Li Shasha, Liu Xingang, Chen Chao, Dong Fengshou, Xu Jun, Zheng Yongquan
State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
Bull Environ Contam Toxicol. 2015 Jul;95(1):45-50. doi: 10.1007/s00128-015-1556-y. Epub 2015 May 3.
The persistence and fate of fluxapyroxad were investigated including studies with four soils from Hunan (HN), Shanxi (SX), Jiangsu (JS), and Heilongjiang (HLJ) and two water/sediment systems (water/sediment systems 1 and 2) from Beijing, China. The results demonstrated that the biodegradation efficiency of fluxapyroxad in soils under aerobic conditions was higher than that observed under anaerobic conditions. The order of degradation capability was HLJ soil > JS soil > SX soil > HN soil, and fluxapyroxad dissipated faster in water/sediment system 2 than in system 1. The tested systems (four soils and two water/sediments systems) with rich organic matter content, high oxygen level and neutral pH had a high potential to degrade fluxapyroxad, possibly because rich organic matter and oxygen level stimulated microbial activity and the neutral pH was suitable for microbial growth. These results showed that fluxapyroxad exhibited high persistence in tested systems, with half-lives ≥157.6 day.
对氟唑菌酰胺的持久性和归宿进行了研究，包括对来自湖南（HN）、山西（SX）、江苏（JS）和黑龙江（HLJ）的四种土壤，以及来自中国北京的两个水/沉积物系统（水/沉积物系统1和2）的研究。结果表明，在好氧条件下，土壤中氟唑菌酰胺的生物降解效率高于厌氧条件下的效率。降解能力顺序为HLJ土壤>JS土壤>SX土壤>HN土壤，且氟唑菌酰胺在水/沉积物系统2中的消散速度比在系统1中更快。测试系统（四种土壤和两个水/沉积物系统）具有丰富的有机质含量、高氧水平和中性pH值，具有较高的降解氟唑菌酰胺的潜力，这可能是因为丰富的有机质和氧水平刺激了微生物活性，而中性pH值适合微生物生长。这些结果表明，氟唑菌酰胺在测试系统中表现出高持久性，半衰期≥157.6天。
