Radial Variation in Sap Flux Density as a Function of Sapwood Thickness in Two Eucalyptus ( Eucalyptus urophylla ) Plantations

Radial variation in sap flux density (SFD) as a function of sapwood thickness is of importance in accurately estimating sap flux through sapwood area which, in turn, decides the precision of heat pulse application. However, until now, only a few studies have evaluated the magnitude and significance of sampling errors associated with radial gradients in SFD, which were based on the small monitoring measurement data from a few trees. Based on one year of heat pulse observation of two 3 - 4 years old Eucalyptus urophylla S. T.,P Blake plantations in Leizhou Peninsula, Guangdong Province, China, a way of data processing was developed to treat with the lots of SFD data measured from 39 trees. It was found that the radial variation in SFD as a function of sapwood thickness in the two eucalyptus plantation sites could be expressed as y = 3. 667 5x(3) - 7.295 5x(2) + 3.682 6x + 0. 567 4 (R-2 = 0. 939 1, n = 80, P = 0.01), where y is the ratio of SFD of a sensor to the average of four data in different depths, x is the ratio of a sensor depth to tire radial sapwood thickness. It was the same (as in the following equation) in Jijia site, y = 5.006 2x(3) - 9.116 1x(2) + 4. 454 4x + 0.463 4 (R-2 = 0. 806 9, n = 72, P = 0.01) in Hetou site. From cambium to heartwood, SFD showed some increases at first and then decreases continuously. However, because die trees were very young, the maximum SFD was only 0. 33 - 0. 36 times more than the minimum.

Heartwood, sapwood and bark content of teak trees grown in Karnataka, India

We evaluated heartwood, sapwood and bark content in teak trees. A total of 27 sample plots were laid out in teak plantations raised by State Forest Department in Kamataka covering different age groups （11-36 years）, density （516-2061 trees/ha） and sites. From these planta- tions, a total of 130 trees were felled for estimating the yield and bark content in relation to diameter at breast height （DBH）, age and density. Bark content ranged from 22.2%-54.3%. Heartwood and sapwood con- tent were analyzed by sampling five trees each from two different planta- tions, one 30 years old at 553 trees.ha-1 and the other 32 years old at 911 trees.ha-1. The highest heartwood proportion of stem wood volume （over-bark） was 56.3% and the lowest was 37.1%.

Variations in bark thickness and sapwood density of Calophyllum inophyllum provenances in Australia and in Sri Lanka

Sapwood density and bark thickness of Calophyllum inophyllum L. （a multipurpose durable timber species） were studied in various locations in Northern Australia and in Sri Lanka. Measurements were taken non-destructively by using core sampling and bark gauge. From each provenance, 4–15 mature trees having girth at breast height over bark （GBHOB） at 100–150 cm were selected on the basis of the population size. Significant （p0.05） hemispheric and provenance variations in bark thickness were found. Variations in the bark thickness are influenced by environmental variables. Variations in sapwood density were less pronounced compared to that of bark thickness. Variations in sapwood density are likely to be governed by genotypic variations.

Movement of boron from ulexite and colemanite minerals in sapwood and heartwood of Cryptomeria japonica

This study evaluated boron diff usion from raw boron minerals ulexite and colemanite with low water solubility in comparison to disodium octaborate tetrahydrate(DOT).Tests were conducted using sugi(Cryptomeria japonica(L.)f.D.Don)sapwood and heartwood blocks conditioned to 30,60,and 90%target moisture content.The blocks were fi lled with the boron compounds through treatment holes and diff usion was observed at three assay zones across the blocks after 7,30,60 or 90-day incubation period at room temperatures.For comparison,ethylene glycol was also introduced into the holes to elevate boron diff usion.As expected,diff usion increased with increased moisture content and levels were higher at the 60%and 90%moisture levels compared to the 30%level.With some exceptions,boron levels did not follow consistent gradients with distance away from the treatment hole.Incorporation of ethylene glycol helped increase boron levels,even in heartwood blocks.Boron levels were higher from the ulexite source than from colemanite;however,DOT treatments resulted in the highest boron diff usion rates as a result of greater water solubility compared to both raw boron minerals.The results suggest that ulexite together with ethylene glycol may be useful in both sapwood and heartwood materials when kept at high moisture levels for extended periods.

