The ecotoxicity of nitrofurazone was analyzed based on a community-based approach using periphytic protozoa. Median lethal concentrations (LC₅₀) within an exposure time of 30 min were determined by an acute toxicity test at 0, 1.5, 3, 6 and 12 mg ml⁻¹ nitrofurazone. Toxicity curve tests demonstrated a decreasing trend with increasing exposure time and was well fitted to the toxicity equation LC₅₀ = 32.85e^-0.8143t (t = exposure time; R² = 0.91; P < 0.05). Median inhibition concentrations (IC₅₀) for periphytic protozoan growth rates were obtained by chronic tests at 0, 1, 2, 4 and 8 mg ml⁻¹ nitrofurazone within 10 days exposure and were well fitted to the equation r_% = 0.3686e^-0.35Cnit (C_nit is the concentration of nitrofurazone; R² = 0.92 and P < 0.05). These findings suggest that the LC₅₀ and IC₅₀ values of nitrofurazone can be predicted for any exposure time using periphytic protozoan communities as a bioassay model.

基于基于社区的方法使用附生原生动物分析呋喃西林的生态毒性。在 0、1.5、3、6和 12 mg ml ^-1呋喃西林的急性毒性试验中测定了 30 分钟暴露时间内的中位致死浓度 ( LC _{50 )。}毒性曲线测试表明随着暴露时间的增加呈下降趋势，并且很好地拟合了毒性方程LC ₅₀  = 32.85e ^{-0.8143 t} ( t  = 暴露时间; R ²  = 0.91; P  < 0.05)。中位抑制浓度 ( IC ₅₀) 对于附生原生动物的生长速率是在 0、1、2、4 和 8 mg ml ^-1呋喃西林暴露 10 天内通过慢性试验获得的，并且很好地拟合方程r _%  = 0.3686e ^{-0.35 Cnit} ( C _nit是呋喃西林浓度；R ²  = 0.92 和P  < 0.05)。这些发现表明，使用附生原生动物群落作为生物测定模型，可以针对任何暴露时间预测呋喃西林的LC ₅₀和IC _50值。