Analysis on the variation of female-male flowers and strobilus production of clonal seed orchard of pinus tabulaeformis carr .

油松无性系种子园雌雄球花量及球果量变异分析。

It lasted for more than four months from initiation of the ovulate strobilus to formation of anatropous ovules .

从雌球果原基发生到胚珠分化历时4个多月。

The sub-tropical winter weather has no apparent inhibition for the growth and development of the ovulate strobilus in pinus massoniana .

亚热带的冬季气候对马尾松雌球果的生长发育没有明显的抑制作用。

Result is as follows : in the middle of october , the primordium of ovulate strobilus occurred , its occurrence time varied between different-aged ramets and different occurrence part .

结果表明：雌球果原基发生时间为10月中旬，不同的树龄和着生部位，其发生时间不同。