CAJ | 학술논문

为评价多菌灵在浙麦冬及其土壤中的安全性,建立其在浙麦冬上的使用规范,采用高效液相色谱法研究了多菌灵50%可湿性粉剂(WP)在浙麦冬及其土壤中的残留动态.结果表明,多菌灵在添加水平0.05～2.00 mg/kg范围内的平均回收率在84.6%～98.3%之间,相对标准偏差均低于6.7%.在有效成分含量(下同)0.675和1.000 kg/hm~2两个施药剂量下,多菌灵50% WP在浙麦冬土壤中的半衰期为5.74～7.07 d,在茎叶上的半衰期为3.60～5.35 d,在根中残留量先升后降,其半衰期为2.01～3.60 d.多菌灵在浙麦冬及其土壤中易降解,当施药剂量较高或原始沉积量较高时,所对应的半衰期较短.若多菌灵在浙麦冬及其土壤中的最高残留限量推荐值为0.1 mg/kg,每年以0.675 kg/hm~2的剂量喷施2次,则建议安全间隔期为15 d.
위평개다균령재절맥동급기토양중적안전성,건립기재절맥동상적사용규범,채용고효액상색보법연구료다균령50%가습성분제(WP)재절맥동급기토양중적잔류동태.결과표명,다균령재첨가수평0.05～2.00 mg/kg범위내적평균회수솔재84.6%～98.3%지간,상대표준편차균저우6.7%.재유효성분함량(하동)0.675화1.000 kg/hm~2량개시약제량하,다균령50% WP재절맥동토양중적반쇠기위5.74～7.07 d,재경협상적반쇠기위3.60～5.35 d,재근중잔류량선승후강,기반쇠기위2.01～3.60 d.다균령재절맥동급기토양중역강해,당시약제량교고혹원시침적량교고시,소대응적반쇠기교단.약다균령재절맥동급기토양중적최고잔류한량추천치위0.1 mg/kg,매년이0.675 kg/hm~2적제량분시2차,칙건의안전간격기위15 d.
Residue dynamics of carbendazim in Radix Ophiopogonis and cultivated soil was studied.The average recoveries of carbendazim at fortified level 0.05- 2.00 mg/kg in Radix Ophiopogonis and soil were 84.6%- 98.3%,with RSDs of less than 6.7%.The half lives of carbendazim were 5.74- 7.07 d in the cultivated soil,3.60- 5.35 d on the leaf and 2.01- 3.60 d in the roots,respectively.When 0.675 kg(ai)/hm~2 carbendazim was sprayed twice a year,15 days were proposed as the minimum preharvest interval of carbendazim in the Radix Ophiopogonis if 0.1 mg/kg was considered as the MRL of carbendazim in the Radix Ophiopogonis.