晚材

木材密度与晚材率的正相关显著。

Wood basic density is clearly related to late wood percent .

造林密度大，则生长轮变窄，管胞列数减少，晚材率增加。

As planting density increased , the growth ring width and tracheid row decreased but proportion of late wood increased .

结果表明：与PF相比，UF在杨木表面的润湿性能较好，UF对早材的润湿性能比对晚材好；

The result showed that UF resin exhibited a better wettability on poplar surface than PF resin .

火炬松木材晚材率径向变异模式为10a以前随生长轮的增加而迅速增加，11a后逐渐趋于稳定。

The variation model of latewood percentage of loblolly pine is increases rapidly before 10a , and after 11a levels off .

树龄、晚材率和木材密度与MOE、MOR在0.01水平上呈显著正相关，木材基本密度估测MOE、MOR优于晚材率。

MOE and MOR were significant positively related to tree age , latewood percent and wood density . Wood density could be a best factor used for predicting MOE and MOR in wood improvement .

不同生长环境全树及0.5m树高处的早材、晚材管胞长度，管胞宽度，管胞长宽比，差异均不显著。

Secondly , the differences of tracheid length , tracheid width , ratio of length to width of both early wood and late wood were insignificant among the whole trees and the trees of 0.5 meter height as well in different growth environments .

早材管胞微纤丝角明显大于晚材。

The microfibril angle of earlywood tracheid bigger than that of latewood .

云杉属木材晚材率变异系数与声振动特性参数

Variance coefficient of latewood percentage to sound vibration parameters of Picea genera wood

GB/T1930-1991木材年轮宽度和晚材率测定方法

Method for determination of the annual rings width and latewood rate of wood

日本花柏人工林生长规律与晚材率、木材密度的变异

Growth Regularity of Chamaecyparis pisifera and Variations for Latewood Percentage and Wood Basic Density

经、纬向双重渐变是长白落叶松管胞形态变异的基本模式，木材密度、硬度、晚材率、年轮宽等性状随机变异的趋势比较明显。

The random variation tendency of timber density , hardness , late-timber percentage and age-ring width is obvious .

云杉木材声振动性能与生长轮宽度、晚材率之间关系的研究

Study on relationship between sound vibration parameters and growth ring width and latewood percentage of Picea genera wood

晚材率、木材密度与顺纹抗压强度、抗弯弹性模量、抗弯强度呈正相关；

Latewood percent and wood basic density were separately correlated with CP , MOR and MOE in all treated trees .

火炬松种源建筑材抗弯性质的变异及与树龄、晚材率、木材密度的关系

Variation in Wood Bending Properties of Exotic Loblolly Pine Provenances for Building Lumber and Their Relationships to Tree Age , Tree Growth and Wood Density

对生长轮宽度、晚材率、生长轮密度、木材硬度有显著影响；

There are significant effects for thinning intensity on growth ring width , late wood percentage , growth ring density and hardness of Fraxinus mandshurica .

日本花柏株内晚材率径向变异范围为11.08%～32.05%，均值为20.59%；

The variant range of latewood percent is from 11.08 % to 32.05 % in radial direction within individuals and the mean latewood percentage is 20.59 % .

按照20%的选择率，早材和晚材的微纤丝角的遗传增益分别为21.82%和29.75%。

The average genetic gains were 21.82 % and 29.75 % for the microfibril angle of earlywood and latewood if 20 % of the best clones was selected .

火炬松种源顺纹抗压强度变异及与树龄、晚材率、木材密度相关分析

Variation in Crushing Strength Parallel to the Grain of Wood for Provenances of Exotic Loblolly Pine and Its Relationships with Tree Age , Wood Density and Latewood Percentage

早材与晚材的微纤丝角也相关显著。早材和晚材的微纤丝角受中到强度遗传控制，广义遗传力分别为0.7674、0.8043。

The broad sense heritability estimates of clones were 0.767 4 and 0.804 3 , indicating the microfibril angle of earlywood and latewood was under strong genetic control .

落叶松最大密度、晚材平均密度、早晚材宽度和轮宽都远高于樟子松。

The maximum density , mean latewood density , earlywood width , latewood width and annual ring-width in Larix gmelinii were higher than those in Pinus sylvestris var. mongolica .

而正常材大多数是非闭塞的，早、晚材的闭塞程度分别只有6.8%和13.4%。湿心材中大量存在的闭塞纹孔，是引起木材干燥困难的直接原因。

Most of bordered-pit membranes in normal wood are un-aspirated at green condition and the proportions of aspirated pits in early wood and latewood counted only 6.8 % and 13.4 % respectively .

物理特征主要是早材密度和晚材宽度，木纤维主要是早晚材的木纤维壁厚。

The physical characteristics mainly refer to the density of early wood and the width of late wood . Wood fibers mean the thickness of fiber walls of early wood and late wood .

系统在对不同树种采用不同方法进行判读与分析的同时进行了木材密度、轮宽、晚材率和密度变异等重要参数的计算，并将这些参数以文本文件形式存贮。

The system accomplishes the calculation of the main coefficients , Such as destiny of wood , ring width , latewood percentages and destiny variation etc , and reserves these coefficients as word documents .

我国南方五省区湿地松木材的密度、晚材率和各项力学强度，随纬度的增加，呈递减状态。

The higher the latitude , the smaller become the specific gravity , the latewood percentage and the mechanical strength of slash pine which grows in four provinces and an autonomous region of the southern China .

本文对贵州省龙里林场马尾松密度试验林，5种造林密度，15年生马尾松木材基本密度、生长轮宽度、晚材率和解剖特性进行研究。

This paper studied the wood basic density , growth ring width , proportion of late wood and anatomical features for 15 years Masson pine plantations with 5 different planting densities in Longli , Guizhou province .

结果表明：试件纵向弹性模量随晚材率、管胞长度、管胞壁厚度的增加而增加，而试件纵向弹性模量随管胞直径增加而减小。

Results showed that the longitudinal elastic moduli increased with increasing of latewood percentage , tracheid length , and thickness of cell wall , and it decreased with increasing of radial and tangential diameter of tracheid .

结果表明：不同的森林培育措施（坡位、林分结构、初植密度、间伐）对红松人工林的生长率、生长轮宽度及生长轮密度有显著的影响，对晚材率的影响不明显；

The results showed that the variances of growth percentage , growth ring width ( except pruning ), growth ring density ( except slope aspect and pruning ) were remarkable , and the variance of latewood percentage ( except pruning ) was not significant .

研究结果如下：（1）同一生长轮内，应压木年轮较对应木宽，生长轮明显，早材带至晚材带为缓变。

The results obtained were as follows : ( 1 ) Compared with the opposite wood in the same growth ring , the growth ring is wider and more obvious on compression wood , and it was varied slowly from earlywood zone to latewood zone .