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本文用2,3-二氨基萘荧光法测定了嘉善16个乡共56份大米和48份土壤的硒含量,其平均值分别为0.027±0.007ppm和9.87±2.34 ppb.大肠癌发病率>50/10万的乡镇(1980～1984年的调查资料)环境中硒含量显著低于发病率<50/10万的乡镇.大肠癌发病率与大米硒含量以及土壤水溶性硒含量之间呈负相关,其等级相关系数分别为-0.543和-0.535,P值均小于0.05.测定结果表明,嘉善县属于低硒地区,居民在膳食中硒摄取量不足导致低血硒,这可能是嘉善高发大肠癌的一个危险因素.
In this paper, the selenium content of 56 rice and 48 soils in 16 townships of Jiashan was determined with 2,3-diaminonaphthalene fluorescence method, the average values were 0.027 ± 0.007ppm and 9.87 ± 2.34 ppb respectively.The incidence of colorectal cancer was> 50 / 100000 townships (survey data from 1980 to 1984), the content of selenium in the environment was significantly lower than that of the towns with the incidence of <50 / 100000. The incidence of colorectal cancer was negatively correlated with selenium content in rice and soil soluble selenium content , The rank correlation coefficients were -0.543 and -0.535 respectively, P values were less than 0.05.Results showed that Jiashan County was in the low-selenium area and residents were not selenium-rich in dietary intake, resulting in low blood selenium, which may be caused by Jiashan’s high incidence of colorectal cancer A risk factor.