Feeding Effect of Growing-Finishing Pigs under Fine Division of Feeding Stages

In order to study the feeding effect of fine division of feeding stages on the growing-finishing pigs, 96 healthy Duroc × Landrace × Yorkshire hybrid commercial pigs with similar age in days, size, and body weight about 15 kg, half boars and half sows, randomly divided into 3 treatments (each treatment repeated 4 times, and each repetition 8 pigs). According to the body weight division standard, three stages, four stages, and five stages of feeding were adopted separately. The daily ration of with different nutrition levels was used, body weight and feed consumption were measured, and effects of different feeding methods on body weight increase, feed utilization, and economic benefits of growing-finishing pigs. The results showed that compared with the three-stage feeding, the body weight of five-stage and four-stage feeding increased by 4.18% (P < 0.01) and 2.41% (P < 0.05), respectively, and the body weight of five-stage feeding increased by 1.74% (P < 0.05) compared with that of four-stage feeding; the daily feed consumption of five-stage and four-stage feeding increased 3.10% (P < 0.01) and 1.70% (P < 0.01), respectively, and the daily feed consumption of five-stage feeding was 1.37% higher than that of four-stage feeding. The feed cost of five-stage feeding and four-stage feeding increased 3.32% (P < 0.01) and 1.61% (P < 0.05) separately, and the feed cost of five-stage feeding was 1.69% higher than that of four-stage feeding (P < 0.01). The income from average body weight increase of five-stage and four-stage feeding increased by 5.47% (P < 0.01) and 3.59% (P < 0.01) respectively, and the benefit of average body weight increase of five-stage feeding was 1.81% higher than that of four-stage feeding (P > 0.05). The crude protein consumption from average body weight increase of five-stage and four-stage feeding decreased by 2.28% (P < 0.01) and 1.68% (P < 0.01), respectively; the crude protein consumption from average body weight increase of five-stage feeding was 0.67% lower than that of four-stage feeding; the feed conversion ratio of five-stage feeding, four-stage feeding, and three-stage feeding was 2.92, 2.93, and 2.95 respectively. The results showed that compared with the three-stage feeding, the four-stage and five-stage feeding could significantly increase the body weight of the growing-finishing pigs, improve the feed utilization level and improve the economic benefits, and the effect of five-stage feeding was better than the four-stage feeding.