子午岭马兰林区辽东栎幼苗定居限制的初步研究

在子午岭马兰林区选择油松林、辽东栎林、灌丛、草地等四种群落,通过播种实验及3 a的跟踪调查,研究四种不同生境下辽东栎幼苗在定居过程中的生长规律.结果显示:在四种生境中,人为增加辽东栎种子密度,均能明显提高出苗量,幼苗生长三年后大量死亡,死亡高峰出现在第三年.郁闭生境下(油松林和辽东栎林),辽东栎出苗率及存活率高于开阔生...

A pilot study of establishment limitation of Quercus wutaishanica seedlings in Malan Forest Region on Mt.Ziwuling

In Manlan forest region on Mt.Ziwuling,four types of stands(Pinus tabulaeformis forest,Quercus wutaishanica forest,Shurb and Grassland) were selected for seed sowing experiments.The growth data of seedlings establishing in four habitats were measured continiously in 3 years.The results showed that,in every stands,seeds addition could lead to higher seedling emergence,but the great deal of seedlings were dead after three years and the peak value presented in the third year.Under closure conifer and oak forest canopies,the seedling emergence and survival rates of Q.wutaishanica were higher than them in open shrub and grassland stands.The seedling height and diameter had no significant difference among three years.The early regeneration of Q.wutaishanica in this local,was limited by seed and microsite together.The litter thickness and light intensity were the primary microsite limitation factors.The invasion of Q.wutaishanica towards conifer plantation may be improved by artificial seed sowing and litter disturbing.