水稻移栽密度和早期水管理对无芒稗生态控制效果的影响

Effects of rice transplanting density and early irrigation management on barnyardgrass ecological control.

在 5 0株·m-2 无芒稗的干扰下 ,杂交水稻Ⅱ优 2 0 70移栽密度 1 9 8cm× 2 6 4cm处理对无芒稗的生态控制效果显著高于较稀密度的 1 9 8cm× 4 6 2cm ,无芒稗颖果减少 71 %。移栽密度 1 9 8cm× 2 6 4cm保证了较高的水稻有效穗和千粒重 ,比移栽密度 1 9 8cm× 4 6 2cm的水稻增产 1 3 3%。早期深水灌溉能有效控制萌芽期的无芒稗 ,但不能防治

The ecological control of hybrid rice Ⅱyou 2070 on barnyardgrass ( Echinochloa crusgalli ), with interference density 50 plants·m -2 mixture planted with rice, and transplanting density 19 8 cm×26 4 cm was higher than that of with transplanting density 19 8 cm×46 2 cm, resulting in barnyardgrass grain husk number reduce by 71%. Hybrid rice Ⅱyou 2070 with transplanting density 19 8 cm×26 4 cm ensured the higher effective panicle numbers and 1000 grain weight and the rice yield of which was 13.3 % higher than that of with rice transplanting density 19 8 cm×46 2 cm. Barnyardgrass could be controlled by deep water at its early stage. However, it appeared that barnyardgrass could not be controlled effectively by deep water when its seedling age was older than 3 leaf stage.