Characteristics of Soil Seed Bank of Dianthus versicolor and Their Effects on Seed Germination
In this research,the seed bank of two natural populations of D.versicolor from Xinjiang were studied with methods of field sampling investigation, seed identification and seed germination so as to reveal the relationship between characteristics of soil seed bank of different populations and population regeneration.The results showed that the soil seed bank of D.versicolor population was relatively abundant, with an average density of 50 grains/m2;the seeds of population A mainly existed in the litter layer or the soil layer of 0-2 cm, accounting for 92%,while the seeds of population B chiefly existed in the soil layer of 0-2 cm and 2-4 cm,accounting for 96%.The result of seeds germination test showed that the indoor germination rates of population A and B were significantly higher than their natural germination rates (P<0.01),the natural germination rate of seeds of population A growing in the upper part of the hill was the highest.The indoor germination rates of the seeds growing in the upper part, middle part, lower part and at the bottom of the hill were significantly higher than their natural germination rates.This paper indicated that D.versicolor was propagated from seeds,and the soil seed bank was a basic necessity for the natural regeneration and population restoration of D.versicolor,which has provided theoretical foundation for exploring the natural regeneration mechanism and restoring the population.
NETL
NSTL
万方数据
维普
