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以江西省余江县中科院红壤试验基地三分场附近的低山丘陵区为研究区,应用核素示踪技术和化学方法相结合的手段,对研究区土壤样品中有机质、137Cs、210Pbex含量的剖面分布及其相关性做了分析,结果表明:在耕层深度内,有机质和137Cs含量呈显著的正相关关系,而210Pbex含量波动比较大,与有机质含量相关性较小;137Cs空间分布上的变化规律受地形空间分异的控制,除坡脚外不同部位有机质含量和137Cs含量相关系数呈现坡上部﹥坡中部﹥坡下部的特点。
Taking the hilly area near the three-hurdle of the Red Soil Experimental Base of CAS in Yujiang County, Jiangxi Province as the research area, the content of organic matter, 137Cs and 210Pbex in the soil samples of the study area was determined by the combination of radionuclide tracer and chemical methods The results showed that there was a significant positive correlation between the contents of 137Cs and the organic matter in the depth of tillage, while the content of 210Pbex was relatively large and the content of 210Pbex was less correlated with the organic matter content. The spatial distribution of 137Cs The variation pattern was controlled by the terrain spatial differentiation. The correlation coefficients of organic matter content and 137Cs content in different parts except the slope foot showed the characteristics of the upper part of the slope> the middle part of the slope> the lower part of the slope.