饲养阶段细划分下生长育肥猪的饲养效果

为研究生长育肥猪饲养阶段细划分的饲养效果,选用96头日龄接近、体型体况相似、体质量15 kg左右的健康"杜×长×大"三元杂交商品猪,公母各半,随机分成3个处理(每个处理4个重复,每个重复8头猪),根据体质量划分标准,分别采用三阶段、四阶段和五阶段饲养,饲喂不同营养水平日粮,并测定体质量和耗料量,分析不同饲养阶段划分对生长育肥猪体增质量、饲料利用情况及经济效益的影响。结果表明,与三阶段饲养相比,五阶段和四阶段饲养头均体增质量分别提高4.18%(P0.05)和2.41%(P0.05),五阶段较四阶段头均体增质量提高1.74%(P0.05);五阶段和四阶段饲养头均耗料量分别提高3.10%(P0.05)和1.70%(P0.05),五阶段较四阶段头均耗料量高1.37%(P0.05);五阶段和四阶段饲养头均饲料成本分别提高3.32%(P0.05)和1.61(P0.05),五阶段比四阶段提高1.69%(P0.05);五阶段和四阶段饲养头均体增质量效益分别提高5.47%(P0.05)和3.59%(P0.05),五阶段比四阶段提高1.81%(P0.05);五阶段和四阶段饲养头均体增质量粗蛋白消耗量分别降低2.28%(P0.05)和1.68%(P0.05),五阶段比四阶段低0.67%(P0.05)。以上结果表明,与三阶段饲养相比,四阶段和五阶段饲养均能明显提高生长育肥猪的体质量增加幅度、饲料利用水平、经济效益,且五阶段饲养比四阶段饲养效果更佳。

Effects of Multi-phases Feeding on Performance of Growing-finishing Pigs

This study was conducted to evaluate the effects of multi-phases feeding on performance of growing-finishing pigs.Ninety-six crossbred pigs (Duroc × Landrace × Yorkshire,with the similar age and body condition,half males and half females,15 kg of body weight) were randomly allotted to 3 treatments with 4 replications.Three-phases feeding,four-phases feeding and five-phases feeding methods were adopted.The results showed that weight gains of five-phases feeding were increased by 4.18％ (P ＜ 0.05) in contrast to three-phases feeding,feed consumption were increased by 3.10％ (P ＜ 0.05),weight gains of four-phases feeding were increased by 2.41％ (P ＜ 0.05),feed consumption was increased by 1.70％ (P ＜0.05).In contrast to four-phases feeding,weight gains and feed consumption of five-phases feeding were increased by 1.74％ and 1.37％ (P ＜ 0.05),respectively.There were no significant differences of feed-gain ratio among 3 treatments.In contrast to three-phases feeding,feed cost of five-phases feeding was increased by 3.32％ (P ＜ 0.05),benefits of weight gains were increased by 5.47％ (P ＜ 0.05),feed cost of fourphases feeding was increased by 1.61％(P ＜0.05),benefits of weight gains were increased by 3.59％ (P ＜0.05).In contrast to four-phases feeding,feed cost and benefits of weight gains of five-phases feeding were increased by 1.69％(P ＜ 0.05) and 1.81％ (P ＞ 0.05) respectively.In contrast to three-phases feeding,consumption of crude protein(per kilogram of weight gain) of five-phases feeding was decreased by 2.28％ (P ＜ 0.05),four-phases feeding was decreased by 1.68％ (P ＜ 0.05).In contrast to four-phases feeding,consumption of crude protein(per kilogram of weight gain) of five-phases feeding was decreased by 0.67％ (P ＞0.05).The results indicated that four-phases feeding and five-phases feeding could improve performance and breeding benefit of growing-finishing pigs compared with three-phases feeding,five-phases feeding was better than four-phases feeding.