搜索结果: 1-15 共查到“林学 stem”相关记录28条 . 查询时间(0.188 秒)
Integration of Multi-Sensor Data to Estimate Plot-Level Stem Volume Using Machine Learning Algorithms-Case Study of Evergreen Conifer Planted Forests in Japan
UAS stem volume TLS SAR random forest support vector multiple regression forest biophysical parameter
2023/12/21
The development of new methods for estimating precise forest structure parameters is essential for the quantitative evaluation of forest resources. Conventional use of satellite image data, increasing...
Long-Term Soil Fertility and Site Productivity in Stem-Only and Whole-Tree Harvested Stands in Boreal Forest of Quebec (Canada)
forest biomass whole-tree harvesting soil productivity site quality index soil provinces
2023/12/19
Using residual biomass from forest harvesting to produce energy is viewed increasingly as a means to reduce fossil fuel consumption. However, the impact such practices on soil and future site producti...
Drought induces epitranscriptome and proteome changes in stem-differentiating xylem of Populus trichocarpa
Populus trichocarpa Drought stem-differentiating xylem epitranscriptome proteome RNA
2023/11/16
Understanding gene expression and regulation requires insights into RNA transcription, processing, modification, and translation. However, the relationship between the epitranscriptome and the proteom...
An efficient method to reduce grain angle influence on NIR spectra for predicting extractives content from heartwood stem cores of Toona. Sinensis
NIR spectra heartwood stem cores Toona. Sinensis grain angle
2023/6/5
A fast, reliable and non-destructive method is needed to qualify the extractives content (EC) in heartwood of T. sinensis cores in the breeding program for studying the genetic effect on EC. However, ...
Adaptive k-tree sample plot for the estimation of stem density: An empirical approach
plotless sampling distance sampling bias efficiency forest sampling
2018/3/6
Available budgets for the inventory of non-commercial woodlands are small. Therefore, there has been increased
interest in using distance methods, such as k-tree sampling, which are faster than fixed...
Impact of logging intensity on stem density, basal area and biodiversity indices five years after logging in a Caspian hardwood forest
harvesting intensity forest biodiversity northern Iran
2017/6/26
The aim of the present study was to analyse the impacts of different logging intensities after five years from logging including non-logged, low (3.4 felled stems per hectare), medium (5.2 felled stem...
Effect of permanent waterlogging on the growth of poplar clones MAX 4,MAX 5 (J-104, J-105) (Populus maximowiczii A.Henry × P. nigra Linnaeus) and evaluation of wood moisture content in different stem parts–Short Communication
biomass fast-growing tree species effect of site energy coppicies short rotation Japanese poplar
2016/5/11
The study deals with differences in the growth of 2-year mix of poplar clones MAX 4, MAX 5 in the first rotation period at a site with the average moisture regime and at a neighbouring site affected b...
Effect of repeated fertilization on stem growth in old stands of Pinus sylvestris in South East Norway
nitrogen Scots pine tree ring widths
2015/5/18
We studied effects of repeated nitrogen applications on the stem growth of mature Scots pine at four sites
with the yield potential of around 3‒4.5 m3·ha–1·yr–1. Treatments included control (0...
Testing of microbial additives in the rooting of Norway spruce (Picea abies [L.] Karst.) stem cuttings
rooting of cuttings microbial additives ectomycorrhizal inoculation Picea abies Karst
2015/3/27
Laboratory-produced alginate-bead inoculum of ectomycorrhizal (ECM) fungi Cortinarius sp. and Gomphidius glutinosus, fungal commercial products ECtovit® and Trichomil®, bacterial commercial ...
Influence of stand density, thinning and elevated CO2 on stem wood density of spruce
stand density stem wood density thinning
2015/3/6
Stem wood density (SWD) of young Norway spruce trees (Picea abies [L.] Karst.) growing at ambient (A variant, 350 μmol(CO2)/mol) and elevated (E variant, A + 350 μmol(CO2)/mol) atmospheric CO2 concent...
Comparison of Norway spruce (Picea abies [L.] Karst.), Scots pine (Pinus sylvestris L.) and European larch (Larix decidua Mill.) stem shape by means of geometrical methods
Norway spruce Scots pine European larch stem shape
2015/3/3
In this article the stem shape is compared in three coniferous tree species: Norway spruce, Scots pine
and European larch. Stem is investigated by means of geometrical methods. Simplified Bookstein ...
Effect of repeated fertilization on stem growth in old stands of Pinus sylvestris in South East Norway
nitrogen Scots pine tree ring widths volume increment
2015/5/6
We studied effects of repeated applications of nitrogen on stem growth of mature Scots pine at four sites with yield potential around 3 - 4.5 m3 ha‑1 yr‑1. Treatments included control (0) ...
Effect of the position in a stem on the length of tracheids in spruce (Picea abies [L.] Karst.) with the occurrence of reaction wood
spruce tracheid length of tracheids compression wood
2015/2/6
The paper was aimed at the determination of variability of tracheid dimensions in spruce wood in relation to the position in a spruce stem. Significant changes in dimensions were found in early-wood a...
Possible methods of Norway spruce (Picea abies[L.] Karst.) stem shape description
Norway spruce (Picea abies [L.] Karst.) stem shape Bookstein coordinates stem shape diameters Procrustes tangent coordinates principal components analysis
2015/2/6
The paper shows a possibility of using Bookstein coordinates for stem shape studies. Bookstein coordinates are simplified to stem shape diameters, for which tests of multidimensional normality, varian...
A contribution to the knowledge of Scots pine (Pinus sylvestris L.) stem shape
Scots pine (Pinus sylvestris L.) stem shape Procrustes analysis principal components analysis
2015/2/2
This is a study on the evaluation of stem shape in Scots pine. The experiments were carried out on 430 stems without bark, taken from 30 fully analysed sample trees that grew in 5 different locations ...