The Pattern of Seed Rain in the Broadleaved-Korean Pine Mixed Forest of Xiaoxing'an Mountains, China

초록

This study was conducted to understand the pattern and characteristics of sed rain in thebroadleaved-Korean pine mixed forest. We established 287 0.5 m2 circular seed traps and collected andidentified fallen seeds in the traps every two weeks in 150 m×150 m sample plot of the permanent ninehectare of experimental plot in 2005. The overall average density of seed rain was 864.2/m2. The seeds ofBetula costata2 (78.2%), followed by Abies nephrolepisas 57.5/m2, B. platyphylla as 37.9/m2, Tilia amurensis as 32.2/m2, Acer ukurunduense as 17.0/m2, A.tegmentosum 14.8/m2, and so on. Pinus koraiensis was recorded only 2.5/m2 of fallen seeds mainly owingof Korean pine had low rate of purity due to the animal and microbiological predation. Most of seeddispersal have started from the midle to late August and come to an end on the midle of November. Thepeak time of seed dispersal varied depending on the species. The rate of pure seed by dispersal time variedaccording to the species, thereupon the aspect of predation and the rate of blasted seed which had influenceon the rate of purity also varied according to the species. The density of Korean pine seed rain in the forestgap was significantly diferent at P≤0.05 from in the closed canopy. But the other species had no

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