| 公路边土壤和水稻中铅的分布、累积及临界含量 |
| 摘要点击 1841 全文点击 1650 投稿时间：1995-03-23 |
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| 中文关键词 铅 公路 土壤 水稻 临界含量 |
| 英文关键词 soil rice lead road critical level |
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| 中文摘要 |
| 在距公路5、10、50、100、200m准备收割的稻田中同时采集土壤及稻米样品。对2条公路的样品分析结果表明,汽车尾气中铅的污染大多集中在公路两侧50m左右的范围内。土壤自身性质对路边土壤及水稻中铅的分布、累积具有显着影响。轻壤水稻土中铅的累积量小于重壤水稻土,但轻壤水稻糙米的含铅量却高于重壤。轻壤中土壤含铅量和糙米含铅量之间具有相关关系。探讨了公路边土壤的临界含量问题,推算出轻壤中此值为58mg/kg,远小于盆栽实验和污灌地区。 |
| 英文摘要 |
| he soil and rice samples were collected simultaneously at the sites of 5,10,50,100 and 200 meters away from road,respectively. The analysis results of samples collected along two roads demonstrated that the pollution of lead from automobile exhaust gas was within a range of about 50m along the roads. The soil characteristics had a significant effect on the distribution and accumulation of lead in soil and rice. The accumulation amount of lead in light loam was less than that in heavy loam,but the lead content of brown rice was more than that in heavy one. Correlation between the lead content of soil and that of brown rice bud been shown in light loam. Based on it,the critical level of soil along road side had been discussed. The predicted value was 58mg/kg,much less than that of pot experiments and the area irrigated with waste water. |
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