Bian Chuanfei, Wang Long, Cui Zongyin, Dong Zemin, Shi Xianluo, Li Yuqi, Li Baotong
College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China.
College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang 330045, China; Agricultural Technology Extension Center of Jiangxi Province, Nanchang 330046, China.
Ecotoxicol Environ Saf. 2022 Apr 1;234:113378. doi: 10.1016/j.ecoenv.2022.113378. Epub 2022 Mar 4.
Pydiflumetofen, a fungicide of the class of succinate dehydrogenase inhibitors, can disrupt energy metabolism by inhibiting the synthesis of succinate dehydrogenase, thus effectively inhibiting pathogenic fungal growth and related yield losses.We studied the adsorption and desorption behaviors and interaction mechanisms of pydiflumetofen in eight different arable soils by the infrared spectroscopy and batch equilibrium method. Pydiflumetofen adsorption and desorption property of soils conformed with the Freundlich isotherm model and the values for the adsorption capacity K were in the range of 14.592-102.610. The adsorption constants (K) exhibited a significantly positive and linear correlation (p < 0.1) with soil organic matter and organic carbon content. Both high and low temperatures weakened the pydiflumetofen sorption capacity of the soil. In addition, the initial pH of the solution, its ionic strength, and the addition of exogenous biochar, humic acid, and different types of surfactants at different concentrations also affected the sorption property of the soil. Pydiflumetofen is weakly mobile and leachable in most soils, and, poses some threat to surface soil and water organisms, but does not contaminate groundwater.
氟吡菌酰胺是一种琥珀酸脱氢酶抑制剂类杀菌剂，它可通过抑制琥珀酸脱氢酶的合成来扰乱能量代谢，从而有效抑制致病真菌的生长及相关产量损失。我们采用红外光谱法和批量平衡法研究了氟吡菌酰胺在八种不同耕地土壤中的吸附和解吸行为及相互作用机制。土壤对氟吡菌酰胺的吸附和解吸特性符合弗伦德里希等温线模型，吸附容量K值在14.592 - 102.610范围内。吸附常数（K）与土壤有机质和有机碳含量呈显著正线性相关（p < 0.1）。高温和低温均会削弱土壤对氟吡菌酰胺的吸附能力。此外，溶液的初始pH值、离子强度以及不同浓度外源生物炭、腐殖酸和不同类型表面活性剂的添加也会影响土壤的吸附特性。氟吡菌酰胺在大多数土壤中移动性和淋溶性较弱，对表层土壤和水生生物有一定威胁，但不会污染地下水。
