【摘要】 运用定位观察、杂交指数、花粉-胚珠比、套袋试验和重力玻片法等方法,对沙芥自然居群和人工栽培种群的开花日动态、繁育系统和传粉习性进行了研究。结果显示:沙芥在自然居群和人工栽培种群开花日高峰分别在19:00和15:00~18:00。沙芥繁育系统为异花授粉植物。沙芥传粉媒介中风的飘移能力非常微弱;沙芥自然居群的访花昆虫有19种,分属于6个目;人工栽培种群的访花昆虫有11种,分属于6个目。意大利蜜蜂、熊蜂、黑带食蚜蝇和拟蜂食蚜蝇是两个居群共有的主要传粉昆虫,在自然居群熊蜂每天的访花频率呈双峰曲线,其中访花最高峰与开花日高峰基本重叠。更多还原

【Abstract】 By field investigation,out crossing index,pollen-ovule ratio and bagged,we studied the blossing diurnal dynamic,breeding system,pollination biology of Pugionium cornutum in the natural populations and the artificial populations.The results showed:P.cornutum reaches its full boom at 18:00～19:00 in the natural populations,while at 15:00～18:00 in the artificial populations.The breeding system of P.cornutum should be a kind of cross-pollinating.Pollen movement is very weak in wind during pollinating.There are 19 insect species flower visitors in the natural populations,which belong to 6 orders.There are 11 species flower visitors in the artificial populations,which belong to 6 orders.Among them,Apis mellifera,Bombus sp.,Episyrphus balteatus and Pseudouolue ellamimica are the main pollinators both in the two populations.Bombus sp.is the highest frequency pollinator in the natural populations.Apis mellifera and Episyrphus balteatus are the highest frequency pollinators in the artificial populations.更多还原