Division of Agricultural Chemicals, IARI, LBS Building, New Delhi, 110012, India.
ICAR-National Organic Farming Research Institute, Tadong, Gangtok, 737102, Sikkim, India.
Environ Sci Pollut Res Int. 2016 Oct;23(19):19931-9. doi: 10.1007/s11356-016-7145-8. Epub 2016 Jul 19.
An experiment was conducted under three levels of atmospheric CO2 [ambient (398 ± 10 μmol mol(-1)), elevated (570 ± 10 μmol mol(-1)) and open condition], three levels of temperature (4, 25, and 40 °C) to study the degradation pattern of flubendiamide in soil and also carbon mineralization in soil. Results of this study revealed that flubendiamide was found to persist longer under outdoor condition (T1/2, 177.0 and 181.1 days) than ambient (T1/2, 168.4 and 172.3 days) and elevated condition (T1/2, 159.3 and 155.3 days) at 1 and 10 μg g(-1) fortification level, respectively. Results also revealed that flubendiamide dissipated faster at 40 °C (T1/2, 189.4 days) than 25 °C (T1/2, 225.3 days). Slower dissipation was recorded at 4 °C (T1/2, 326.3 days). Thus, increased CO2 levels and temperature following global warming might adversely affect flubendiamide degradation in soil. Laboratory study on microbial biomass carbon (MBC) and carbon mineralization (Cmin) in soil revealed that in des-iodo flubendiamide-treated soils, MBC significantly increased up to 45 days and then decreased. Flubendiamide-treated soil showed a non-significantly decreasing trend of soil MBC with time up to the 15th day of incubation and after 15 days significantly decreased up to 90 days of incubation. In des-iodo flubendiamide-treated soil, the evolution of CO2 decreased up to 45 days, which was increased after 45 days up to 90 days. In flubendiamide-treated soil, CO2 evolution decreased up to 30 days and after 45 days, it increased up to 90 days.
在三种大气 CO2 水平（环境（398±10 μmol mol(-1))、升高（570±10 μmol mol(-1))和开放条件）、三种温度水平（4、25 和 40°C）下进行了一项实验，以研究氟苯虫酰胺在土壤中的降解模式以及土壤中的碳矿化作用。本研究结果表明，氟苯虫酰胺在户外条件下（T1/2，177.0 和 181.1 天）比环境条件下（T1/2，168.4 和 172.3 天）和升高条件下（T1/2，159.3 和 155.3 天）分别延长了 1 和 10μg g(-1)的添加水平。结果还表明，氟苯虫酰胺在 40°C（T1/2，189.4 天）比 25°C（T1/2，225.3 天）更快地消散。在 4°C（T1/2，326.3 天）记录到较慢的消散。因此，全球变暖导致的 CO2 水平和温度升高可能会对土壤中氟苯虫酰胺的降解产生不利影响。土壤微生物生物量碳（MBC）和碳矿化（Cmin）的实验室研究表明，在脱碘氟苯虫酰胺处理的土壤中，MBC 显著增加至 45 天，然后减少。氟苯虫酰胺处理的土壤中，MBC 随时间呈非显著下降趋势，直至培养的第 15 天，然后在 15 天后至培养的第 90 天显著下降。在脱碘氟苯虫酰胺处理的土壤中，CO2 的演化减少至 45 天，在 45 天后增加至 90 天。在氟苯虫酰胺处理的土壤中，CO2 演化减少至 30 天，然后在 45 天后增加至 90 天。
