【摘要】 为了明确土壤中氯嘧磺隆对马铃薯和甜菜生育的影响,分别在苗期和生育盛期向盆栽土壤中灌施不同浓度的氯嘧磺隆溶液,调查作物生育产量。结果表明:供试的马铃薯和甜菜苗期耐药能力弱,生育盛期耐药能力增强;马铃薯耐药能力比甜菜强。马铃薯临界浓度苗期为0.017 a.i.mg/kg土,生育盛期约为0.071 a.i.mg/kg土;甜菜苗期至少小于0.0002 a.i.mg/kg土,生育盛期约为0.011 a.i.mg/kg土。马铃薯苗期抑制产量EC50值约为0.065 a.i.mg/kg土,生育盛期约为0.200 a.i.mg/kg土;甜菜苗期因植株死亡未得到数据,生育盛期约为0.014 a.i.mg/kg土。更多还原

【Abstract】 Various concentrations of chlorimuron-ethyl were applied in pot planted to potato and sugar beet at seedling and full-growing stages,and the growth and yield of both crops were investigated in order to understand the effects of chlorimuron-ethyl on yields of potato and sugar beet.Chlorimuron-ethyl tolerance was weaker at seedling stage than full-growing stage for both potato and sugar beet,and potato was more tolerant as compared with sugar beet.As for the critical concentration of potato,it was 0.017 a.i.mg/kg soil at seedling stage and 0.071 a.i.mg/kg soil at full-growing stage.For sugar beet,it was at least 0.0002 a.i.mg/kg soil at seedling stage(no sugar beet was survived when the concentration was more than 0.0002 a.i.mg/kg soil) and 0.011 mg/kg soil at full growing stage.EC 50 for yield inhibition of potato was 0.065 a.i.mg/kg soil at seedling stage and 0.200 a.i.mg/kg soil at full-growing stage.Because all sugar beet plants were died at seedling stage,no data of EC 50 were available for seedling stage.The value was 0.014 a.i.mg/kg soil at full growing stage.更多还原