【目的】研究丙炔氟草胺与二甲戊灵混配剂的除草作用及对棉花的安全性,为新疆棉田杂草防除系统提供新方案。【方法】以二甲戊灵为参比对照,通过田间药效试验方法测定丙炔氟草胺单剂、丙炔氟草胺·二甲戊灵混配剂对棉田杂草的控制作...【目的】研究丙炔氟草胺与二甲戊灵混配剂的除草作用及对棉花的安全性,为新疆棉田杂草防除系统提供新方案。【方法】以二甲戊灵为参比对照,通过田间药效试验方法测定丙炔氟草胺单剂、丙炔氟草胺·二甲戊灵混配剂对棉田杂草的控制作用,评价药剂对棉花的安全性。【结果】34%丙炔氟草胺·二甲戊灵乳油在剂量175~200 mL/667 m 2下对3种杂草的效果均较好,与对照药剂42%丙炔氟草胺悬浮剂相比,无显著差异,与对照药剂33%二甲戊灵乳油相比,优于该药剂。【结论】丙炔氟草胺·二甲戊灵混配剂的阔叶杂草的防除效果优于二甲戊灵,对棉花安全,可在新疆地区进行推广使用。展开更多
Goosegrass is one of the worst agricultural weeds on a worldwide basis. Understanding of its interference impact in crop ifeld wil provide useful information for weed control programs. Field experiments were conducted...Goosegrass is one of the worst agricultural weeds on a worldwide basis. Understanding of its interference impact in crop ifeld wil provide useful information for weed control programs. Field experiments were conducted during 2010–2012 to determine the inlfuence of goosegrass density on cotton growth at the weed densities of 0, 0.125, 0.25, 0.5, 1, 2, and 4 plants m–1 of row. Seed cotton yield tended to decrease with the increase in weed density, and goosegrass at a density of 4 plants m–1 of row signiifcantly reduced cotton yields by 20 to 27%. A density of 11.6–19.2 goosegrass plant m–1 of row would result in a 50%cotton yield loss from the maximum yield according to the hyperbolic decay regression model. Bol production was not affected in the early growing season. But bol numbers per plant were reduced about 25%at the den-sity of 4 plants m–1 of row in the late growing season. Both cotton bol weight and seed numbers per bol were signiifcantly reduced (8%) at 4 goosegrass plants m–1 of row. Cotton plant height, stem diameter and sympodial branch number were not affected as much as cotton yields by goosegrass competition. Seed index, lint percentage and lint ifber properties were unaffected by weed competition. Intraspeciifc competition resulted in density-dependent effects on weed biomass per plant, 142–387 g dry weight by harvest. Goosegrass biomass m–2 tended to increase with increasing weed density as indicated by a quadratic response. The adverse impact of goosegrass on cotton yield identiifed in this study has indicated the need of effective goosegrass management.展开更多
[目的]明确氟啶草酮和扑草净混用后防除棉田杂草的应用潜力。[方法]采用室内盆栽法测定了氟啶草酮和扑草净不同配比组合对棉田恶性杂草龙葵的联合作用,并评价了混配的田间应用效果。[结果]氟啶草酮和扑草净混配对棉田龙葵的联合作用以...[目的]明确氟啶草酮和扑草净混用后防除棉田杂草的应用潜力。[方法]采用室内盆栽法测定了氟啶草酮和扑草净不同配比组合对棉田恶性杂草龙葵的联合作用,并评价了混配的田间应用效果。[结果]氟啶草酮和扑草净混配对棉田龙葵的联合作用以增效作用为主,其中2者质量比在1∶5.76时增效作用最为明显;氟啶草酮和扑草净田间在(144+825) g a.i./hm2剂量下对棉田杂草防效较好,防效可达90.5%以上。[结论]氟啶草酮和扑草净混用对棉花安全,且对棉田杂草防效较高,能降低后茬作物安全性风险,有较好的应用前景。展开更多
文摘【目的】研究丙炔氟草胺与二甲戊灵混配剂的除草作用及对棉花的安全性,为新疆棉田杂草防除系统提供新方案。【方法】以二甲戊灵为参比对照,通过田间药效试验方法测定丙炔氟草胺单剂、丙炔氟草胺·二甲戊灵混配剂对棉田杂草的控制作用,评价药剂对棉花的安全性。【结果】34%丙炔氟草胺·二甲戊灵乳油在剂量175~200 mL/667 m 2下对3种杂草的效果均较好,与对照药剂42%丙炔氟草胺悬浮剂相比,无显著差异,与对照药剂33%二甲戊灵乳油相比,优于该药剂。【结论】丙炔氟草胺·二甲戊灵混配剂的阔叶杂草的防除效果优于二甲戊灵,对棉花安全,可在新疆地区进行推广使用。
基金funded by grants from the National Key Technology R&D Program of China (2012BAD19B05)the Fundamental Research Funds for Central Public Welfare Research Institutes, China (SJB1005)
文摘Goosegrass is one of the worst agricultural weeds on a worldwide basis. Understanding of its interference impact in crop ifeld wil provide useful information for weed control programs. Field experiments were conducted during 2010–2012 to determine the inlfuence of goosegrass density on cotton growth at the weed densities of 0, 0.125, 0.25, 0.5, 1, 2, and 4 plants m–1 of row. Seed cotton yield tended to decrease with the increase in weed density, and goosegrass at a density of 4 plants m–1 of row signiifcantly reduced cotton yields by 20 to 27%. A density of 11.6–19.2 goosegrass plant m–1 of row would result in a 50%cotton yield loss from the maximum yield according to the hyperbolic decay regression model. Bol production was not affected in the early growing season. But bol numbers per plant were reduced about 25%at the den-sity of 4 plants m–1 of row in the late growing season. Both cotton bol weight and seed numbers per bol were signiifcantly reduced (8%) at 4 goosegrass plants m–1 of row. Cotton plant height, stem diameter and sympodial branch number were not affected as much as cotton yields by goosegrass competition. Seed index, lint percentage and lint ifber properties were unaffected by weed competition. Intraspeciifc competition resulted in density-dependent effects on weed biomass per plant, 142–387 g dry weight by harvest. Goosegrass biomass m–2 tended to increase with increasing weed density as indicated by a quadratic response. The adverse impact of goosegrass on cotton yield identiifed in this study has indicated the need of effective goosegrass management.
文摘[目的]明确氟啶草酮和扑草净混用后防除棉田杂草的应用潜力。[方法]采用室内盆栽法测定了氟啶草酮和扑草净不同配比组合对棉田恶性杂草龙葵的联合作用,并评价了混配的田间应用效果。[结果]氟啶草酮和扑草净混配对棉田龙葵的联合作用以增效作用为主,其中2者质量比在1∶5.76时增效作用最为明显;氟啶草酮和扑草净田间在(144+825) g a.i./hm2剂量下对棉田杂草防效较好,防效可达90.5%以上。[结论]氟啶草酮和扑草净混用对棉花安全,且对棉田杂草防效较高,能降低后茬作物安全性风险,有较好的应用前景。
