摘要
本试验旨在研究不同纤维素来源饲料添加硝酸钙[Ca(NO_(3))_(2)]对绵羊瘤胃体外发酵的影响。采用双因素析因试验设计,选择2种不同纤维素来源饲料,分别为苜蓿干草(AH组)和甜菜粕(BP组)。结果表明:添加3%Ca(NO_(3))_(2)显著降低了CH_(4)/DM和CH_(4)/OM产量(P<0.05),AH组、BP组较对照甲烷产量分别降低了0.71%、2.32%,CH 4/OM分别降低了1.04%、3.59%;乙酸摩尔比较对照组分别增加了17.11%、5.20%(P<0.05),丁酸比例分别降低了7.10%、11.96%(P<0.05);添加Ca(NO_(3))_(2)后显著增加了饲料原料48 h体外发酵底物粗蛋白质体外降解率(IVCPD)(P<0.05),AH+CN组和BP+CN组分别增加了4.15%、10.42%。综上所述,非饲草饲料原料添加3%Ca(NO_(3))_(2)能够更有效降低瘤胃发酵过程中CH 4产量,增加饲料原料48 h体外发酵底物IVCPD。
The purpose of this study was to evaluate the effects of different fiber sources of diets supplemented with Ca(NO_(3))2 of sheep in vitro.The experiment used two-factor factorial design and selected two different fiber sources,which were alfalfa hay(AH group)and beet pellet(BP group),respectively.Supplemented Ca(NO_(3))_(2) was significantly reduced the CH_(4)/DM and CH_(4)/OM contents(P<0.05).Compared with the control group,the methane yield of AH group and BP group decreased by 0.71% and 2.32%,and CH_(4)/OM decreased by 1.04% and 3.59%,molar acetic acid increased by 17.11% and 5.20%(P<0.05),and the proportion of butyric acid decreased by 7.10% and 11.96%(P<0.05),and which had higher in vitro degradation rate of crude protein(IVCPD,P<0.05)in vitro at 48 h,AH+CN group and BP+CN group increased by 4.15% and 10.42%,respectively.In conclusion,adding 3%Ca(NO_(3))_(2) to non-forage feedstuff could more effectively reduce CH_(4) production in vitro and increase IVCPD substrate fermented by feed raw materials for 48 h in vitro.
作者
杜妮妮
文明星
刘婷
王菊霞
DU Nini;WEN Mingxing;LIU Ting;WANG Juxia(Animal Husbandry and Veterinary Bureau of Dingxi City,Dingxi,Gansu Province 743000,China;College of Animal Science and Technology,Sichuan Agricultural University,Institute of Animal Genetics and Breeding,Chengdu,Sichuan Province 611130,China;College of Animal Science and Technology,Gansu Agricultural University,Lanzhou,Gansu Province 730070,China)
出处
《中国饲料》
北大核心
2023年第17期35-40,共6页
China Feed
关键词
纤维素来源
硝酸盐
甲烷排放量
体外发酵
fiber source
nitrate
methane emissions
in vitro fermentation
