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Soil-type influences human selenium status and underlies widespread selenium deficiency risks in Malawi

机译:土壤类型会影响人类硒的状况,并成为马拉维普遍存在的硒缺乏风险的基础

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摘要

Selenium (Se) is an essential human micronutrient with critical roles in immune functioning and antioxidant defence. Estimates of dietary Se intakes and status are scarce for Africa although crop surveys indicate deficiency is probably widespread in Malawi. Here we show that Se deficiency is likely endemic in Malawi based on the Se status of adults consuming food from contrasting soil types. These data are consistent with food balance sheets and composition tables revealing that >80% of the Malawi population is at risk of dietary Se inadequacy. Risk of dietary Se inadequacy is >60% in seven other countries in Southern Africa, and 22% across Africa as a whole. Given that most Malawi soils cannot supply sufficient Se to cropsudfor adequate human nutrition, the cost and benefits of interventions to alleviate Se deficiency should beuddetermined; for example, Se-enriched nitrogen fertilisers could be adopted as in Finland.
机译:硒(Se)是人体必需的微量营养元素,在免疫功能和抗氧化防御方面具有关键作用。非洲的膳食中硒的摄入量和状况的估计数很少,尽管作物调查表明,马拉维缺乏症可能很普遍。在这里,我们显示马拉维的硒缺乏症很普遍,这是基于成年人从不同土壤类型中进食而摄入的硒的状况。这些数据与食品资产负债表和成分表一致,表明超过80%的马拉维人口面临饮食中硒缺乏的风险。在南部非洲的其他七个国家中,饮食中硒不足的风险大于60%,在整个非洲范围内为22%。鉴于大多数马拉维土壤无法为作物提供足够的硒,以提供充足的人类营养,因此应确定减轻硒缺乏的干预措施的成本和收益;例如,可以像芬兰那样采用富硒氮肥。

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