Allometric relationships between primary size measures and sapwood area for six common tree species in snow-dependent ecosystems in the Southwest United States

High-elevation,snow-dependent,semiarid ecosystems across southwestern United States are expected to be vulnerable to climate change,including drought and fi re,with implications for various aspects of the water cycle.To that end,much less is known about the dynamics of transpiration,an important component of the water cycle across this region.At the individual-tree scale,transpiration is estimated by scaling mean sap fl ux density by the hydroactive sapwood area(SA).SA also remains a key factor in eff ectively scaling individual tree water-use to stand level.SA across large spatial scales is normally established by relating SA of a few trees to primary size measures,e.g.,diameter at breast height(DBH),tree height(H),or canopy diameter(CD).Considering the importance of SA in scaling transpiration,the primary objective of this study was therefore to establish six species-specifi c(aspen,maple,white fi r,ponderosa pine,Douglas fi r,Englemann spruce)allometric relationships between SA and three primary size measures(DBH,CD,or H)across two high-elevation,snow-dependent,semiarid ecosystems in New Mexico and Arizona.Based on multiple statistical criteria(coeffi cient of determination,index of agreement,Nash–Sutcliff e effi-ciency)and ease of measurement in the forest,we identifi ed DBH as the primary independent variable for estimating SA across all sites.Based on group regression analysis,we found allometric relationships to be signifi cantly(p<0.05)diff erent for the same species(ponderosa pine,Douglas-fi r)across diff erent sites.Overall,our allometric relationships provide a valuable database for estimating transpiration at diff erent spatial scales from sap fl ow data in some of our most vulnerable ecosystems.

Experimental determination and modeling of equilibrium moisture content from the sapwood of Mexican pine (Pinus pseudostrobus Lindl.)

A desorption isotherm is a very important basis in the understanding of drying process. In this study, the desorption isotherms from the sapwood of Mexican pine （Pinus pseudostrobus Lindl.） were determined by the gravimetric method （discontinuous control of sample weight） at 30℃ and 50℃. The salt method was used in the range of water activities from 0.11 to 0.89. The results show that the desorption ability of Mexican pine sapwood increased with temperature at a given relative humidity. The experimental data was further simulated with the models, i.e., BET, GAB, Oswin and Henderson models. The GAB, Oswin and Henderson models allow the representation of the entire desorption isotherms. The BET model showed a better fit for water activity lower than 0.35, with a mean relative deviation of 0.0286 at 30℃ and 0.0167 at 50℃. Simultaneously, the BET model gave a better representation of moisture content in the monolayer saturation region. Overall, the GAB model ensured the best simulation of the entire isotherm, while the Henderson model displayed the worst simulation.

Estimating tree and stand sapwood area in spatially heterogeneous southeastern Australian forests

Aims Natural and anthropogenic changes in forests can have important influences on transpiration and water production.Understanding the effects of increasing disturbances,due for example to climate change and forest harvesting,requires detailed information on how forest density and structural attributes relate to transpiration.Mean annual transpiration of eucalypt forest communities is often strongly correlated with total cross-sectional sapwood area.Our aim was to test an efficient method for estimating sapwood area at_(1.3)m height(SA_(1.3))in a large number of trees to understand the spatial heterogeneity of tree and stand sapwood area within and between forest communities,and develop allometric relationships that predict SA_(1.3)with forest inventory data.We also apply tree competition models to determine the degree to which the relationship between SA_(1.3)and tree basal area at_(1.3)m height(BABA_(1.3))is influenced by competition.Methods We visited 25 recently harvested southeastern Australian forest sites consisting of 1379 trees and 5 Eucalyptus species to evaluate a new efficient data collection method for estimating SA_(1.3)with tree taper and stump dimensions data using mixed effects models.The locations of 784 stumps within one 5-ha site were accurately mapped using an unmanned aerial vehicle(UAV),and four distance-dependent tree competition models were applied across the site to explain within-stand variation in the ratio of SA_(1.3)to BABA_(1.3).Data from 24 additional sites,consisting of ten 15 m radial plots per site,were used to analyse within-site variation in R_(Ha)(the ratio of stand sapwood area SA_(Ha)to stand basal area BABA_(Ha)).The radial plots were merged within each site to evaluate between-site variations in R_(Ha)across the landscape.For predicting SA_(Ha)with forest inventory data,we computed the relationship between SA_(Ha)and a new index of total stem perimeter per hectare,defined as√BA_(Ha)N_(T),where N_(T)is tree stocking density.Important Findings Our 1379 measured stems represent the most comprehensive measure of sapwood area,surpassing the 757 measured stems in native eucalypt forests published in literature.The species-specific R_(Ha) varied considerably across sites and therefore extrapolating SA_(Ha)with spatially distributed BABA_(Ha)maps and a generalized R_(Ha) would introduce local uncertainty.We found that the species-specific stem perimeter index was more effective at capturing variability in SA_(Ha)across the landscape using forest composition,structure and density data(R^(2):0.72–0.77).The strong correlation between tree SA_(1.3)and BABA_(1.3)improved slightly using tree competition models(R^(2)increased from 0.86 to 0.88).Relating SA_(Ha)to routinely measured forest inventory attributes within permanent plots and Light Detection and Ranging(LiDAR)data may provide opportunities to map forest water use in time and space across large areas disturbed by wildfire and logging.

