CAJ | 학술논문

采用物理模拟人工降雨的方法初步研究了淹水条件下氟虫腈在江西红壤和嘉兴水稻土的淋溶行为,农药添加量为最高推荐用量的倍量,降雨量为180 mm·d~(-1).结果表明,经过7 d模拟人工降雨后,在嘉兴土中,95%的农药仍驻留在0～15 cm的土壤中,驻留量随深度增加而减少,尤其在10 cm以下驻留量很小;江西土中,经过7 d淋溶,有近50%的农药穿过了淋溶柱,其最大淋溶深度还有待进一步研究.因此,在嘉兴水稻土中施用氟虫腈,对地下水的影响较小;在江西红壤中施用氟虫腈,将会对地下水产生潜在威胁.
채용물리모의인공강우적방법초보연구료엄수조건하불충정재강서홍양화가흥수도토적림용행위,농약첨가량위최고추천용량적배량,강우량위180 mm·d~(-1).결과표명,경과7 d모의인공강우후,재가흥토중,95%적농약잉주류재0～15 cm적토양중,주류량수심도증가이감소,우기재10 cm이하주류량흔소;강서토중,경과7 d림용,유근50%적농약천과료림용주,기최대림용심도환유대진일보연구.인차,재가흥수도토중시용불충정,대지하수적영향교소;재강서홍양중시용불충정,장회대지하수산생잠재위협.
Leaching behaviors of fipronil in Jiaxing paddy soil and Jiangxi red soil were studied in the continuous flooding situation using physical simulating artificial rainfall method. The amount of fipronil added was twice of the maximum dosage recommended and the rainfall volume was 180 mm·d~(-1). The results showed that the added fipronil was mostly distributed in 0～15 cm layer in Jiaxing paddy soil column after 7 days' continuous leaching and reduced with the deepness adding. However, about 50 percent of added fipronil was leached through column in Jiaxing red soil, and the maximum leaching deepness was still waiting for being further studied. Thus, it can be concluded that the influence of fipronil on groundwater was small relatively when used in Jiaxing paddy soil, but there was potential risk on groundwater when used in Jiangxi red soil.