Methiozolin is a novel herbicide for controlling annual bluegrass. After applying ¹⁴C labelled methiozolin in two sediment (clay loam and sand)-water systems under aerobic conditions, its distribution, half-life, and metabolites within 300 days were investigated. The mass balance ranged within 92.0%–104.4% of applied radioactivity (AR). Radioactivity in the water declined sharply from 94.4% to 0.5% AR, while in the sediment it increased to 83.9% AR at 14 days before declining to 9.1% AR. The volatiles were minimal (< 0.5% AR), and the evolved labelled CO₂ accounted for up to ~ 33.4% AR. From Radio-HPLC analysis, labelled methiozolin in water decreased from 108.9% to 0% AR, while a maximum of 15.1% AR remained in the sediment at the end. Eight metabolites were detected, all at minor levels and accounting for < 5.5% AR. The half-life of labelled methiozolin in the total sediment–water systems were 50.7 and 38.7 days for clay loam and sand, respectively.

甲硫唑啉是控制一年生禾草的新型除草剂。在好氧条件下，在两种沉积物（粘土壤土和沙子）-水系统中施用¹⁴ C标记的甲硫唑啉后，研究了其在300天内的分布，半衰期和代谢产物。质量平衡范围为所应用放射性（AR）的92.0％至104.4％。水中的放射性从94.4％的AR急剧下降到0.5％的AR，而沉积物中的放射性在14天前增加到83.9％的AR，然后下降到9.1％的AR。挥发物极少（<0.5％AR），并且释放出标记的CO ₂占AR的〜33.4％。通过放射-HPLC分析，水中的标记甲硫唑啉从108.9％降至AR的0％，而在沉积物中最后最多保留了15.1％的AR。检测到8种代谢物，全部处于次要水平，占AR的<5.5％。黏土壤土和沙子在全部沉积物-水系统中标记的甲硫唑啉的半衰期分别为50.7天和38.7天。