Bath G F, Smith F J, Vorster H J, Cross R H
Department of Theriogenology, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, Republic of South Africa.
J S Afr Vet Assoc. 1992 Sep;63(3):108-12.
In a series of in virtro experiments (n = 64) using the mature flowers or seeds and pappus hairs of Karoo bushes Chrysocoma ciliata, Dimorphotheca cuneata, Eriocephalus ericoides, Gazania krebsiana and Gnidia polycephala, small phytobezoars were formed from material of E. ericoides, G. krebsiana and G. polycephala either alone or in combinations. The ratio of fibre to liquid used was found to be optimal around 1: 7 and milling of material enhanced bezoar formation. Time and pH did not appear to significantly affect the formation of bezoars. Other factors were either standardised or not studied. In a small in vivo trial, 4 groups of one sheep and one goat each were fed 10% of either C. ciliata, E. ericoides, G. polycephala seeds and pappus hairs, or a mixture of all 3, added to a basal diet of milled lucerne fed for up to 31 d. Small phytobezoars were formed in the goats but not the sheep receiving C. ciliata, and G. polycephala material. It was concluded that phytobezoars could form in goats or sheep eating large quantities of mature flowers or seeds of several Karoo bushes.
在一系列体外实验（n = 64）中，使用了卡鲁灌木丛中纤毛金盏花、楔叶异果菊、绵毛银叶菊、小滨菊和多花艾纳香的成熟花朵、种子及冠毛，单独或组合使用绵毛银叶菊、小滨菊和多花艾纳香的材料可形成小型植物粪石。发现纤维与液体的使用比例在1:7左右最为适宜，材料研磨可促进粪石形成。时间和pH值似乎对粪石形成没有显著影响。其他因素要么进行了标准化处理，要么未作研究。在一项小型体内试验中，将4组，每组1只绵羊和1只山羊，分别喂食添加到磨碎的苜蓿基础日粮中的纤毛金盏花、绵毛银叶菊、多花艾纳香种子及冠毛中的10%，或这3种的混合物，持续喂食31天。在山羊中形成了小型植物粪石，但在喂食纤毛金盏花和多花艾纳香材料的绵羊中未形成。得出的结论是，食用大量几种卡鲁灌木丛成熟花朵或种子的山羊或绵羊可能会形成植物粪石。
