草坪恶性杂草蟋蟀草的发生生物学——蟋蟀草发生对播期的反应

Emergence Biology of Goosegrass Wiregrass——Emergence of Goosegrass Wiregrass Response to Sown stage.

在北京地区蟋蟀草从 5月开始发生 ,可以持续到 10月底 ,6月、7月出土速率和出土率强于其它月份 ,9月后出土率显著下降 ;5～ 10月期间生长的蟋蟀草 ,其种子与植株的生物学产量比率为 5～ 7的值占 64%。脱离母株的蟋蟀草种子当月存在萌发力 ,半年后萌发率达到 60 %。

Goosegrass wiregrass, growing in turfgrass, can emerge from May to Oct. of each year, its emergence speed and ratio are prefer in both July and June to other growing seasons and decrease after September. Weight ratio between seed and whole plant of Groosegrass wiregrass growing during whole growing season is 64%. The seed harvested in a month can germinate and the emergence rate can get to 60% in 6 month later.