搜索结果: 1-5 共查到“森林保护学 factors”相关记录5条 . 查询时间(0.131 秒)
Factors affecting the development of Phytophthora alni ssp. alni infections in Alnus glutinosa L.
Alnus glutinosa black alder Phytophthora alni subsp alni infection experiment natural infection seasonal variation
2015/4/14
Phytophthora alni is responsible for a devastating disease in alder and changes in the environment of riparian and alder carr ecosystems. One of the main approaches to solve this problem is to find na...
Which factors explain lepidopteran larvae variance in seasonal guilds on some oaks?
cluster analysis DCA history-life traits of lepidopteran larvae oaks seasonal guilds
2015/3/20
Differences between the oak lepidopteran communities were studied in Slovakia in 1993 and 1994. Sampling was undertaken between April and October on 3 oak species. Biological traits of larvae were exa...
The survey of some factors affecting bark lesion development caused by Phytophthora cactorum on common beech and other broadleaved trees
artificial infection bark lesion broadleaved trees pathogenicity common beech Fagus sylvatica Phyto-phthora cactorum substrate specificity water stress
2015/3/19
The three experiments relating to the pathogenicity of Phytophthora cactorum to beech and other forest tree species were carried out. The experiments were aimed to confirm pathogenicity of the pathoge...
The Relationship between Forest Conversion and Inequality of Land Ownership,and the Factors Responsible for Increasing the Inequality in Sumatran Rubber Villages,Indonesia
forest loss Indonesia land ownership poverty rubber
2009/8/27
In Indonesia, the main factor behind forest clearance has been agricultural expansion, especially that of cash tree crops such as rubber and oil palm. This paper aims to clarify if forest loss due to ...
Examining the utility of advance regeneration for reforestation and timber production in unsalvaged stands killed by the mountain pine beetle：Controlling factors and management implications
reforestation and timber production unsalvaged stands mountain pine beetle
2009/2/6
In unsalvaged stands killed by the mountain pine beetle, the release and growth of shade-tolerant advance regeneration may provide an important reforestation pathway. Stands developing from advance re...