摘要
研究了呼伦贝尔沙地樟子松天然林自然落种及其种子萌发特征,结果表明:丰年期落种器共接到99粒种子,且集中分布在母树的正东、东北侧,欠年期则接到落种42粒且集中分布在正东、东南侧。丰年期不同方位、不同落种距离接到的种子平均发芽率为54.5%,欠年期为28.6%。樟子松林缘落种的传播距离范围可以达到25 m,并且在林缘外5 m范围内种子数量最多,林缘外5～20 m范围平均发芽率为60.9%。樟子松单株树木下土壤种子库中种子数量在4 m处最高,并且随着距树干距离的增加种子数量也随之降低,种子总数由2 m处样方的16粒降低到10 m处样方的7粒,降低百分率达129%。
Through the research on the features of natural falling seeds and germination for Pinus sylvestris var.mongolica natural forest in Hulunbeier Sandy Land,the results show that in abundant year,99 seeds can be gathered mainly distributing at the east and northeast side of mother tree,and in lean year,42 seeds can be gathered mainly distributing at the east and southeast side of mother tree.In abundant year,the mean seed germination at different position and falling distance is 54.5%,and the one in lean year is 28.6%.The farest range for falling seeds can reach 25 m at the forest edge of Pinus sylvestris var.mongolica,which the seeds mostly fall at the range of 5 m,and the mean germination is 60.9% at the range of 5~20 m.In the soil seed pool under single mother tree of Pinus sylvestris var.mongolica,the quantity of seeds is the highest at 4 m,which decrease with the increase of distance from the tree.There are 16 seeds at 2 m and 7 seeds at 10 m,with the decreasing range reaching to 129%.
出处
《内蒙古林业科技》
2012年第1期18-22,共5页
Journal of Inner Mongolia Forestry Science and Technology
基金
内蒙古科技厅创新资金项目(呼伦贝尔沙质草原风蚀坑防治技术研究)
内蒙古自然科学基金项目(2010MS0518
2011MS0518)资助
关键词
呼伦贝尔沙地
天然樟子松林
自然落种
Hulunbeier Sandy Land
Pinus sylvestris var.mongolica natural forest
natural falling seed
