农学 >>> 林学 >>> 林业基础学科 林木遗传育种学 森林培育学 森林经理学 森林保护学 野生动物保护与管理 防护林学 经济林学 园林学 森林统计学 林业经济学 林学其他学科
搜索结果: 1-14 共查到林学 population相关记录14条 . 查询时间(0.156 秒)
The spatial distribution of the population is uneven?for various reasons, such as urban-rural differences and geographical conditions differences. As the basic element of the natural structure of the ...
Juniperus macropoda is the only tree species of a cold desert ecosystem that is experiencing high anthropogenic pressure and has a poor regeneration status due to harsh environmental conditions. Due t...
Independent assessments of the local community’s needs for recreational development of forests provide important information for forestry and forest administrations. The study was designed to identify...
We estimate an equilibrium model of land clearing to study the impacts of roads and population on deforestation in Thailand between 1976 and 1989. Population pressures were more important in the N...
Wild boar is a native species in the fauna of the Czech Republic. It is becoming a problematic game species both in the Czech Republic and in other European countries due to its harmful impacts. So ...
The paper deals with the study of bionomics and population dynamics of Ips typographus (L.) in the area of the Praděd National Nature Reserve (NNR). Data were collected on the basis of detected feedin...
Cameraria ohridella Deschka et Dimic is a polyvoltine species which can complete under suitable conditions the development of as many as three generations a year. In the Czech Republic, however, the t...
POPULATION 7 started as an experiment in the fall of 2011 as an Urban Art Laboratory “Art – Place – Tour” with the vision to make a tangible impact to the culture of public art in Springfield. At firs...
Local communities depend on Kalinzu Forest Reserve (KFR) for plant resources. This resource utilization affects the population of tree species in the forest. This study set out to estimate the populat...
We investigated paternal contribution in artificial crossed-populations made by mixed pollen from plus tree clones of Cryptomeria japonica D. Don in Niigata Prefecture. Using six polymorphic microsate...
Although geographical variation was proposed for morphological, physiological and ecological traits of Monochamus alternatus, there has been no information about its genetic structure. Recent progress...
To obtain the pine trees with high resistance to the pine wilt from susceptible species, the criteria for selective breeding should be made based on the inhibition factors of symptom development. Migr...
The Ohdaigahara subalpine plateau has recently suffered deforestation caused by an increasing population of sika deer (Cervus nippon), which stripe the bark of many coniferous trees and browse seedlin...
摘要 利用叶绿体微卫星(cpSSR)分子标记对日本国内的7个日本落叶松(Larix kaempferi)群体遗传结构进行了研究。11对cpSSR引物中筛选出的3对多态性引物,共产生10个长度不同片段,在197个样品中组合出现10个不同的单倍型(haplotype)。各群体的单倍型差异较大。cpSSR基因座揭示了日本落叶松的遗传变异:平均等位基因数A=3.33,平均有效等位基因数NE=1.20,基...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...