在半干旱的热带,即包括非洲和亚洲的一部分以及几乎饶地球一周的这一生态带,小米是重要的粮食作物之一,由于它可以四季生长,因此小米是这些地区许多贫穷人口的主要食物能量来源。流行病学资料表明小米是造成这个地带的某些农村甲状腺肿高度流行的一种因素。一些零散的资料证明小米 Millet is one of the most important food crops in the semi-arid tropics, including parts of Africa and Asia, and this ecologically-stripe-shaped zone of almost a week of earth, and as it grows in all seasons, millet is the staple food for many of the poor in these areas Energy source. Epidemiological data suggest that millet is a contributing factor to the high prevalence of goitre in some rural areas of the region. Some scattered data prove that millet