| 三环唑在稻-土-水体系中的持留、迁移变化 |
| 摘要点击 888 全文点击 1156 投稿时间：1990-01-09 |
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| 中文关键词 环唑 稻土(青紫泥、小粉土、海涂土) 纵向渗漏 横向迁移 水稻秧苗 |
| 英文关键词 tricyclazole soil persistence residue |
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| 中文摘要 |
| 采用田间试验与模拟试验相结合,研究了二环唑在南方稻区稻-土-水体系中的残留与迁变。结果表明,三种土壤吸附性能,海涂土最差,小粉土与青紫泥相差不大。三环唑在海涂土和小粉土上渗漏性有明显差异,吸附性差的海涂土渗漏速率大;不同淋洗水量对海涂土渗漏性影响随淋洗量增加而增大,在田间实际用药水平下,三环唑能够纵向渗漏至地下水,渗漏特性为海涂土>小粉土>青紫泥;三环唑还能够通过地表水流失横向迁移到周围池塘水中,速度较纵向渗漏快。室内控制条件下,水稻秧苗能够吸收土-水体系中的农药,且吸收量与水中农药浓度呈正相关,达极显著水平(0.01水平)。三环唑残留量采用凝结法净化,GC-FPD(S-型)检测。 |
| 英文摘要 |
| Reported in this paper is the residues and variations of tricyclazole in the rice-water-soil system of rice fields in Zhejiang Province by means of field tests and simulation. The results showed that the adsorption curves of three kinds of soil comformed to Freudliche adsorption equation. Xiaoshan loamy silt had less adsorption ability of tricyclazole than the other two soils. In the pot tests, there existed obvious differences of its leaching ability between loamy silt and silty loam with same eluting water volume. In practically applied dosages, tricyclazole was able to leach down to ground water. Its leaching ability in the soils followed this order: loamy silt> silty loam>clay loam. It could move laterally to the ponds around by flowing water. Rice plants adsorbed tricyclazole from soil-water system, and a very remarkable relationship appeared between its amount taken up by rice plants and its concentrations in water(at 0.01 level). In this research, the tricyclazole residues were determined by using GC-FPD(S-Mode)after the samples of soils and rice plants had been purified by coagulation. |
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