【摘要】 本文扼要介绍了喷施稀土定位试验。施用的稀土化合物中含R₂O₃38％,α比活度在137—2477Bq/kg之间,每亩施用稀土40g。在春小麦分蘖期喷施1次。将每年收获的小麦翌年再播种,使之连续接受喷施稀土处理。对春小麦、土壤逐年采样,测定α、β、铀放射性活度。结果表明,经10年连续施用稀土的春小麦和土壤,α、β、铀放射性活度没有出现随年次递增的趋势,处理组与对照没有显著差异。更多还原

【Abstract】 The experiment was conducted by spraying rare-earth on spring wheat in field plot conditions during 1981-1991. The α-radioactivity of the rare-earth was 137-2477 Bq/Kg, 40g/Mu of which applied in tillering stage of the spring wheat every year. The spring wheat seed was selected and sown year after year to make the seed treated continually by the rare earth. The spring wheat and soil samples were selected and α-radioactivity and uranium in the samples determined year by year. The result shown that the α-radioactivity and uranium in the spring wheat and soil were not increased as a trend correspondingly year by year with a ten-year period application of the rare-earth, There was no difference between treatment and contrast.更多还原