春雷霉素在水稻上的残留与消解动态研究

为了评价春雷霉素在水稻上使用的安全性,建立其使用规范,2010-2011年在河南、黑龙江和江苏3地进行了10%春雷霉素可湿性粉剂在水稻上的消解动态和最终残留试验。消解动态试验结果表明:春雷霉素在水稻田水和植株中的半衰期分别为0.97².70 d和1.002.70 d和1.00².18 d。最终残留试验表明:10%春雷霉素可湿性粉剂按推荐剂量(40 g/hm2)和1.5倍推荐剂量(60 g/hm2)在病害发生期施药32.18 d。最终残留试验表明:10%春雷霉素可湿性粉剂按推荐剂量(40 g/hm2)和1.5倍推荐剂量(60 g/hm2)在病害发生期施药3⁴次,末次施药后14,21,28 d,春雷霉素在糙米中残留量≤0.022 mg/kg,稻壳中≤0.269 mg/kg,植株中≤0.159 mg/kg,土壤中≤0.005 mg/kg。

Research on Residues and Degradation Dynamics of Kasugamycin in Rice

In order to evaluate the safety and establish the regular use of kasugamycin in rice field,the field trials for kasugamycin 10% WP were conducted in Henan,Heilongjiang and Jiangsu in 2010-2011.The results from field experiment of degradation dynamic indicated that the half-lives of kasugamycin in water and rice plant were 0.97-2.70 d,1.00-2.18 d,respectively.The final residue indicated that when the rice plant was sprayed 3-4 times with 10%kasugamycin WP at the active ingredient dosage of 40 g/hm2and 60 g/hm2,the total residues of kasugamycin in brown rice,rice husk,rice plant and soil were less than 0.022 mg/kg,0.269 mg/kg,0.159 mg/kg and 0.005 mg/kg on 14th,21th,28th days after the last spraying,respectively.