摘要
该研究通过调查樟子松子代测定林在不同年份、不同立地条件、不同家系植株雌花量,探讨了樟子松雌花量与立地条件及不同家系之间的关系,以期为后期开展樟子松开花结实综合技术研究及良种选育奠定基础。结果表明:(1)樟子松雌花开花量受立地条件和不同年份的影响显著。(2)樟子松大小年现象非常明显,平均雌花量大年是小年的8.374倍,而这种差异随着立地条件的不同会更加明显,阳坡单株雌花量最多,其次是沟堂,阴坡最少。(3)在开花大年,不同家系之间雌花量存在显著差异。(4)而在小年,各立地条件下各家系雌花量均受到很大影响,尤其是在阴坡,各家系雌花量几乎没有,导致当年结实率接近于零。
Through the investigation on the number of pistillate flowers of different families ofPinus sylvestris var. mongolica in different years and different site conditions,the results showed that the number of pistillate flowers was significantly affected by site conditions and different years. The average number of pistillate flowers in 2019 was 8.374 times that in 2021. The difference became more obvious with the different site conditions.The number of pistillate flowers per plant was the most on the sunny slope,followed by the ditch and pond,and the least on the shady slope. In the flowering year,there was a significant difference in the number of pistillate flowers among different families. In the small year,the number of female flowers of each family was greatly affected under various site conditions,especially on the shady slope. The number of pistillate flowers of each family was almost zero, resulting in a seed setting rate close to zero. In this study, the relationship between the number of pistillate flowers,site conditions and different families ofPinus sylvestrisvar. mongolica was preliminarily investigated,which laid a foundation for the later research on comprehensive techniques of flowering and fruiting ofPinus sylvestrisvar. mongolica and the breeding of improved varieties.
作者
辛向军
孟宪勇
袁德水
党磊
XIN Xiang-jun;Meng Xian-yong;YUAN De-shui;DANG Lei(Shibalitai Forest Farm,Longhua State-owned Forest Farm Management Office of Hebei Province,Longhua,Hebei 068150;Hebei Paddock State-owned Forest Farm,Chengde,Hebei 068450;Hebei Academy of Forestry and Grassland Science,Shjiazhuang,Hebei 050061;Hebei Technical Innovation Center of Improved Tree Species,Shijiazhuang,Hebei 050061)
出处
《河北林业科技》
2022年第4期38-40,共3页
Journal of Hebei Forestry Science and Technology
基金
河北省重点研发项目“河北省主要针叶树种落叶松和樟子松种质资源收集与创新”(20326333D)。
关键词
雌花
立地条件
家系
樟子松
pistillate flower
site conditions
family
Pinus sylvestris var.mongolica
