CAJ | 학술논문

选用具有化感特性的水稻品系华抗草78和长江流域地区主栽的扬稻6号,通过田间试验研究水稻化感作用结合苄嘧磺隆使用及水层管理对水稻田杂草的抑制作用,旨在降低水稻田化学除草剂使用量,探索水稻生产中杂草治理的新途径.结果表明,水稻化感作用结合深水层可有效抑制稗草的萌发和生长,同时水稻移栽后6 d使用苄嘧磺隆(30 g/hm~2)单剂处理,明显地抑制了异型莎草和陌上菜的萌发数量和生物量积累;水稻移栽后50 d,华抗草78和扬稻6号对稗草的干重防效分别为89.16%和81.86%,对异型莎草的干重防效分别为83.56%和84.93%,对陌上菜十重防效分别为95.22%和88.04%,对这3种杂草的总干重防效分别为87.68%和82.69%:10cm深水层及施用苄嘧磺隆单剂条件下2个水稻品种(系)的产量比5 cm水层、不施化学除草剂的处理分别增产40.33%和21.36%.水稻化感品种对稗草等的抑制作用、水稻自身的竞争作用、10 cm深水层及苄嘧磺隆单剂这4种因素的综合效应不仅具有良好的控草效果,增产显著,而且明显降低了除草剂的使用量.
선용구유화감특성적수도품계화항초78화장강류역지구주재적양도6호,통과전간시험연구수도화감작용결합변밀광륭사용급수층관리대수도전잡초적억제작용,지재강저수도전화학제초제사용량,탐색수도생산중잡초치리적신도경.결과표명,수도화감작용결합심수층가유효억제패초적맹발화생장,동시수도이재후6 d사용변밀광륭(30 g/hm~2)단제처리,명현지억제료이형사초화맥상채적맹발수량화생물량적루;수도이재후50 d,화항초78화양도6호대패초적간중방효분별위89.16%화81.86%,대이형사초적간중방효분별위83.56%화84.93%,대맥상채십중방효분별위95.22%화88.04%,대저3충잡초적총간중방효분별위87.68%화82.69%:10cm심수층급시용변밀광륭단제조건하2개수도품충(계)적산량비5 cm수층、불시화학제초제적처리분별증산40.33%화21.36%.수도화감품충대패초등적억제작용、수도자신적경쟁작용、10 cm심수층급변밀광륭단제저4충인소적종합효응불부구유량호적공초효과,증산현저,이차명현강저료제초제적사용량.
Field experiments were conducted to examine integrated inhibition of allelopathic rice(Huakangcao 78).bensulfuron methyl application and water nmnagement on weeds in paddy field,with the purposes of attempting to reduce the dosage of herbicide applied in rice field and exploring new ways of weed management in rice production.The results showed that allelopathic rice could inhibit the germination and growth of barnyardgrass[Echinochloa crusgalli(L.)Beauv ] effec-tively,and bensulfuron methyl(30 g/hm~2)applied 6 d after rice transplanting could significantly reduce the plant nnm-bets and biomass accumulation of difformed galingale(Cyperus difformis L.)and procumbent falsepimperne[Lindernia procumbens(Krock.)Philcox].The control efficiency of Huakangcao 78 and Yangdao 6 were 89.16% and 81.86% on bamyardgrass dry weight respectively 50 d after the rice transplanting,83.56% and 84.93% on difformed galingale dry weight,95.22%and 88.04% on procumbent falsepim-peme dry weight.As a whole,the total dry weight control efficiency were 87.68% and 82.69% on above weeds corre-spondingly.Moreover,the grain yield of Huakangcao 78 and Yangdao 6 under the condition of 10 cm deptll water and her-bicide application increased 40.33% and 21.36% comparing those under the treatment of 5 cm depth water and no herbicide application respectively. Synergistic actions of allelochemi-eals, rice competitiveness, 10 cm depth water and herbicide had the advantages of better control effect on the weeds, highergrain yield of rice and distinct lower herbicide dosage.