精恶唑禾草灵对粳稻和籼稻生长及保护酶系的影响研究  

Effect of Fenoxaprop-P-Ethyl on Growth and Protective Enzyme System of Japonica and Indica Rice

作　　者：吴仁海[1] 孙慧慧[1] 苏旺苍[1] 鲁传涛[1] 王恒亮[1] 张永超[1] 马毅辉[1] 

机构地区：[1]河南省农业科学院植物保护研究所,河南省农作物病虫害防治重点实验室,河南郑州450002

出　　处：《华北农学报》2013年第5期163-168,共6页Acta Agriculturae Boreali-Sinica

基　　金：公益性行业(农业)科研专项经费资助项目(201203098)

摘　　要：以粳稻(郑稻18)和籼稻(绵优838)为试验材料,采用水培、盆栽及田间试验相结合,研究了水稻不同生育期对精恶唑禾草灵的敏感性及生理反应。在水稻萌发期,精恶唑禾草灵对粳稻和籼稻胚根生长的抑制中浓度(IC50)分别为0.168 7,0.163 7μg/mL,表明二者在芽期对精恶唑禾草灵均较为敏感。在水稻2～3叶期喷施精恶唑禾草灵后15,30 d,籼稻的IC50分别为279.56,173.49μg/mL,而试验剂量下(12.5～400μg/mL)粳稻生长抑制率低于30%,表明粳稻对精恶唑禾草灵有较高的耐药性。在粳稻4～5叶期喷施精恶唑禾草灵,结果显示,18.45 a.i g/hm2剂量对禾本科杂草防除效果较好,且对水稻生长基本没有影响,因此,田间使用精恶唑禾草灵时需要严格控制使用剂量。精恶唑禾草灵对粳稻和籼稻GSH-Px、SOD、CAT、POD等保护酶系的影响各不相同,表明2种水稻在解毒及应对精恶唑禾草灵胁迫机制上存在着差异。Taking Japonica （ Zheng Rice 18 ） and Indica rice （ Mianyou 838 ） as the test material and combining hydroponics,potted plants and field trials ,this study investigated the sensitivity and physiological responses of rice to Fenoxaprop-P-ethyl at different growth stages.In rice germination, the half maximal inhibitory concentration （IC50）of Fenoxaprop-P-ethyl against radicle growth of Japonica and Indica were 0.168 7,0.163 7 μg/mL respec-tively,indicating that both were more sensitive to Fenoxaprop-P-ethyl in the bud stage .For spraying fenoxaprop-P-ethyl in the 2-3 leaf stage,the half maximal inhibitory concentration （ IC50 ） of Fenoxaprop-P-ethyl against Indica rice were 279 .56 ,173 .49 μg/mL for 15 days and 30 days after treatment respectively .In contrast ,under test doses （12.5-400 μg/mL）,the Japonica rice growth inhibition rate was less than 30%,indicating that the Japonica rice possesses higher resistance to Fenoxaprop-P-ethyl.In the field, both the injury effect and herbicidal activity of Fenoxaprop-P-ethyl on Japonica rice in 4-5 leaf stage at various concentrations were evaluated .The result revealed that Fenoxaprop-P-ethyl shows good preventive and controlling ability on grass weed at 18.45 a.i g/ha with no in-hibitory activity on rice growth.However,the dosage must be strictly controlled for the narrow range of application doses.The Fenoxaprop-P-ethyl has different effects on the protective enzyme system in these two types of rice such as GSH-Px,SOD,CAT,POD,indicating the differences for these two types of rice in both detoxification and mecha-nisms of response to the stress upon treatment with Fenoxaprop-P-ethyl.

关 键 词：精恶唑禾草灵 粳稻 籼稻 药害 保护酶系 

分 类 号：S482.4[农业科学—农药学] S511.01[农业科学—植物保护]