Reducing the effects of clover disease by strategic grazing of pastures
Reducing the effects of clover disease by strategic grazing of pastures
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DOI：
10.1111/j.1751-0813.1996.tb10026.x
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发表时间：
1996-05-01
影响因子：
1.1
通讯作者：
Little, DL
中科院分区：
文献类型：
--
作者：
Little, DL
报告了1980年至1983年在南澳大利亚袋鼠岛的一个农场实施的放牧管理方案的结果，该农场的母羊被怀疑受到三叶草病的影响。该农场有羔羊标记不良的历史（在过去8年里有30-50%），最初对牧场的偶然检查发现，由于地下三叶草（trifolium subterranum），可能存在植物雌激素问题。制定了一项战略性放牧方案，使最年轻的母羊在植物雌激素水平最低的牧场上喂养。根据3只美利奴母羊的繁殖性能对放牧方案的影响进行了评估。在有策略的放牧下，1981年和1983年羔羊标记率分别增加到68%和73%，1982年羔羊死亡率高而母羊生育率低使标记率降低到49%。结论是，战略性放牧管理方案通过确保最年轻的母羊在其繁殖期后期之前尽量减少与雌激素牧场的接触，从而减少了三叶草病的影响。
The results of a grazing management programme implemented from 1980 to 1983 on a farm on Kangaroo Island, South Australia, where ewes were suspected of being affected by clover disease is reported. The farm had a history of poor lamb marking (30-50% over the previous 8 years) and an initial casual inspection of the pastures revealed a potential phyto-oestrogen problem due toTrifolium subterraneum. A strategic grazing programme was developed so that the youngest ewes fed on the pastures with the lowest levels of phyto-oestrogens. The effect of the grazing programme was assessed from the subsequent reproductive performance of 3 Merino ewe flocks. With strategic grazing, the lamb marking percentages increased to 68% and 73% in 1981 and 1983, respectively, with high lamb mortality rather than low ewe fertility reducing the percentage to 49% in 1982. It is concluded that the strategic grazing management programme reduced the effects of clover disease by ensuring that the youngest ewes had minimal contact with oestrogenic pastures until later in their reproductive lives.