Study on Longitudinal Gas Permeability of Air-dried Masson Pine Sapwood

Measurement of the longitudinal gas permeability was made for air-dried sapwood specimens from Masson pine （Pinus massoniana）. Results showed that air-dried Masson pine sapwood was one of the most permeable softwoods. The inv,,stigated specimens had an average longitudinal gas permeability of 4.60 ×10^13 m^3/m, and the permeablity ranged from 1.06×10^-13 to 1.12×10^-12 m^3/m. The Kruskal Wallis Test indicated that, generally, there was no correlation between the longitudinal gas permeability and the trees from which specimens were prepared, and tree height had no significant effect on the longitudinal gas permeability.

大花序桉心边材变异规律和候选基因挖掘研究

为探究大花序桉(Eucalyptus cloeziana)心材比例差异显著的不同家系间心边材变异规律,挖掘心材变异相关的候选基因,为珍贵用材树种高效培育及育种利用提供基因资源。以18 a生的2个心材比例差异显著的大花序桉家系为材料(家系1和2),各制作解析木3株,沿着树干以1 m为区间分段截取圆盘,测量东西和南北2个方向的带皮直径、去皮直径、总年轮数、边材年轮数、边材直径,并开展心材和边材径向和轴向分析。同时利用各解析木胸径处初生木质部样品进行DNA混池测序,发掘等位基因频率差异显著的SNP位点并挖掘相关功能基因。结果表明,大花序桉边材宽度和心材半径的方位变异中家系2大于家系1,平均差值分别为0.7和5.5 cm,在随树高的变异中,家系1和2的心材半径和心材年轮数的下降速率分别为0.40和0.64及0.43和0.36。两家系间基本密度差异显著,家系1为0.80~0.82 g/cm^(3),家系2为0.75~0.78 g/cm^(3)。基本密度与树高、横截面半径和心材半径呈显著负相关,与顺纹抗拉强度、弦面硬度和部分力学性质呈显著正相关。利用DNA混池测序共筛选到两家系间基因频率显著差异的SNP位点1842个,SNP注释分析表明位于基因间、上游区域、下游、外显子和内含子区域的SNP位点分别为55.8%、18.3%、16.3%、5.1%和4.4%。基因功能注释及富集分析发现SNP位点区域的基因主要与植物细胞分裂、植物细胞膜和植物蛋白激酶相关。通过大花序桉心材比例差异大的两家系间解析木径向和轴向分析,探讨了它们的心边材变异规律,结合DNA混池测序,挖掘了心材变异相关的SNP位点并筛选出一些木材形成相关候选功能基因。

醉香含笑不同树高处心边材挥发性成分的差异

为探究醉香含笑不同树高处心边材挥发性成分的积累规律及香气应用价值,利用顶空固相微萃取-气相色谱-四极杆飞行时间串联质谱法(HS-SPME-GC-QTOF-MS)对醉香含笑2个不同树高处心材、边材的挥发性成分进行非靶向代谢组学分析。采用主成分分析法(PCA)、正交偏最小二乘-判别分析法(OPLS-DA)、层次聚类分析法(HCA)分析不同树高处心边材挥发性成分差异,并鉴定差异代谢物。结果表明:醉香含笑2个不同树高心边材共鉴定出92种挥发性化合物,筛选出35个差异代谢物,其中边材中的单萜类、醛类、烷烃类化合物在边材中的合成水平显著高于心材,且随着树高的增加而积累。

