| 摘要: |
| 由于水稻能吸收和积累较多量的汞,故选用水稻为试验作物。当含汞污泥施用于土壤中后,一般并不影响水稻的生长和发育,因此制定污泥中汞的容许标准时,取决于米中的汞的含量是否超过食品卫生标准,而无需考虑汞对水稻生长和发育的影响。在作物中,吸收和积累汞的次序为:水稻>白菜>萝卜>玉米>高粱>小麦。在水稻土中,收获时土壤中汞的残留率为90%。通过试验和计算后提出:在石灰性土壤中,农用污泥汞控制标准为17毫克/公斤;酸性土中,6毫克/公斤。 |
| 关键词: 盆栽试验 残留率 含汞量 吸收积累 农作物 污泥施用 含汞污泥 酸性土壤 水稻土 石灰性土壤 |
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| A STUDY OF THE PERMISSIBLE LEVEL OF MERCURY IN THE UTILIZATION OF SLUDGE ON LAND |
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| Abstract: |
| Rice being the crop which can absorb and accumulate mercury in larger amount,we select it as the test crop.When mercury compound of definite amount following the sludge had been added to the soil,no effect on the growth and development of the rice were observed.Hen- ce,the basis for making out the permissible level of mercury in sludge depended on whether the mercury cont ents in the rice exceeded the food hygenic standard,and there was no necessity to consider the effect of mercury on the growth and develo... |
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