【作者】 李善林； 倪汉文； 张丽；

【Author】 Li Shanlin;Ni Hanwen;Zhang Li;Department of Agronomy,China Agricultural University;

【机构】 中国农业大学农学系；

【摘要】 于1996~1998年在北京测定用标记种子研究稗草、马唐和反枝苋在休闲地、马路和草坪不同生境及在不同高度时被风作用后移动距离。结果表明在休闲地,半年后稗草、马唐和反枝苋种子的最大移动距离分别不小于为3m、10m和6m;在平坦的马路上,在一场5级风24h后,三种杂草移动最远距离不小于1km。在风速为6~12m/s时,在1.0m高处的稗草和反枝苋种子和在高度0.5m处的马唐种子的移动不小于3.0m。更多还原

【Abstract】 Movement distances of seeds of barnyaxdgrass,common crabgrass,and redroot amaranth in different Niches and at different heights were determined using marked seeds in 1996- 1998.The results showed that the maximum distances of seeds movements of bamyardgrass,common crabgrass,and redroot amaranth in fallow fields and turf were not less 3,10,6m,respectively,half year later and on an even road not less 1 km 2 hrs later after weeding at grade 4.Seeds of bamyardgrass at 1m high,common crabgrass at 0.5 high,and redroot amaranth at lm high could be moved 3m away when the speed of wind was at 6- 12m/s.更多还原