除草剂莠去津对草地早熟禾草坪除草效果的影响

Influence of Herbicide Atrazine on Weeding Effect of Poa pratensis L. Lawn

应用田间试验的方法,采用4个梯度的化学除草剂莠去津(Atrazine)以0.10(PA)、0.15(PB)、0.20(PC)、0.23g/m2(PD)用于草地早熟禾草坪。结果表明:随着药剂浓度的增加,对杂草的相对鲜重及相对密度防效呈上升趋势。喷药0～28d,莠去津的除草效果最为理想;施药56d后,4组莠去津处理对杂草的相对密度防效及相对鲜重防效均达到了70%以上,4组处理中以0.23、0.20g/m2除杂效果最佳,与其它处理有显著差异。

Atrazine with four gradients, namely 0.10 g/m^2（PA）, 0. 15 g/m^2（ PB ）, 0.20 g/m^2（PC） and 0.23 g/m^2 （PD）, was used to weed Poa pratensis L. lawn. Results showed that with concentration increasing, the preventing effect on relative fresh weight and relative density of weeds showed an increasing tendency. The preventing effect of atrazine on weeds was the best within 28 days after spraying, and the preventing effects for the four treatments all reached above 70% after 56 days. Among the four treatments, the preventing effect of PC and PD was better than that of the others.