•研究论文•doi:10.16801/j.issn.1008-7303.2022.012625%双环磺草酮悬浮剂对不同叶龄期水稻品种的安全性评价田志慧,袁国徽,高原,沈国辉*(上海市农业科学院生态环境保护研究所，上海201403)摘要：双环磺草酮是在我国取得水稻田使用登记许可的HPPD抑制剂类除草剂，杀草谱广，尤其对抗性千金子、杂草稻等恶性杂草表现出良好的防除效果。为进一步探索双环磺草酮在直播稻田的应用前景和应用技术，采用盆栽试验法，开展了25%双环磺草酮悬浮剂(SC)对不同叶龄期水稻品种的安全性评价。结果表明：在水稻1~2叶期、2~3叶期和3~4叶期浅水层条件和水稻1~2叶期湿润条件下，按有效成分150~375g/hm2剂量施用25%双环磺草酮SC，对上海地区主栽的3个常规粳稻品种南粳46、沪软1212和松香粳1018以及申优26杂交粳稻品种生长均安全，对水稻株高、植株地上部分鲜重、根长、根系鲜重等生长指标均无显著影响。表明双环磺草酮对水稻粳稻品种安全，待进一步明确应用技术后，有望成为直播稻田优秀的除草剂品种。关键词:双环磺草酮；水稻；品种；叶龄；安全性中图分类号：S482.4文献标志码：ASafetyevaluationofbenzobicyclon25%SConricevarietiesatdifferentleafstagesTIANZhihui,YUANGuohui,GAOYuan,SHENGuohui*(Eco-EnvironmentalProtectionResearchInstitute,ShanghaiAcademyofAgriculturalSciences,Shanghai201403,China)Abstract:Benzobicyclonisa4-hydroxyphenylpyruvatedioxygenase(HPPD)-inhibitingherbicidethatwasregisteredinChinesericeproduction.Ithasawideherbicidalspectrum,especiallygoodcontrolefficacyonmalignantweedssuchasresistantChinesesprangletop(Leptochloachinensis),weedyrice(Oryzasativaf.spontanea),andsoon.Inordertoexploretheapplicationprospectandtechnologyofbenzobicycloninthedirectseedingricefield,thesafetyevaluationofbenzobicyclon25%SConvariousricevarietiesatdifferentleafstageswasstudiedbythepot-cultureexperiment.Theresultsshowedthat:Underwhethertheconditionofshallowwaterat1-2leafstage,2-3leafstage,and3-4leafstageofrice,orthewetconditionatthe1-2leafstageofrice,theapplicationof150-375ga.i./hm2of收稿日期：2022-05-17；录用日期：2022-10-18；网络首发日期：2022-12-28.Received:May17,2022;Accepted:October18,2022;Publishedonline:December28,2022.URL:https://doi.org/10.16801/j.issn.1008-7303.2...
