摘要
兴安落叶松(Larix gmelinii)是我国东北林区主要造林树种,具有抗性强、材质优的特点,但该树种树龄达到30 a以上时结实困难或种子空粒现象较多,严重影响着种子园和母树林种子的生产。本研究以乌尔旗汉兴安落叶松国家级林木良种基地(初级种子园)3个种源12个无性系为材料,对种子园所选无性系花粉活力进行了测定,结果表明,兴安落叶松不同种源和不同无性系间花粉失活率有显著差异,优树起源、林龄、林分立地类型及管理技术均会影响花粉生活力。本研究初步探讨了种子园母树不结实的原因,旨在为提高兴安落叶松种子园经营管理水平提供技术支撑。
Larix gmelinii is a major afforestation species in the northeastern forest regions of China,characterized by strong resistance and excellent wood quality.However,when trees of this species reach over 30 years old,difficulties in fruiting or a high incidence of empty seeds can significantly affect the production of seeds in seed orchards and mother forests.This study used 12 clones from three provenances in the National Tree Seed Base of Larix gmelinii(primary seed orchard)in Wuliji Han as materials to determine the pollen viability of selected clones in the seed orchard.The results indicated that there were significant differences in pollen inactivation rates among different provenances and clones of Larix gmelinii.The origin of superior trees,stand age,forest site type,and management techniques all affect pollen viability.This study preliminarily explored the reasons for the lack of fruiting in mother trees of the seed orchard,aiming to provide technical support for improving the management level of Larix gmelinii seed orchards.
作者
孙桂芳
SUN Guifang(Wuliji Han National Tree Seed Base of Dahurian Larch,Yakeshi 022159,Inner Mongolia,China)
出处
《内蒙古林业调查设计》
2024年第1期53-55,97,共4页
Inner Mongolia Forestry Investigation and Design
