搜索结果: 1-5 共查到“森林保护学 resistance”相关记录5条 . 查询时间(0.203 秒)
Improving the Pine Wilt Disease Resistance of Cutting-propagated Japanese Black Pine Plantlet Populations by Inoculating Ortets with Pinewood Nematodes
Bursaphelenchus xylophilus cutting inoculation pine wilt disease resistance Pinus thunbergii
2009/8/28
Fifteen resistant individuals were selected from 38 sexually reproduced, open-pollinated seedlings from a pine wilt disease-resistant clone (Sendai (t)-290) of Japanese black pine (Pinus thunbergii). ...
Genetic Control of Resistance to Snow Damage in Sugi (Cryptomeria japonica)
basal bending breeding control-pollinated progenies resistance snow damage
2009/8/27
To study the mode of inheritance of resistance to snow damage in sugi (Cryptomeria japonica), we crossed varieties that were resistant and sensitive to snow damage using a factorial design experiment....
Resistance coefficients on ground-based winching of timber
winching coefficient traction tractor assembly thinnings weight of log
2009/2/7
This paper deals with the research of resistance differences in winching of logs with their thicker or thinner end turned forward.Winching represents traction of wood assortments on the ground from ...
Evaluation of a mature lodgepole pine stand’s resistance to the current mountain pine beetle infestation after nitrogen fertilization
lodgepole pine mountain pine beetle nitrogen fertilization Southern Interior Forest Region
2009/2/6
Research is currently under way in the Southern Interior Forest Region to determine whether nitrogen fertilization can be used to increase mature lodgepole pine trees?natural defences against the moun...
The Effect of Some Boron Compounds and Water Repellents on the Fire Resistance Properties of Scotch Pine Wood
Boron Compounds Water Repellents Fire Resistance Properties Scotch Pine Wood
2009/1/15
This investigation was designed to improve the fire-resistance properties of polyethlene glycole (PEG-400) and some water repellent solutions used to improve the flammability properties of wood. For t...