本文選題：西藏 + 牧草　； 參考：《動物營養(yǎng)學報》2016年06期

【摘要】：本文旨在利用體外產(chǎn)氣法評定西藏地區(qū)不同牧草營養(yǎng)價值。選取西藏地區(qū)5種常見牧草,通過單因素試驗設計,利用體外產(chǎn)氣法評定5種牧草體外發(fā)酵48 h累積產(chǎn)氣量、理論最大產(chǎn)氣量(V_f)、初始產(chǎn)氣速率(FRD_0)、達到最大產(chǎn)氣量一半時所需時間(t_(0.5))、體外干物質(zhì)消失率(IVDMD)、體外中性洗滌纖維消失率(IVNDFD)、p H、氨態(tài)氮(NH_3-N)濃度以及揮發(fā)性脂肪酸(VFA)產(chǎn)量。結(jié)果表明,體外發(fā)酵48 h后,葦狀羊茅體外48 h累積產(chǎn)氣量、V_f、FRD_0、IVDMD及甲烷(CH_4)、乙酸、丙酸、丁酸和總VFA產(chǎn)量均顯著高于其他4種牧草(P0.05),但其體外發(fā)酵p H及乙酸/丙酸顯著低于其他4種牧草(P0.05);紫花苜蓿體外NH_3-N濃度最高,顯著高于其他4種牧草(P0.05)。綜上分析,葦狀羊茅體外發(fā)酵效果最佳,與其他試驗牧草相比,更容易被瘤胃微生物降解利用。
[Abstract]:The aim of this paper is to evaluate the nutritional value of different forages in Tibet by in vitro gas production. Five common forage grasses in Tibet were selected and the accumulative gas production of 5 species of forage grass was evaluated by the method of gas production in vitro for 48 h by single factor experimental design. The theoretical maximum gas production rate and initial gas production rate are: FRD0, the time required to reach half of the maximum gas production, the rate of disappearance of dry matter in vitro, the vanishing rate of IVNDFDN, the concentration of NH _ 3-N _ 3-NFAs and the production of volatile fatty acid (VFAs). The results showed that after 48 h fermentation in vitro, the accumulative gas production of Reed fescue in vitro was VfD / FRDMD and Ch _ 4, acetic acid, propionic acid, Ch _ 4, acetic acid and propionic acid. The yield of butyric acid and total VFA was significantly higher than that of the other four forages, but the in vitro ferment pH and acetic acid / propionic acid were significantly lower than those of the other four forages, and the concentration of NH_3-N in vitro was the highest in alfalfa, which was significantly higher than that of the other four forages. The results showed that fescue had the best fermentation effect in vitro and was more easily degraded by rumen than other experimental forages.
【作者單位】： 西藏自治區(qū)農(nóng)牧科學院畜牧獸醫(yī)研究所;中國科學院亞熱帶農(nóng)業(yè)生態(tài)研究所亞熱帶農(nóng)業(yè)生態(tài)過程重點實驗室湖南省畜禽健康養(yǎng)殖工程技術(shù)中心農(nóng)業(yè)部中南動物營養(yǎng)與飼料科學觀測試驗站;湖南畜禽安全生產(chǎn)協(xié)同創(chuàng)新中心;
【基金】：國家自然科學基金項目(31372342) 中國科學院科技服務網(wǎng)絡計劃(KFJ-EW-STS-071)
【分類號】：S816.6

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