Abstract A survey involving 3411 geographical sites was carried out to obtain information on the concentration of Mn typically found in grass-clover pastures in New Zealand. There was little evidence that excess Mn was a major limiting factor for pasture growth. Only 6 sites had Mn concentrations in the herbage above the level which adversely affects the growth of white clover, and no site had concentrations in excess of that which depresses the growth of ryegrass. The mean concentrations for the North and South Islands were 159 and 181 mg Mn/kg DM respectively. In addition it was estimated that the growth of lucerne would have been adversely affected by excess Mn in only 2070 of the sites sampled. The results of the survey are briefly discussed in relation to animal health.
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机译：摘要进行了一项涉及3411个地理位置的调查，以获取新西兰草 - 三叶草牧场中通常发现的Mn浓度的信息。几乎没有证据表明过量的Mn是牧场生长的主要限制因素。在牧草中，只有6位点在牧草中得到了不利影响白三叶草生长的水平，并且没有浓度超过其抑制黑麦草生长的素浓度。北部和南岛的平均浓度分别为159和181mg MN / kg DM。此外，据估计，只有2070个样本的网站，液化葡萄内的生长将受到多余Mn的不利影响。简要讨论了对动物健康的调查结果。
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