温度对巨峰葡萄节间和带节茎段导水特性的影响

[目的]研究旨在明确巨峰葡萄枝条木质部导水能力与温度的量化关系,探索节对水分运输效率与安全性的影响。[方法]以巨峰葡萄1年生枝条为材料,在0.5~40℃温度范围,利用低压液流计法测试节间和带节茎段的导水率、比导率及导水率损失(PLC)随温度的变化,分析节与节间茎段导水特性的差异。[结果]巨峰葡萄茎段导水率和比导率均与温度呈极显著的线性关系。当温度从0.5℃升高至40℃,节间茎段的初始导水率、最大导水率、初始比导率、最大比导率分别升高154%、198%、157%和200%。节间茎段的导水率和比导率显著大于带节茎段,且差异随着温度升高呈增大趋势。节间茎段的PLC显著大于带节茎段,而带节茎段的导水率和比导率受温度的影响小于节间茎段。利用线性回归方程可对不同温度下的导水率和比导率进行预测。导水率和比导率与各温度下水的粘滞系数进行权衡后,各温度下的权衡导水率和权衡比导率没有明显差异。[结论]葡萄茎段导水率和比导率随着温度升高而增大,节对水分运输的效率和安全性有权衡作用。

装饰单板漂白染色处理的色差调控机理

装饰单板色差主要是由木材心边材木质素和抽提物含量的不同所导致的。木质素和抽提物中丰富的发色基团及助色基团使木材心材颜色加深,与边材形成明显的色差。采用漂白染色处理方法可以对装饰单板进行色差调控。为进一步分析色差调控机理,通过扫描电子显微镜(SEM)、红外光谱(FT-IR)、X射线光电子能谱(XPS)对漂白处理前后的黑胡桃单板微观结构和化学成分进行测试分析,研究木材心边材微观结构、内含物、木质素等物质中发色基团含量的变化,分析木材色度变化形成的机理。研究结果表明,漂白处理后心边材色差ΔE从11.48降至2.97,而染色处理可赋予装饰单板特定的色彩;扫描电镜、红外光谱和XPS分析结果显示,漂白处理的装饰单板导管内含物明显减少,去除了部分木材表面的脂肪酸类内含物。漂白过程中O/C值降低主要与木质素降解,以及主要的发色基团共轭CO双键被破坏导致O元素的含量降低有关。木质素所含有的共轭CO和CC发色基团产生了部分降解,这是漂白处理导致单板色度变化的主要原因。同时,木质素降解导致细胞壁产生皱缩,木材内部孔隙增多,利于染液在单板内部均匀渗透。而单板在染色过程中没有与染料发生化学结合,只是物理吸附的过程。

太行山侧柏树干心材与边材的厚度及其与直径的关系

在太行山石灰岩山地50年生侧柏(Platycladus orientalis)纯人工林中,采用树干解析与生长锥法调查了树干径向组分心材、边材、树皮的厚度及方位差异,分析了各组分厚度与树干直径的相关关系,构建了回归模型。结果表明,70株样树的树干直径分布在3.92~15.95 cm,平均直径为9.80 cm,即平均半径为4.90 cm,其中心材厚度(2.70 cm,占半径的55%)>边材厚度(1.84 cm,38%)>树皮厚度(0.36 cm,7%)。树干半径及心材厚度在不同方位间无显著差异;边材厚度及树皮厚度存在显著的方位差异,南侧最大。树干半径、心材厚度、边材厚度与树干直径呈极显著正相关;建立了树干不同方位心材、边材厚度与树干直径的非线性与线性回归模型。

东北主要树种心材与边材的生长特征

以东北东部山区温带森林的7个主要组成树种——红松、兴安落叶松、春榆、水曲柳、胡桃楸、黄菠萝和蒙古栎为研究对象,比较分析各树种心材和边材的生长特征。结果表明:树种显著地(P<0.001)影响边材年轮数和边材宽度,红松、水曲柳、兴安落叶松、胡桃楸、春榆和黄菠萝的平均边材年轮数分别为9.6、9.5、7.9、6.8、5.0和3.9年,其平均边材宽度分别为1.96、1.27、2.55、1.06、0.72和0.46cm。被测针叶树边材宽度明显大于阔叶树。心材年轮数与形成层年龄、心材半径和边材宽度与树干去皮半径均存在着极显著的正相关关系(P<0.0001),而边材年轮数随形成层年龄的变化规律因树种而异。心材形成速率和心材起始树龄因树种而异,分别波动在0.677～1.041a-1和4.3～8.5年。随树干高度增大心材半径和木质部半径递减,边材宽度则在树干基部异常大,1～2m向上保持相对稳定。心材年轮数随树高递减,但边材年轮数的变化因树种而异,红松边材年轮数递减,落叶松先增后减,水曲柳先减后增,春榆、胡桃楸和黄菠萝的变化很小。各树种心材和边材特征的显著差异,可以反映出其生长状况、水分利用对策、物质生产等方面的差异。

