8Roberto L C, Zedler J. Effect of light on seed germination in Phalaris arundinacea L. (reed canary grass) [J].Plant Ecology, 2001,155(1):75-78.
9Baskin C C, Milberg P, Anderson L. Seed dormancy- breaking and germination requirements of Orosera anglica, an insectivorous species of the Northern Hemisphere[J].Acta Oecologica, 2001(12):l-8.
10Ren J, Tao L. Effects of different pre-sowing seed treatments on germination of 10 Ca]ligonum species[J].Forest Ecology and Management, 2004,195:291- 300.