Evaluation of titanium dioxide as an inert marker for estimating faecal excretion in grazing sheep
Evaluation of titanium dioxide as an inert marker for estimating faecal excretion in grazing sheep
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DOI：
10.1016/j.anifeedsci.2009.04.010
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发表时间：
2009-08-06
影响因子：
3.2
通讯作者：
Susenbeth, A.
中科院分区：
文献类型：
--
作者：
Glindemann, T.;Tas, B. M.;Susenbeth, A.
放牧反刍动物采食量是评价放牧制度的重要信息。由于无法直接测量牧草的摄取量，因此通常通过测量粪便排泄量和摄入牧草的消化率来估计。本研究的目的是评估外部惰性标记物二氧化钛（TiO2）在估计粪便排泄中的作用。在中华人民共和国内蒙古进行了马厩饲养和放牧实验，以测定粪便中TiO2的回收率、初次给药后达到TiO2摄入和排泄平衡的时间、标记给药频率和时间以及抓取取样对TiO2排泄模式的影响，并评价粪便排泄预测的准确性。各实验加样回收率（n = 7）的总平均值为1.04 （sd = 0.05，范围=0.96 ~ 1.09）。然而，在隔间饲养实验中，粪便中TiO2的回收率较高(P
Herbage intake of grazing ruminants is a crucial information for evaluating grazing systems. Since direct measurement of herbage intake is impossible, it is often estimated based on measurement of faecal excretion and digestibility of ingested herbage. The aim of this study was to evaluate the external inert marker titanium dioxide (TiO2) for estimating faecal excretion. Stall feeding and grazing experiments were conducted in Inner Mongolia, People's Republic of China, to determine faecal recovery of TiO2, time to reach equilibrium of intake and excretion of TiO2 after initial administration, the effects of frequency and time of marker administration and of grab sampling on excretion pattern of TiO2, and to evaluate prediction accuracy of faecal excretion. The overall mean of the recoveries in the different experiments (n = 7) amounted to 1.04 (S.D. = 0.05; range=0.96-1.09). However, in the stall feeding experiments, faecal recovery of TiO2 was higher (P