中文摘要：

通过定株观察、人工套袋授粉试验等对华北驼绒藜繁育系统进行了研究。结果显示：（1）华北驼绒藜的花粉寿命为6d，花粉胚珠比（P／0）为1351189±391779；自然条件下存在着同株授粉和异株授粉两种方式，但以异株授粉为主，其繁育系统属于兼性异交。（2）华北驼绒藜在有花粉时柱头可授性为6d（柱头露出后5～10d），但在缺乏花粉不能完成授精时，柱头会出现徒长现象，其可授性可以维持12d（柱头露出后9～20d）。（3）人工套袋授粉结果显示，华北驼绒藜最佳授粉时间是柱头露出后6～7d，此时年均授粉结实率最高（94．83％）；在柱头失去过氧化物酶活性时（柱头露出后21d）授粉结实率年均为4．93％；相对于柱头最佳可授期，华北驼绒藜具有较高结实率的授粉时间范围较宽。研究表明，在长期的进化过程中，华北驼绒藜形成了P／O较高、柱头可授性时间长以及在异株授粉优势的情况下，还保留同株授粉方式的生殖补偿机制，对其野生退化群落的种群恢复具有积极的意义。

英文摘要：

Position observation, pollen-ovule ratio and tern of Ceratoides arborescens. The results showed：（ bagged pollination were utilized to study breeding sys- 1）The pollen life was 6 days,and the pollen-ovule was 1 351 189±391 779;there were cross pollination and self-pollination,and cross pollination dominated; the breeding system belonged to facultative xenogamy. （2）The stigma receptivity of C. arborescens was 6 days if existing pollen （5~10 days after stigma exposed） ,than the stigma would be excessive growth;the stigma receptivity was longer in lacking of pollen and can not complete the pollination,may maintain 9~20 d （9~ 20 days after stigma exposed）. （3）Artificial inseminate showed,the best time of inseminate was 6~7 days after stigma exposed,and had highest seed set （94.83~）. The average seed set was 4.93%o after the stigma lose the vitality （21 days after stigma exposed）. Time range that had higher seed set was wider than the best stigma receptivity. It formated reproductive compensation mechanism in the long term evolutionary process：a higher P/O, the stigma receptivity was longer, In the advantage of having cross pollination, it also took self-pollination simultaneous,which is significant for wild population restoration.