兴安落叶松边材心材生长特征的种源效应

以生长在相同环境条件下的7个代表不同气候地理条件(7个种源:塔河、满归、根河、新林、三站、乌伊岭、鹤北)的26年生兴安落叶松为对象,比较不同种源树木的边材/心材生长和异速生长关系,探索种源地气候条件对边材/心材生长特征的影响。结果表明:胸径(DBH)、边材宽度(SW)、边材面积(SA)、心材半径(HR)、平均边材生长速率(MSGR)等生长特征参数的种源间差异显著,其中最南种源地鹤北的生长特征参数的平均值最大,三站的平均值最小。种源也显著地影响SA、心材面积(HA)与MSGR的关系,但对其生长特征参数与DBH的异速生长关系和心边材比率(HSR)没有显著影响。SW,HR,HSR和MSGR分别与DBH呈极显著的线性关系,而SA和HA与DBH则呈极显著的幂函数关系。除了三站种源之外,种源地的年均温和年降水量都显著地影响兴安落叶松的SA和MSGR。兴安落叶松边材/心材生长特征因长期适应不同种源地的温度和降水等环境条件而发生了显著变化,这种变化主要是通过生长速率差异而不是改变其生长格局实现的。

不同林龄柚木人工林心边材生长变异特征

【目的】探明广西大青山林区不同林龄柚木人工林心、边材量及心材年轮数和心材高度的生长变异特征,以期为了解该区域柚木心边材发育特征、心边材量预测及高质量、大径级柚木目标树的高效培育提供基础数据和科学依据。【方法】以广西大青山10、18、31和41年生柚木人工林平均木的解析木为研究对象,对心、边材的方位变异和心、边材量的株间差异进行方差分析,并采用曲线估计法拟合心、边材量与横截面直径、总年轮数之间的回归模型,研究柚木心、边材生长变异特征。【结果】各林龄柚木树干心材半径主要为北向最大,边材宽度则主要为北向和东向最大,各林龄内,树干4个方位的心材半径、边材宽度均无显著差异(P>0.05)。各林龄柚木心材半径、心材面积和边材面积均表现为随树高增加持续减小,边材宽度在树干基部(0~1 m)明显偏大,且在树干一定区域内保持相对稳定。林分心、边材量总体表现为随林龄增加而增大,不同林龄林分间除边材宽度差异不显著外(P>0.05),心材半径、心材面积和边材面积均存在极显著差异(P<0.01)。横截面心、边材量随横截面直径和总年轮数的增加而增加,其中与横截面直径的相关性高于总年轮数,而总年轮数对心材发育早期影响较大。各林龄内,柚木个体的心边材量、心材消失最大高度存在较大的株间变异,其中,心材面积和边材面积的变异程度相近,心材半径、边材宽度和心材消失最大高度的变异程度相近。柚木最早在4年生时开始有心材形成,不同林龄的心材年轮数均表现为随总年轮数增加而增加,总年轮数可解释心材年轮数80%以上的变化,10、18、31和41年生柚木心材年轮数年均增长速率分别为0.9轮、0.7轮、1.0轮和1.0轮。柚木心材消失最大高度、心材消失的相对高度均与林龄呈正相关关系,即随着林龄的增大,心材在树干更高处消失。【结论】柚木心材形成初始年龄最早为4年生,属心材形成较早的树种。各林龄内,方位对柚木心、边材影响较小。柚木的心材半径、心材面积、边材面积和心材消失最大高度,均表现随林龄增加而显著增加,而边材宽度无显著变化。柚木横截面直径可以更好地解释横截面心、边材量的变化,总年轮数仅能解释柚木前期(<31年生)心材量的变化。研究认为41年生柚木心材仍有很大增长潜力,若要达到高质量、大径级的培育目标,还需要更长时间的培育。

