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为研究河南省银杏雄株的开花生物学特性,对14株百年以上的银杏古树的开花时间、花穗长、花穗宽、单穗花药数、花粉长、花粉宽等指标进行了调查分析。结果表明:银杏古树雄株开花时间一般从3月底到4月中旬,花期3~7d不等;14个银杏古树雄株花穗长在21.33~31.36mm,平均为27.74mm;花穗宽5.81~7.90mm,平均为6.94mm;单穗花药数在39.80~56.17,平均为50.15个;花粉长在30.05~34.66μm,平均为33.47μm;花粉宽在13.93~17.73μm,平均为15.32μm。方差分析结果表明,不同雄株间在花穗长、花穗宽、单穗花药数、花粉长、花粉宽均存在极显著差异。
In order to study the flowering biological characteristics of the male plant of Ginkgo biloba in Henan province, the flowering time, length of flower spike, flower spike width, number of single spike flower, pollen length and pollen width of 14 old ginkgo trees over 100 years were investigated . The results showed that the flowering time of the male tree of Ginkgo biloba was generally from the end of March to the middle of April, and the flowering period varied from 3 days to 7 days. The flower length of the 14 ancient Ginkgo trees was 21.33-31.36 mm, with an average of 27.74 mm. 5.81 ~ 7.90mm, with an average of 6.94mm. The number of single-spike anthers was from 39.80 to 56.17 with an average of 50.15. The pollen length was from 30.05 to 34.66μm with an average of 33.47μm and the pollen width was from 13.93μm to 17.73μm with an average of 15.32μm. Analysis of variance showed that there were significant differences among different male plants in terms of flower length, width of spikes, number of single-spike anther, pollen length and pollen width.