Study on regeneration of species in a subtropical pasture undergoing retrogression process
亚热带山地草地退化系列上种群更新研究(英文)

Seed bank,seedling recruitment and seed production of five prevalent species were studied along a degradation series on a subtropical mountain pasture.Results showed that (1).exotic species Trifolium repens and Lolium perenne regenerated themselves successfully at light and moderate degradation sites,but could not tolerate further deterioration of the pasture.(2).native species showed a great resistance to the stress of pasture deterioration. Cerastium caespitosum were predominant in seed bank,seedlings and seed production at moderate and heavy deterioration sites,while Poligonum sagittatum and Taraxacum sinicum were at heavy and extreme deterioration sites,respectively.(3).to control pasture deterioration and retain high level of pasture productivity,proper and effective measures should be implemented as soon as a reduction is detected in regeneration ability of the introduced species.