1)population regeneration种群更新
1.mongolica and their relations to the population regeneration.就四合木的种子雨、种子萌发、幼苗生长及其适应性以及克隆分株特性与其种群更新的关系等方面进行了综述,并对四合木的种群更新与保护策略提出了若干建议。
英文短句/例句
1.Study on Regeneration Mechanism of Clonal Population of Epimedium Koreanum;朝鲜淫羊藿无性系种群更新机制的研究
2.Population Regeneration and the Protective Strategies of Endangered Desert Shrub Tetraena mongolica濒危荒漠灌木四合木的种群更新与保护策略
3.The effects of wildness training giant pandas grazing and artificial harvesting on the regeneration of umbrella bamboo(Fargesia robusta) clone population野化培训大熊猫采食和人为砍伐对拐棍竹无性系种群更新的影响
4.Sprouting and height in a Fagus engeriana population米心水青冈种群萌条更新与高度生长
5.Study on species niche of Schima superba and Pinus massoniana artificial forest shrub layer木荷马尾松林更新层种群生态位分析
6.Study on Larix Principis-rupprechtii Population Natural Regeneration Pattern in Clearing Strip;采伐迹地华北落叶松种群自然更新格局研究
7.Preliminary Investigation of Natural Regeneration of Masson Pine Population in Closing the Land for Reforestation Area;封山育林区马尾松种群天然更新初步调查
8.Population Structure and Recruitment of Acacia mearnsii in Wenzhou温州地区黑荆树的种群结构与更新的研究
9.Regeneration and fruiting of Pinus tabulaeformis Carr.artificial forest in Loess Plateau of northern Shaanxi陕北黄土高原油松人工种群结实与更新
10.Regeneration of Four Types Forest Communities in Liupan Mountains六盘山4种类型森林群落天然更新初探
11.Population Structure and Regeneration of the Main Tree Species in Three Typical Forests in the Three Gorges Reservoir Area三峡库区3种典型森林主要组成树种的种群结构及更新
12.Effects of the Different Transformation and Regeneration Models on Species Composition and Plant Diversity of Cypress Forests不同改造和更新模式对柏木林群落物种组成和物种多样性的影响
13.A Novel Multi-Step Position-Selectable Updating Particle Swarm Optimization Algorithm一种新型多步式位置可选择更新粒子群优化算法
14.Study on the impacts of forest cutting and fire behvior on generation and species group structure of dahurian larch;采伐干扰和火干扰对兴安落叶松林更新及种群结构影响的研究
15.Study on Characteristics and Species Regeneration Dynamics of Tsuga Longibracteata Forest Gaps;长苞铁杉群落林隙干扰特征及物种更新动态研究
16.The Effect of Three Cutting Regeneration on the Highness Class Stucture of Castanopsis Carlesii Community;三种采伐更新模式对米槠群落高度级结构的影响
17.Natural Regeneration of Chinese Sweet gum (Liquidambar formasana) Population in Southeast Hilly Region of Hubei Province鄂东南低山丘陵区枫香种群的天然更新方式与特征
18.A dynamic replica updating strategy of clustered streaming media system based on accessing probability pre-allocation一种基于访问概率预分配的流媒体集群动态副本更新算法
相关短句/例句
plant population regeneration植物种群更新
3)population regeneration obstacle种群更新障碍
4)Population regeneration types种群更新类型
5)community regeneration群落更新
1.Gap characteristics and its effects on community regeneration of Quercus liaotungensis forest on Loess Plateau;辽东栎林林隙特征及其对群落更新的影响
6)regeneration community更新群落
延伸阅读
药用植(动)物种群更新药用植(动)物种群更新renewal of species population of medicinal plant and animal 丫aovong zhi(dong)wu zhongqun gengxjn药用植(动)物种群更新(renewal of sPeeies populationof medicinal plant and aninla)某种药用植(动)物种群破坏后的增长或恢复。进行药用植(动)物调查内容包括:种群的空间格局类型、种群密度及其变动因素、种群出生率和死亡率以及种群年龄结构、性比、生命表和存活曲线等。 在种群更新调查中，种群统计是保证种群更新的基础工作。调查方法是:追踪观测一个幼苗同生群的死亡情况，定期进行统计，利用这种方法编制生命表。由于植物种群结构不同，要区分出一次结实草本植物、多次结实多年生草本植物、灌木和乔木。在种群统计后特别要观测调查其有性生殖和无性繁殖的生物学，以确定它们的生育能力。此外，还必须着重调查种群的年龄结构。调查方法一般是在样地里选择若干样方，逐个调查，统计其中各个体的年龄。木本植物的年龄可用同样木的年轮或茎枝上的芽鳞痕等特征来判断;多年生草本植物则要根据它们个体的发育形态变化来测算。瓢 沙棘(《中药彩色图集》) 性比(种群结构中雄性与雌性个体数目之比)在种群更新调查中也有重要意义。如果雌雄性个数之比相差悬殊，种群增殖会受到阻碍。例如雌雄异株的沙棘，经调查天然种群中性比为3:7，这显然对植物种群更新不利，也不利于果实的收获，因此可以采取人工方法调节其种群性比，以利种群更新。 (王良信)
