 g, wherein the feeding amount is 3-3.5% of the weight of each pig every day, and each time of fermented bran adding amount accounts for 15-30% of the feeding amount; a fattening later-stage feed and fermented bran are fed from reaching time of 70 g of each pig to slaughtering, wherein the feeding amount is 2.5-3.0% of the weight of each pork pig every day, and each time of fermented bran adding amount accounts for 30-40% of the feeding amount; three times of feeding are performed at each stage. The nutrient needs of the Laiwu pork pigs are met by adding different proportions of fermented bran in feeds at different stages and controlling the types of the feeds and usage amount, the digestion and absorption rate of the pigs is improved, and healthy growth of the pigs is ensured.