摘要
根据对内蒙锡林河流域及新疆天山地区四个云杉(picea)林及林外150km距离内的表土取样,进行云杉花粉粒散播的数最规律及其机制的试验研究。工作表明,在云杉林内,云杉花粉含量至少为总数的一半,其最高值达80%以上。在林外30m,云杉花粉占30%以上。而500m以外即可能降低至1%。但在距云杉林150km范围内,均有云杉花粉出现。只有在云杉花粉的含量大于15%时,才表明数十米范围内有云杉生长。文中讨论了风速和风向及地形因素对于云杉花粉传播数量和距离的影响。作者认为,云杉、松(Pinus)和冷杉(Abies)花粉的传播效率是不同的。
To learn the dispersal efficiency of picea pollen, surface samples was collected from four Picea forests and adjacent areas in Nei Monggol and Xinjiang Autonomous regions. In the Picea forests at least half and up to 80% of the pollen are of Picea, whereas it is 30% 30 meters away from the forests. In a distance of 500 meters from the margin of the Picea forest it could be as low as 1%. However it also scatters within a radius at least l50Km. Only when the Picea pollen content is higher than 15%, can it indicate the growth of Picea within an area of dozens of kilometers. Wind velocity and direction as well as the topographic conditions are also important factors affecting dispersal efficiency of Picea pollen. The dispersal pattern for Pi-nus, Abies and Picea are different.
关键词
云杉
花粉
传播
Picea pollen
Pollen dispersal
Dispersal distance
