摘要
比较稗草(Echinochloa crusgalli)、马唐(Digitaria sanquinalis)、苋菜(Amaranthusretroflexus)3种杂草受风作用前后植株上的种子量结果发现,受风作用后比受风作用前种子量显著降低,说明3种杂草植株种子被风吹移动;若将受风作用植株周围50cm内的种子量加进去,仍未改变结果,说明种子被风吹移动至50cm之外;置于室外离3种自生杂草发生区10m以外的空白土壤,2年后发现空白土壤新生杂草中有马唐、稗草、苋菜植株和种子存在。1995年10月至翌年3月于中国农业大学科学园休闲地进行了20次在4级以上的风速中粘截杂草种子试验,截获了稗草、马唐、苋莱3种杂草种子。
The experiment was conducted in China Agricultural University from 1994 to 1998 to investigate the movement of the seeds of Redroot Amaranth, Common Crabgrass, Barnyardgrass under wind force. The results showed that almost all seeds of one plant for the three kinds of weed were moved to 50cm away under winds force not less than 4 grade. Soil ,treated under 120℃ for 24 hours and then put in a 50cm wide,50cm long,5cm high box placed 10m far from these three kinds of living weed outdoor,got new seedling and extra seeds of these three kinds of weed seed three years later. Capturing-test in field showed that wind was one of driving forces for the movement of the seeds of Redroot Amaranth,Common Crabgrass,Barnyardgrass.
出处
《生态农业研究》
CSCD
2000年第2期51-53,共3页
Chinese Journal of Eco-agriculture
基金
"九五"国家科技攻关项目部分研究内容
关键词
杂草种子
受风移动
Weed seed,Movement under wind force,Characteristics
