摘要
为了研究不同地区银杏古树雄株的开花生物学特性,对中国主要银杏产区的33棵百年以上的银杏古树进行了调查分析,包括开花时间、2～4年生具花短枝上花穗数、花穗长、花穗宽、单个银杏花穗上的花药个数。研究结果表明:2006年银杏古树雄株开花时间从3月底到4月中旬,花期3～7天不等,从南到北相继开花;33个银杏古树雄株2～4年生具花短枝上花穗数从3.1～6.02个不等,平均为4.53个;花穗长在16.55～32mm,平均为25.25mm;花穗宽5.2～8.19mm,平均为6.83mm;单个银杏花穗上的花药个数在36.68～73.26个,平均为50.31个。分析结果表明,不同雄株间在开花时间、2～4年生具花短枝上花穗数、花穗长、花穗宽、单个银杏花穗上的花药个数存在显著差异。
To study the flowering biological character of ancient male ginkgo trees in the different areas, this paper has investigated and analyzed 33 ancient male ginkgo trees which came from main distribution areas of Ginkgo boliba L. in China, including the flowering period, the number of flower spikes on short shoot, the length of flower spikes, the width of flower spikes, the anther number of flower spikes. The results showed that the flowering period of male ginkgo trees ranged from late March to middle April and flowering lasted for 3-7 days from south to north in 2006; the number of flower spikes on short shoot of 33 ancient male ginkgo trees ranged from 3.1 to 6.02 per shoot and the average number was 4.53 per shoot; the length of flower spikes ranged from 16.55 mm to 32 mm and the average number was 25.25 mm; the width of flower spikes ranged from 5.2 mm to 8.19 mm and the average number was 6.83 mm; the anther number of flower spikes ranged from 36.68 to 73.26, and the average number was 50.31. The results indicated that there were significant differences among trees in the flowering period, the number of flower spikes on short shoot, the length of flower spikes, the width of flower spikes, and the anther number of flower spikes of ancient male ginkgo trees.
出处
《中国农学通报》
CSCD
2013年第22期1-5,共5页
Chinese Agricultural Science Bulletin
基金
河南省科学技术攻关项目"特用经济林树种良种选育和定向培育技术研究"(122102110156)
河南省教育厅科学技术研究重点项目"河南省古银杏孢粉学分类研究"(13A180349)
关键词
银杏
开花物候期
花穗
Ginkgo boliba L.
flowering phenology
flower spikes
