The efficacy of a high magnesium grass cultivar in controlling hypomagnesaemia in grazing animals
The efficacy of a high magnesium grass cultivar in controlling hypomagnesaemia in grazing animals
复制标题
高镁草品种控制放牧动物低镁血症的功效
DOI：
10.1111/j.1365-2494.1991.tb02397.x
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发表时间：
1991
影响因子：
2.4
通讯作者：
D. Baker
中科院分区：
文献类型：
--
作者：
G. Moseley;D. Baker
一个品种的意大利黑麦草（Bb 2067），专门培育的高镁含量，评估其疗效，在缓解哺乳期母羊低镁血症的发病率。对患者和动物管理进行了监管，以最大限度地提高低镁血症发生的可能性。放牧对照牧场（CV。RvP）在前10天内为21%，这伴随着血清镁浓度显著下降35%。放牧高镁品种母羊的发病率仅为2.5%，血清镁浓度无显著变化。
Bb2067牧草的镁含量（1.45gkgDM-1）比cv. RvP（0.93 g kg DM~（-1）），钙、磷分别提高15%和30%。放牧Bb 2067的母羊平均干物质摄入量高于放牧RvP的母羊，尽管差异不显着，但放牧Bb 2067的母羊镁、钙和磷的摄入量与RvP相比显着增加。放牧Bb 2067的母羊镁摄入量超过推荐允许量，钙和磷接近充足，而放牧RvP的母羊则严重缺乏所有三种矿物质。
有没有显着差异，母羊体重损失之间的治疗，但羔羊增重显着大于Bb 2067牧场相比，对CV。RvP。
得出的结论是，高镁草提供了一种有效的手段，控制低镁血症放牧下，尽管在本试验中施加的极端易感条件。
A cultivar of Italian ryegrass (Bb 2067), specifically bred for high magnesium content, was assessed for its efficacy in alleviating the incidence of hypomagnesaemia in lactating ewes. Pasture and animal management was regulated to maximize the potential for the development of hypomagnesaemia. The incidence of clinical hypomagnesaemia in ewes grazing the control pasture (cv. RvP) was 21% within the first 10 days and this was accompanied by a significant fall of 35% in serum magnesium concentration. The incidence in ewes grazing the high magnesium cultivar was only 2·5% and there was no significant change in the serum magnesium concentration.
The mean magnesium content of Bb 2067 herbage (1·45 gkg DM-1) was 48% higher than cv. RvP (0·93 g kg DM-1) while calcium and phosphorus were 15% and 30% higher. The mean dry matter intake of ewes grazing Bb 2067 was higher than that of ewes grazing RvP, and although the difference was not statistically significant there were significantly increased intakes of magnesium, calcium and phosphorus for ewes grazing Bb 2067 compared with RvP. Ewes grazing Bb 2067 ingested more than the recommended allowance of magnesium and were close to sufficiency for calcium and phosphorus, while those grazing RvP were in serious deficit for all three minerals.
There was no significant difference in the ewe body weight loss between the treatments but lamb liveweight gain was significantly greater on the Bb 2067 pastures compared with those on cv. RvP.
It was concluded that the high magnesium grass provided an effective means of controlling hypomagnesaemia under grazing despite the extreme predisposing conditions imposed in this trial.