GC-MS分析比较琼产降香黄檀不同部位材化学成分

以海南岛儋州10年生降香黄檀为研究对象,分别采用不同极性溶剂石油醚、乙酸乙酯、甲醇对降香黄檀木材的心材、心边材过渡带、边材进行提取,并采用气质联用技术(GC-MS)分析其提取物的成分及差异。结果表明,不同溶剂对降香黄檀进行提取,得到的提取物种类较完全。心材中主要含有25种化合物,萜类、醇类、饱和烷烃类物质较多,其中含量最多的成分为6α,11α-二甲氧基-6H-苯并呋喃-[3,2-c][1]-苯并吡喃(美迪紫檀素),甲醇提取液中含量高达26.07%;心边材过渡带中主要含有酯类、酚类物质;边材中主要含有烷烃类、酯类、酚类、萜类物质。在不同部位材的乙酸乙酯提取液中,发现边材和心边材过渡带也含有心材挥发油主要活性成分反式-橙花叔醇,其含量分别为5.89%、2.83%、1.96%。检索心材成分发现,7-羟基-3-(4-甲氧基苯基)-2H-1-苯并吡喃-2-酮、3,4-二氢-3-(2-羟基-4-甲氧基苯基)-2-氢-1-苯并吡喃-7-醇和7-羟基-3-(4-甲氧基苯基)-4H-1-苯并吡喃-4-酮是合成6α,11α-二甲氧基-6H-苯并呋喃-[3,2-c][1]-苯并吡喃的中间体。木材内部化合物间发生一系列的生理生化变化,逐渐累积形成心材成分。研究降香黄檀心材、心边材过渡带、边材的成分及其差异,为进一步探究心材形成的影响因素提供依据。

栽植密度对小黑杨边材、湿心材生长量的影响

以山西朔州地区的人工林小黑杨为研究材料,研究不同栽植密度（2 m×5 m、4 m×5 m、4 m×10 m）对小黑杨边材、湿心材生长量的影响。结果表明：不同栽植密度间边材年轮数差异不显著,而湿心材年轮数差异显著;栽植密度对边材宽度影响不大,而对湿心材宽度影响达极显著水平;对边材面积和湿心材面积影响均达极显著水平。随着栽植密度的减小,小黑杨边材、湿心材宽度及面积均呈增加趋势,但湿心材增加得更快。湿心材比例为60%~68%,且随着栽植密度的减小而增大。总体而言,栽植密度对小黑杨边材、湿心材生长量有不同程度的影响,且对湿心材生长量影响较大。

两种木腐菌对杉木心边材的选择性分解

以我国特有较耐腐树种杉木为研究对象,利用彩绒革盖菌(Coriolus versicolor(L.)Quél)和密粘褶菌(Gloeophyllum trabeum(Pers.)Murrill)分别对抽提前后杉木心边材侵染1个月。结果表明:密粘褶菌对杉木木材半纤维素的分解能力要强于彩绒革盖菌,彩绒革盖菌稍具分解木质素和纤维素的能力,而密粘褶菌对木质素和纤维素的分解能力不明显。苯醇抽提处理降低了彩绒革盖菌对木质素和纤维素的分解能力,提高了彩绒革盖菌对综纤维素和半纤维素的分解能力,降低了密粘褶菌对综纤维素和半纤维素的分解能力。杉木木材经两种木腐菌处理1个月后,其纤维形态无显著变化。

陈山红心杉主要化学组成的株内纵向变异研究

对陈山红心杉的心、边材的主要化学组成沿树高方向的株内纵向变异进行了研究。主要测定指标为木材p H值、综纤维素、纤维素、冷水抽提物、热水抽提物、苯-醇抽提物、1%Na OH抽提物、木质素、灰分含量等。研究结果揭示了陈山红心杉的心、边材的主要化学成分在纵向上的变异规律:陈山红心杉心、边材的p H值均较低,红心杉心、边材呈酸性,边材p H值均高于心材,并且心、边材的p H值均随着树高的增加而升高;陈山红心杉心、边材的综纤维素、纤维素、酸不溶木质素含量均为边材高于心材,但在沿树高方向的纵向变化规律各异;陈山红心杉心、边材的冷水抽出物、热水抽出物、苯醇抽出物、灰分、1%Na OH抽出物含量均为心材高于边材,且陈山红心杉心、边材的这5种化学组成含量沿树高方向逐渐降低。