CAJ | 학술논문

田间调查表明，早稻直播田发生的杂草有41种，分属21个科。其中稗草为优势种，田间出现频度为100％，二级以上危害田块占56．4％。局部农区优势种为水莎草或千金子，发生密度高，危害严重。早稻直播田出草顺序依次为稗草、牛毛毡、千金子、矮慈菇、节节菜、鸭舌草、丁香蓼等。稗草出草高峰在水稻播种后5～15 d，其它杂草出草高峰在水稻播后10～20d，25d后杂草停止出苗。播种当天或播后4 d内采用40％直播净675～900g／hm2，对稗草、千金子有特效，总体除草效果可达95％以上。对水竹叶、双穗雀稗较多田块，采用10％农美利295～300ml／hm2，防除效果达90％以上。
전간조사표명，조도직파전발생적잡초유41충，분속21개과。기중패초위우세충，전간출현빈도위100％，이급이상위해전괴점56．4％。국부농구우세충위수사초혹천금자，발생밀도고，위해엄중。조도직파전출초순서의차위패초、우모전、천금자、왜자고、절절채、압설초、정향료등。패초출초고봉재수도파충후5～15 d，기타잡초출초고봉재수도파후10～20d，25d후잡초정지출묘。파충당천혹파후4 d내채용40％직파정675～900g／hm2，대패초、천금자유특효，총체제초효과가체95％이상。대수죽협、쌍수작패교다전괴，채용10％농미리295～300ml／hm2，방제효과체90％이상。
Results of our investigation showed that there are 41 species of weeds belonging to 21 families in the fields of early direct seeded rice in Jinhua,Zbejiang. Among them, Echinochloa crusgalli is the most important species with 100% of frequency and 56.4% of damage more than the 2nd grade, while in some regions Juncellus serotinus and Leptochloa chinensis are superior to other weeds. The time order for germination of weeds in fields is E. crusgalli, Eleocharis yokoscensis, L. chinensis, Sagittaria pygrnaea, Rotalaindica, Monochoria vaginalis, Ludwigia prostrata. Bamyardgrass has a peak for germination at 5 - 15 d after rice seeded,other weeds at 10- 20 d, and all weeds stop to emergence at 25 d. 40% pretilachlor + bensulfuron-methyl WP used at the dosage of 675 - 900 g/hm2 at 0 or 4 d after rice seeded is very effective on E. crusgalliand L. chinensis, with more than 95% of total efficacy. For Murdannia triquetra and Paspalum distichum, 10% Nominee (bispyribacsodium) SC 225 - 300 ml/hm2 is applied and has more than 90% of the effect.