科研之友
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摘要
To evaluate the risk and safety of high dose bisultap granular application on the soil of sugarcane ecosystems in south China, two independent field trials were performed in Guangdong and Guangxi China in 2015 and 2016. Residue of bisultap in soil and the quantity transmit to sugarcane under field conditions were determined by a fast and simple method using gas chromatography with flame photometric detector (FPD). The average recovery of bisultap in soil and sugarcane ranged from 85.99% to 115.33% with a relative standard deviation (RSD) of 2.35% to 9.95%; The dissipation rates of bisultap in soil were described with first-order kinetics. The half-lives of bisultap in soil were from 2.35 to 5.68 days in Guangdong and Guangxi in 2015 and 2016. The residues of high dose (1.5 times of the recommended dosage) bisultap in soil ranged from 0.1284 to 6.4294 mg/kg at intervals of 10, 15, and 20 days. The bisultap concentrations in sugarcane range from 0.0137 to 0.3426 from 2h to 45d. The distribution of bisultap in soil was also investigated. The results suggest that no significant potential health risk would be induced by bisultap in sugarcane, but the residues in soil may pose pollution risks of deep layer soil.
