J Integr Plant Biol. ›› 1991, Vol. 33 ›› Issue (10): -.

• Research Articles •    

On Dispersal Efficiency of Picea Pollen

Li Wen-yi   

Abstract: 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 150Km. Only when the Picea pollen content is higher than 15%, can ir 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 Picca pollen. The dispersal pattern for Pious, Abies and Picea are different.

Key words: Picea pollen: Pollen dispersal, Dispersal distance

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