【摘要】 通过田间试验,观察56%二甲四氯钠粉剂茎叶处理对水稻田杂草鸭舌草Monochoria vaginalis(Burm.F.)、异型莎草Cyperus difformis L.和鳢肠Eclipta prostrata L.的防除效果,并测定杂草中水分和养分的含量,分析杂草防除对水稻田养分、水分和水稻产量的影响。结果表明:56%二甲四氯钠粉剂能有效控制稻田草鸭舌草、异型莎草和鳢肠3种杂草的危害,施药后40 d的密度防效和鲜质量防效分别为85.50%～94.48%和88.20%～94.87%;施用56%二甲四氯钠粉剂能降低杂草对田间养分和水分的吸收,从而提高水稻的产量。更多还原

【Abstract】 In this paper,56% MCPA-Na SP(2-methyl-4-chloro-phenoxyacetic acid-Na salt powder) was applied to investigate the control effects of Monochoria vaginalis(Burm.F.),Cyperus difformis L.,Eclipta prostrata L.and the influence of weed control on nutrition and crop yield of rice.The results showed that 56% MCPA-Na SP had good control effects on broadleaves and sedge weeds.The overall quantitycontrol effects reached 85.50%-94.48% and the overall fresh control effects reached 88.20%-94.87%.The application of 56% MCPA-Na SP significantly reduced the weeds absorption of nutrition and water,resulting in prominent yield enhancing.更多还原