Bernes G, Waller P J, Christensson D
Department of Agricultural Research for Northern Sweden, Swedish University of Agricultural Sciences, Umeå.
Acta Vet Scand. 2000;41(4):351-61. doi: 10.1186/BF03549626.
Lotus corniculatus L., a leguminous plant containing condensed tannins, is now being evaluated in Sweden as a component of mixed pastures. This is because of its high nutritive value, palatability, modest requirement for water, calcium and phosphorous and particularly because it has the ability to survive harsh weather conditions that typify northern Scandinavia. This trial was undertaken to assess the possible parasitological benefits of using L. corniculatus when fed as a minor component in a mixed pasture sward to young sheep. This was compared with similar sheep that were fed pasture with a comparable legume content consisting of Trifolium repens L. Separate groups of lambs, maintained in pens and provided with fresh pasture cuts containing either L. corniculatus or T. repens each day, were trickle-dosed with infective larvae of mixed parasite species. For each pasture type, groups of 6 lambs had either established worm burdens only, received incoming infections only, or had the combination of both adult and incoming infections. Worm burdens were monitored by serial faecal egg counts and at the termination of the study, all animals were slaughtered for worm recovery, identification and enumeration. The results showed that there were no differential effects between L. corniculatus and T. repens on the different stages of development for a range of nematode parasite species recovered from these lambs. Several reasons may account for this: such as the low level of condensed tannins in the L. corniculatus variety tested, the minor proportion of this plant in the diet and/or the variety of L. corniculatus used in this trial which do not provide any benefits to controlling parasites of sheep.
百脉根，一种含有缩合单宁的豆科植物，目前正在瑞典作为混合牧场的一个组成部分进行评估。这是因为它具有高营养价值、适口性好、对水、钙和磷的需求适中，特别是因为它有能力在斯堪的纳维亚半岛北部典型的恶劣天气条件下生存。本试验旨在评估在混合牧草草甸中作为次要成分喂给幼羊时使用百脉根可能带来的寄生虫学益处。将其与喂食含有类似豆科植物含量（白三叶草）的牧场的相似绵羊进行比较。将单独分组的羔羊饲养在围栏中，每天为其提供含有百脉根或白三叶草的新鲜牧草切块，并对其点滴接种混合寄生虫种类的感染性幼虫。对于每种牧场类型，6只羔羊组成的组要么仅感染了已有的蠕虫负担，要么仅接受新的感染，要么同时有成年蠕虫和新感染。通过连续粪便虫卵计数监测蠕虫负担，在研究结束时，宰杀所有动物以回收、鉴定和计数蠕虫。结果表明，从这些羔羊体内回收的一系列线虫寄生虫种类，百脉根和白三叶草在不同发育阶段没有差异影响。对此可能有几个原因：例如，所测试的百脉根品种中缩合单宁含量低，这种植物在日粮中的比例小，和/或本试验中使用的百脉根品种对控制绵羊寄生虫没有任何益处。
