戊唑醇在不同类型香蕉种植土壤中的环境行为研究

崔媛媛; 周佳; 梁水连; 王明月; 戎瑜; 宋佳; 吕岱竹

doi:10.16768/j.issn.1004-874X.2021.07.011

戊唑醇在不同类型香蕉种植土壤中的环境行为研究

Study on Environmental Behavior of Tebuconazole in Different Banana Planting Soils

摘要

摘要:
目的探讨戊唑醇在不同类型香蕉种植土壤中的主要环境行为情况。
方法建立土壤中戊唑醇气相色谱- 质谱检测
方法 (GC-MS)，研究其在海南砖红壤、云南沙土、福建平原冲积土3种典型香蕉种植土壤中的降解、吸附、淋溶行为，评价戊唑醇在不同土壤类型中的消解和迁移能力。
结果戊唑醇的平均添加回收率为81.20%~100.80%，相对标准偏差为2.81%~4.35%，在0.0125~0.25.00μg/mL有着良好的线性关系。戊唑醇在土壤中的降解动态方程符合一级动力学方程，在海南砖红壤、云南沙土、福建平原冲积土3种不同土壤中降解半衰期分别为21.07、19.92、24.76 d。
结论戊唑醇在云南沙土中的降解最快，在福建平原冲积土中的降解最慢；海南砖红壤对戊唑醇的吸附能力最强，云南沙土的吸附性最差，均表现为易吸附；戊唑醇在3种土壤中均表现为难淋溶。

Abstract:
Objective The study was carried out to explore the main environmental behavior of tebuconazole in different types of banana planting soils.
Method A GC-MS method was established for the detection of tebuconazole in soil. The degradation, adsorption and leaching behavior of tebuconazole in three typical types of banana planting soils, namely, Hainan latosol, Yunnan sandy soil and Fujian plain alluvial soil, were studied. And the digestion and migration of tebuconazole in different types of soils were evaluated.
Result The average recovery rate of tebuconazole was 81.20%-100.80%, the relative standard deviation was 2.81%-4.35% and the linear range was 0.0125-0.25 μg/mL. The degradation dynamic equation of tebuconazole in soil matched with the first-order kinetic equation, and its half-life period in three different soils were 21.07d, 19.92d and 24.76 d.
Conclusion Tebuconazole was degraded fastest in Yunnan sandy soil and slowest in Fujian plain alluvial soil. The Hainan latosol had the strongest adsorption capacity, and the Yunnan sandy soil had the worst adsorption capacity, both of which were easy to adsorb tebuconazole. Tebuconazole was difficult to leach in the three soils.

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