摘要
测定表明,风干的啤酒花剪花后茎叶中粗蛋白质的含量为18.44％,高于蚕豆茎叶粗蛋白质的含量。用装有瘤胃瘘管的两只绵羊,在饲喂蚕豆茎叶和饲喂啤酒花茎叶的不同条件下,观测了瘤胃内pH、氨氮和蛋白质含量的白天动态变化。结果表明,无论在饲喂蚕豆茎叶期(Ⅰ期),还是在饲喂啤酒花茎叶期(Ⅱ期),绵羊瘤胃液中pH均呈碱性,在中午14时pH值最低。Ⅱ期的pH值低于Ⅰ期。瘤胃液中氨氮的含量Ⅱ期高于Ⅰ期;而蛋白质的含量Ⅰ期高于Ⅱ期。可以认为啤酒花剪花后茎叶是反刍动物的一种较好的越冬粗饲料。
The coarse protein in air-dried stems and leaves of hops, of which the flower had been cut off, was 18.44% which was higher than that of the broad beans.The pH, NH_3-N and protein were observed in the rumens of two sheep which were installed with rumen tubes and fed on stems and leaves of broad beans or hops.The results showed that the pH of the rumen liquid of the sheep, either fed on stems and leaves of broad beans (Ⅰ-stage) or hops (Ⅱ-stage), all presented alkaline reaction and the lowest reaction was at 2:00p.m.The pH of Ⅱ-stage was lower than that of Ⅰ-stage.The content of NH_3-N in the rumen lipuid was higher in Ⅰ-stage than in Ⅱ-stage, but the content of protein was higher in Ⅱ-stage than in Ⅰ-stage.It is considered that the stems and leaves of hops could be used as coarse feed for sheep in winter season.The addition of proper amount of concentrate is recommended if this is used as coarse feed only.
出处
《甘肃农业大学学报》
CAS
CSCD
1992年第4期315-320,共6页
Journal of Gansu Agricultural University
