土壤中氟磺胺草醚及其降解产物对后茬作物玉米生长及原卟啉原氧化酶活性的影响  

Effects of soil-applied fomesafen and its degradation products on growth of subsequent maize crops and their PPO activity

作　　者：刘娅彤 赵可瑜 曹佳琪 张茜茜 崔瀚文 王浩[1] 赵李霞[1] 邹月利[1] LIU Yatong;ZHAO Keyu;CAO Jiaqi;ZHANG Qianqian;CUI Hanwen;WANG Hao;ZHAO Lixia;ZOU Yueli(School of Arts and Sciences,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]东北农业大学文理学院,哈尔滨150030

出　　处：《东北农业大学学报》2024年第8期39-48,共10页Journal of Northeast Agricultural University

基　　金：黑龙江省省属高校“优秀青年教师基础研究支持计划”(YQJH2023204);国家级大学生创新创业训练计划(202310224083)。

摘　　要：采用固相萃取-超声微波辅助提取方法、超高效液相色谱-高分辨飞行时间质谱联用法,鉴定和分析土壤中氟磺胺草醚及其降解产物,推测得到氟磺胺草醚在土壤中的主要降解产物及代谢途径,并分析土壤中氟磺胺草醚及其降解产物对后茬作物玉米生长及原卟啉原氧化酶(PPO)活性的影响。结果表明:除草剂氟磺胺草醚在土壤中的残留对后茬玉米生长抑制作用显著,随除草剂残留量增加其抑制作用加剧。氟磺胺草醚降解产物在低浓度时对后茬玉米生长有促进作用,随浓度增加有轻微抑制作用,但低于氟磺胺草醚本身对作物的影响。The experiment employed a solid-phase extraction and ultrasonic-microwave-assisted extraction method,along with ultra-high-performance liquid chromatography coupled with highresolution time-of-flight mass spectrometry,to identify and analyze fomesafen and its degradation products in soil.The main degradation products and metabolic pathways of fomesafen in the soil were hypothesized.Additionally,the impact of fomesafen and its degradation products on the growth of subsequent crops,specifically maize,and on PPO activity was analyzed,and the results indicated that the residual herbicide fomesafen in the soil had a significant inhibitory effect on subsequent maize growth,which intensified with increasing residue levels.In contrast,the degradation products of fomesafen exhibited a promoting effect on maize growth at low concentrations,but showed slight inhibitory effects as the concentration increased.However,this inhibition was significantly lower than the impact of fomesafen itself on the crops.

关 键 词：氟磺胺草醚 土壤 代谢途径 降解产物 玉米 PPO 

分 类 号：S513[农业科学—作物学]