Effect of dioscorea opposite waste on growth performance, blood parameters, rumen fermentation and rumen bacterial community in weaned lambs  

作　　者：GUO Yun-xia YANG Ruo-chen DUAN Chun-hui WANG Yong HAO Qing-hong JI Shou-kun YAN Hui ZHANG Ying-jie LIU Yue-qin 

机构地区：[1]College of Animal Science and Technology,Hebei Agricultural University,Baoding 071000,P.R.China [2]College of Life Sciences,Hebei Agricultural University,Baoding 071000,P.R.China [3]Engineering Research Center for Utilization of Agricultural Waste Resources,Baoding 071001,P.R.China

出　　处：《Journal of Integrative Agriculture》2023年第6期1833-1846,共14页农业科学学报（英文版）

基　　金：supported by the Key R&D Project of Hebei Province of China (21322907D and 21322910D);the Natural Science Foundation of Hebei Province, China (C2022204174);the China Agriculture Research System (CARS-38 and CARS-39-23)。

摘　　要：This study investigated the effects of dioscorea opposite waste(DOW) on the growth performance, blood parameters, rumen fermentation and rumen microbiota of weaned lambs. Sixty healthy weaned Small-Tailed Han lambs(male,(22.68±2.56) kg initially) were used as the experimental animals. Four levels of concentrate: 0(control, CON), 10%(DOW1), 15%(DOW2) and 20%(DOW3), were replaced with DOW in the basal diet as experimental treatments. The results showed that lambs fed the DOW2 diet had a higher(P<0.05) dry matter intake(DMI) than the other groups. There was no significant difference(P>0.05) among DOW groups in average daily weight gain(ADG), and replacing concentrate with DOW linearly or quadratically increased(P<0.05) the ADG, while lambs fed the DOW2 diet showed greater(P<0.05) ADG than the CON group. The relative plasma concentration of growth hormone(GH), insulin like growth factor-1(IGF-1) and insulin were affected by DOW, replacing concentrate with DOW linearly or quadratically(P<0.05) enhanced the plasma concentration of GH, IGF-1 and insulin, which was significantly higher(P<0.05) in the DOW2 group than in the CON, DOW1 and DOW3 groups. In addition, the DOW treatment showed a lower(P<0.05) concentration of blood urea nitrogen(BUN) than the CON group. Replacing concentrate with DOW quadratically decreased(P<0.05) the ruminal ammonia nitrogen(NH3-N) and increased(P<0.05) the total of volatile fatty acids(TVFAs) at 0 and 4 h after feeding as well as linearly decreased(P<0.05) the NH3-N at 8 h after feeding. Replacing concentrate with DOW linearly decreased(P<0.05) the propionate and increased the aceate before feeding, and linearly decreased(P<0.05) propionate and quadratically increased(P<0.05) the aceate at 4 and 8 h after feeding. Lambs fed the DOW2 diet increased the phylum Firmicutes and genera Succiniclasticum and Ruminococcus_1 groups, whereas decreased(P<0.05) the relative abundance of phylum Deferribacteres and genera intestinimonas and Ruminiclostridium. In summary, replacing the concentrate with 15%

关 键 词：LAMB dioscorea opposite waste growth performance blood parameters rumen fermentation rumen microflora 

分 类 号：S826[农业科学—畜牧学]