Abstract:

In order to investigate the species composition, density and vertical distribution characteristics of the soil seed bank of Eucalyptus plantation, the growth of 2-year-old Eucalyptus plantation was researched in comparison with the nearby miscellaneous wood. Through the method of the interior of seed germination and taking their forest soil, the distribution characteristics of Eucalyptus plantation soil seed bank were studied. The results showed that: (1) the rate of seed germination was about the same rule from 7 days begging to enter seed germination peak, 19 days to an end, then germination peak into the slow development to finally stop germination; (2) Eucalyptus plantation’s soil seed banks and seed density largely reserved for 9804 grain/m2 (control for 3614 grain/m2), a total of 15 species, belonging to 9 families, of which the Gramineae cyrtococcum as the dominant species with an seed density of 8849 grain/m2, accounting for 90.26% of total soil seed bank; (3) Seed bank vertical distribution pattern showed that more than 80% of the seeds stored in dead branches of leaves and 0-5 cm of soil. The density characteristics of the soil seed bank of Eucalyptus plantation were larger than the miscellaneous wood, which were mainly the herb and next to the shrub. The seed stored mostly in dead branches of leaves and the surface soils.