乙氧氟草醚不同施药条件下对水稻安全性的影响  

Effects of Oxyfluorfen on Rice Safety Under Different Application Conditions

作　　者：张苏新 黄元炬[1] 王春[1] 李广雨 王芊[1] 刘亚光[2] ZHANG Suxin;HUANG Yuanju;WANG Chun;LI Guangyu;WANG Qian;LIU Yaguang(Institute of Plant Protection,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,China;College of Agronomy,Northeast Agricultural University,Harbin 150030,China)

机构地区：[1]黑龙江省农业科学院植物保护研究所,黑龙江哈尔滨150086 [2]东北农业大学农学院,黑龙江哈尔滨150030

出　　处：《黑龙江农业科学》2024年第11期31-36,共6页Heilongjiang Agricultural Sciences

基　　金：黑龙江省农业科技创新跨越工程重点攻关项目(CX23GG14);十四五国家重点研发计划项目(2023YFD1401100)。

摘　　要：为明确乙氧氟草醚不同时期、不同剂量施用对耐敏水稻的安全性,采用整株生物测定法分别测定乙氧氟草醚于水稻移栽前5,3和1 d及移栽后3和5 d施药对敏感性不同的水稻品种生长指标的影响。结果表明,对于耐药性水稻品种垦稻31而言,移栽前5~3 d施药,在乙氧氟草醚有效成分用量36~108 g·hm^(-2)下对水稻株高、分蘖及地上部鲜重均无显著抑制作用,对水稻安全;移栽前1 d施用时,乙氧氟草醚有效成分用量在36~54 g·hm^(-2)时对水稻生长指标影响较小,用药相对安全;移栽后3~5 d施药,有效成分用量为36 g·hm^(-2)时对水稻相对安全,有效成分用量高于36 g·hm^(-2)时水稻各项生长指标受到显著抑制。对于敏感性水稻品种龙粳39而言,乙氧氟草醚在移栽前5~3 d施用时,有效成分用量在36~54 g·hm^(-2)时对水稻相对安全,有效成分用量高于54 g·hm^(-2)时生长指标受到显著抑制作用;移栽前1 d、移栽后3~5 d施药,在有效成分用量36~108 g·hm^(-2)处理下,龙粳39各项生长指标受到显著抑制。乙氧氟草醚对敏感性不同的水稻品种最佳施药时期及施药剂量有差异,对于耐药水稻品种建议在移栽前5~3 d施用乙氧氟草醚,在推荐剂量范围内使用均安全;对于敏感性水稻品种如需施用乙氧氟草醚建议可在水稻移栽前5~3 d施用,有效成分用量不得超过54 g·hm^(-2),亦可混配其他除草剂共同施用。In order to clarify the safety of oxyfluorfen at different periods and doses on resistant and sensitive rice,in this experiment,whole plant bioassay was used to determine the effect of oxyfluorfen on the growth indicators of rice varieties with different sensitivity at 5 days,3 days and 1 day before and 3 days and 5 days after transplanting.The results showed that for resistant rice Kendao 31,applied oxyfluorfen 5 to 3 days before transplanting,without significant inhibition of plant height,tillering and fresh weight at 36 to 108 g·ha-1(effective ingredient dosage),for rice safety.When applied oxyfluorfen 1 day before transplanting,the effect on the growth index of rice was small at 36 to 54 g·ha-1(effective ingredient dosage),it was relatively safe for rice.It was relatively safe for rice 3 to 5 days after transplanting at 36 g·ha-1(effective ingredient dosage),when higher than 36 g·ha-1(effective ingredient dosage),rice growth indicators were significantly inhibited.For the sensitive rice variety Longjing 39,when oxyfluorfen was applied 5 to 3 days before transplanting,the application was relatively safe at 36 to 54 g·ha-1(effective ingredient dosage),and the growth indicators were significantly inhibited at higher than 54 g·ha-1(effective ingredient dosage).The growth indicators of Longjing 39 were significantly inhibited 1 day before and 3 to 5 days after transplanting with the application amount of 36 to 108 g·ha-1(effective ingredient dosage).Oxyfluorfen is different in the optimal application periods and doses of different rice varieties.For resistant rice varieties,it is recommended to apply oxyfluorfen 5 to 3 days before transplanting,which is safe to use within the recommended dose range.For sensitive rice varieties,it should be applied 5 to 3 days before rice transplanting,and the dose should not exceed 54 g·ha-1(effective ingredient dosage),or mixed with other herbicides.

关 键 词：乙氧氟草醚 水稻 安全性 耐药性水稻 敏感性水稻 

分 类 号：S451.21[农业科学—植物保护]