摘要:研究了16.5%丙草胺·西草凈EC防除水稻移栽田稗草、眼子菜和鴨舌草的效果,并測(cè)定了雜草對(duì)氮、磷、鉀和水分的影響以及水稻產(chǎn)量的影響。結(jié)果表明,16.5%丙草胺·西草凈EC對(duì)水稻移栽田的主要雜草具有良好的防治效果,有效成分用量為429~1 056 g/hm2的16.5%丙草胺·西草凈EC綜合密度防效和綜合鮮重防效分別為86.09%~99.58%、87.81%~99.42%,顯著優(yōu)于對(duì)照藥劑30%丙草胺EC和25%西草凈WP。16.5%丙草胺·西草凈EC施用后,增產(chǎn)效果總體優(yōu)于對(duì)照藥劑,在水稻移栽田具有良好的推廣前景。
關(guān)鍵詞:丙草胺·西草凈;水稻移栽田;雜草防效;養(yǎng)分;水分;產(chǎn)量
中圖分類號(hào):S451.21;S482.4 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):0439-8114(2011)19-3971-03
Effects of 16.5% Emulsifiable Concentrate Mixed with Pretilachlor and Simetryn for Control of Weeds in Transplanted Rice Fields
ZHU Wen-da1,WU Zhi-feng2,WANG Jing1,YUAN You-ming1
(1. Hubei Academy of Agricultural Sciences, Wuhan 430064,China;
2. Insititute for the Control of the Agrichemicals, Ministry of Agriculture, Beijing 100026,China)
Abstract: Trials were conducted to evaluate the effects of emulsifiable concentrate mixed with pretilachlor and simetryn for control of Echinochloa crusgalli(L.) Beauv, Potamogeton crispus and Monochoria vaginalis(Burm. F.) and crop yield, as well as the variety discipline of the absorption of nitrogen, phosphorus, kalium and moisture. The results showed that 16.5% pretilachlor+simetryn EC had good control of the main weeds in transplanted rice fields. The overall density control effects and fresh control effects were 86.09%~99.58% and 87.81%~99.42%, which was siginificantly higer than 30% pretilachlor EC, 25% simetryn WP. The application of 16.5% pretilachlor+simetryn EC siginificantly increased the yield of rice which was better than those control herbicides. It has good application prospects in transplanted rice fields.
Key words: pyrazosulfuron+simetryn; transplanted rice field; weed control; nutrient; moisture; yield
丙草胺為芽前除草劑,主要用于防除禾本科雜草,屬于2-氯化乙酰替苯胺類除草劑,是細(xì)胞分裂抑制劑,用于土壤處理可防除稻田禾本科雜草、部分一年生莎草科雜草和闊葉雜草。西草凈難溶于水,易溶于有機(jī)溶劑,是內(nèi)吸選擇性除草劑,能通過(guò)根、葉吸收并傳導(dǎo)至全株,對(duì)稻田惡性雜草眼子菜有特效,對(duì)早期牛毛草有顯著效果。適用于稻田防除牛毛草、眼子菜、澤瀉、野慈姑、母草、小慈姑等雜草,對(duì)稗草也有一定的效果。本試驗(yàn)旨在研究殺草譜不同的丙草胺和西草凈復(fù)配后對(duì)水稻移栽田的除草效果,雜草防除后的水稻產(chǎn)量以及雜草的氮、磷、鉀和水分含量的變化規(guī)律。
1材料與方法
1.1材料
水稻品種為粳拋1號(hào)。
供試藥劑如下:①16.5%丙草胺·西草凈EC (東部韓農(nóng)(黑龍江)化工有限公司);②30%丙草胺EC(先正達(dá)(蘇州)作物保護(hù)有限公司);③25%西草凈WP(吉林金秋農(nóng)藥有限公司)。……