【摘要】 水杉为我国一级保护的珍稀濒危树种,由于人为干扰等原因,目前水杉自然更新困难。枯枝落叶层是森林天然更新的重要影响因素。在室内设置了0 cm、1 cm、2 cm、3 cm、4 cm以及5 cm 6个枯落物厚度梯度,模拟研究枯落物厚度对水杉种子萌发的影响,结果表明枯落物厚度超过2 cm时,水杉种子不能萌发;枯落物厚度1 cm时水杉的萌发率为31.3%;水杉种子在不覆盖的情况下萌发率最高,为64.7%。同时,覆盖枯落物后水杉种子萌发开始时间和结束时间要推迟10天左右。更多还原

【Abstract】 The native metasequoia trees are mainly distributed at Lichuan,Hubei province.It is found the habitat of most native dawn redwood trees were interfered intensively by human activity and can not natural regeneration.We study the influence of different litter layer on seed germination of metasequoia tree.The results show that both seed contact litter and litter depth exceed 2cm seeds do not germination.When litter depth is 1cm,the seed geramination ratio is 31.3%.The best high germination ratio is 64.7%,then seeds do not cover with litter.It is about 10 days delayed the begin and finish of seed germinaton when cover litter layer.更多还原