该研究经多次试验而选定的亚硒酸钠制剂浓度和用量,通过在内蒙古喀喇沁旗克山病区5000亩土地的作物上进行喷硒试验。经10年试验表明,喷硒粮食含硒量接近或达到世界卫生组织提出的40—100μg/日的要求,从而使人体硒水平提高2—3倍,达到全国非病区农村人群发硒的水平, In this study, the concentration and amount of sodium selenite formulation selected through multiple trials were selenium-sprayed on crops of 5,000 mu in the Kake Shan area of ​​Kalaqin, Inner Mongolia. After 10 years of tests, selenium content of selenium-sprinkled grains approached or reached the requirement of 40-100 μg / day proposed by the World Health Organization so as to increase 2-3 times the body’s selenium level and reach the level of selenium in the rural population in non-wasting areas nationwide ,