实生苗是植物种群更新的主要资源。
Seedling is the main resources which plant population renews.
种群更新不良， 具有明显的衰退趋势。
The regeneration of population of E. henryi was poor and the population size was declining.
这些特征将影响到巴山冷杉种群的分布格局和种群更新。
These characteristics would influence the pat-tern and regeneration of Abies fargesii population.
研究结论如下： 沙棘是一个良好的人工林天然化灌木物种，在黄土丘陵区该种群更新良好。
Hippophae rhamnoide is a nicer shrub species for plantation becoming savageness. This population could renew very well in Hilly-gully region of Loess plateau.
海桑人工种群已经出现某种程度的自然更新和扩散，这将有利于增加海桑人工种群的结构复杂性和稳定性。
Natural regeneration and dispersal of artificial S. caseolaris population had more or less occurred, which may increase the structural complexity and stability of the artificial population.
坡向对锐齿槲栎种群的更新有重要影响，光照好的东南坡上的更新情况明显比光照较少的西北坡好。
Influence of the slopes with different directions on population regeneration was also studied, and it showed that the slope direction was one important factor for regeneration.
本文研究了卧龙自然保护区冷箭竹更新幼龄无性系种群冠层结构的数量特征。
The quantitative characters of the canopy structure of young Bashania fangiana clonal population after natural regeneration in Wolong Nature Reserve were studied.
从分子生态学、种群生态学、更新复壮及扦插繁殖角度系统研究了珍珠黄杨资源的保护与利用。
From aspects of molecular ecology, population ecology, rejuvenation and cutting propagation, the conservation and utilization of B.
消极围栏保护可缓解人为因素对四合木种群的影响，但无法有效促进四合木种群的更新；
Mongolica under the situation of natural renewal, negative conservation by corral, and positive conservation by corral are studied.
消极围栏保护可缓解人为因素对四合木种群的影响，但无法有效促进四合木种群的更新；
Mongolica under the situation of natural renewal, negative conservation by corral, and positive conservation by corral are studied.
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