草业学报2025，Vol.34Issue(5)：171-188,18.DOI:10.11686/cyxb2024238
巨菌草对育肥从江香猪生长性能及肠道健康的影响
Effects of Pennisetum giganteum on the growth performance and intestinal health of finishing Congjiang Xiang pigs
摘要
Abstract
The aim of this study was to determine the effects of dietary supplementation with Pennisetum giganteum on the growth performance and intestinal health of finishing Congjiang Xiang pigs.Thirty 6-month-old healthy Congjiang Xiang pigs of similar weight were selected and randomly divided into three groups(five replicates per group,two pigs per replicate).The control group was fed with a basal diet,and experimental groups Ⅰ and Ⅱ were fed with the basal diet with 10%and 20%(w/w)replaced with fresh P.giganteum.The experimental period was 90 days.The growth performance,intestinal development,and the structures of the intestinal mechanical barrier and cecal flora were analyzed,and the economic benefits were estimated.The main results were as follows:1)Growth performance:Compared with the control group,groups Ⅰ and Ⅱ showed no significant differences in growth performance or carcass traits(P>0.05).When the cost of P.giganteum was not considered,groups Ⅰ and Ⅱ had lower weight gain costs(reduced by 8.73%and 11.59%,respectively)than that of the control group.When the cost of P.giganteum was calculated according to the market price of 0.35 CNY·kg-1,group Ⅰ still had a lower weight gain cost(2.78%lower)than that of the control,but the weight gain cost of experiment group Ⅱ was increased by 1.35%.2)Intestinal development:Compared with the control group,groups Ⅰ and Ⅱ had significantly higher relative weight of the stomach(P<0.05),and a trend of higher relative weight of the small intestine(P=0.092).Compared with the control group,group Ⅰ showed significantly decreased ileal crypt depth(P<0.05),and significantly increased ileal height/crypt depth(V/C)and transcript levels of GLP-2 in the jejunum and IGF-1R in the ileum(P<0.05).Compared with the control group,group Ⅱ showed significantly increased ileal villus height,V/C,and gene transcript level of jejunal GLP-2(P<0.05).3)Intestinal immunity and mechanical barriers:Compared with the control group,groups Ⅰ and Ⅱ showed significantly decreased ileal IFN-γ content,and group Ⅱ showed significantly increased jejunal TGF-β content(P<0.05).Comparing gene transcript levels with those in the control,groups Ⅰ and Ⅱ showed significantly increased transcript levels of ZO-1 in the ileum(P<0.05),and group Ⅱ showed significantly increased transcript levels of Occludin in the jejunum(P<0.05).4)Cecal microbes:Shannon index was significantly higher in both experimental groups than in the control(P<0.05).The relative abundance of Streptococcus was significantly lower in both experimental groups than in the control(P<0.05).The experimental groups showed trends of increased abundance of unclassified_f__Lachnospiraceae(P=0.065)and decreased abundance of Spirochaetota(P=0.085)and Treponema(P=0.085).In conclusion,replacing part of the basal diet with P.giganteum had no significant effect on the growth performance or carcass traits of finishing Congjiang Xiang pigs,but it improved the economic efficiency,promoted gastrointestinal tract development,and enhanced intestinal barrier function,which were conducive to intestinal health.These results show that 20%of the basal diet can be replaced with P.giganteum if its cost is not considered,and 10%of the basal diet can be replaced with P.giganteum if it is costed at the market price of 0.35 CNY·kg-1.These findings provide scientific data for assessing the application of P.giganteum in pig production.关键词
巨菌草/育肥从江香猪/生长性能/盲肠菌群/肠道健康Key words
Pennisetum giganteum/finishing Congjiang Xiang pigs/growth performance/cecal microflora/intestinal health引用本文复制引用
张敏,金灵,杨锐,黄逸州,林芷昕,郑贤跃,刘庆华,高玉云,林冬梅,林占熺..巨菌草对育肥从江香猪生长性能及肠道健康的影响[J].草业学报,2025,34(5):171-188,18.基金项目
国家重点研发计划项目(2023YFD1600500),福建省科技厅农业引导性(重点)项目(2023N0008),福建省自然科学基金项目(2022J01587),中央引导地方科技发展资金定向项目(2022L3085)和菌草及菌草食药用菌种质创新(KKy22001XA)资助. （2023YFD1600500）
