二甲四氯·氯氟吡氧乙酸防除稻田空心莲子草和异型莎草的效果

摘要

试验研究了30％二甲四氯·氯氟吡氧乙酸WP防除水稻移栽田空心莲子草和异型莎草的效果,并测定了处理后对杂草、氮、磷、钾、水分及水稻产量的影响.结果表明,30％二甲四氯·氯氟吡氧乙酸WP对移栽稻田空心莲子草和异型莎草有良好的防除效果,施药后45 d的密度防效和鲜重防效均在93％以上.施用30％二甲四氯·氯氟吡氧乙酸WP能有效降低杂草对田间氮、磷、钾和水分的吸收,水稻增产效果明显.%Trials were conducted to evaluate the effects of wettable powder mixed with methoxone and fluroxypyr-methyl for controlling of Alternanthera philoxeroides(Mart.) Griseb. And Cyperus difformis L. And the variety discipline of the absorption of nitrogen, phosphorus, kalium and moisture and yield were determined after the application. The results showed that 30% methoxone + fluroxypyr-methyl had good control effect against A. philoxeroides and C. difformis. 45 days after the application, the density control rate and fresh control rate were both higher than 93.68%. The application of 30% methoxone + fluroxypyr-methyl could effectively reduce the absorption of nitrogen, phosphorus, kalium and moisture of weed while significantly increase the yield of rice.