Vessel and fibre - tracheid are both spiral thickening distinctly.
导管与纤维管胞均具明显的螺纹加厚。
The tracheid diameter and the thickness of cell wall increase from pith to bark.
管胞直径、胞壁厚度自髓心向外增加。
Genetic variations on tracheid microfibril Angle of 55 Chinese fir clones were investigated.
对55个杉木无性系管胞微纤丝角的遗传变异进行了研究。
There were very small effect of seed source and no definite geographic pattern in tracheid length.
管胞长度的种源区和产地效应很小，无一定的地理变异趋势。
Tylose a bladder like ingrowth from a parenchyma cell into an adjacent tracheid or vessel through a paired pit.
薄壁细胞向内生长的泡状物通过纹孔伸入相邻的管胞或导管形成的结构。
As planting density increased, the growth ring width and tracheid row decreased but proportion of late wood increased.
造林密度大，则生长轮变窄，管胞列数减少，晚材率增加。
The effect of intermittent flood upon the radial variation of tracheid features of Taxodium ascendens was investigated.
研究间歇性淹水对池杉木材管胞形态变异的影响。
The results showed that there were distinct differences in micro-fibril Angle, width of growth-ring and tracheid diameter.
结果表明，管胞直径和微纤丝角及生长轮宽度等指标表现为差异显著。
Tensile strength is mainly controlled by tracheid length, tracheid strength, microfibril angle and crystalline degree etc.
顺纹抗拉强度主要受管胞长度、管胞强度、纤丝角度、结晶度等因子的控制。
No significant difference was also found among tree types with different growth rate for specific gravity and tracheid length.
不同生长速率的样木间该二性状差异很小。
The results show that the average value of tracheid form can not be affected by the planting density through variance analysis .
结果表明，造林密度对马尾松管胞形态总平均值影响不大，方差分析不显著；
The optimum selection age of basic density was determined at 10 years, the juvenile-mature correlation in tracheid length was unstable.
所以，10龄被确定为基本密度的最佳选择年龄。管胞长度幼——熟龄相关不稳定。
The tracheid form and radial variance were studied for 15 years Masson pine plantations with five different planting densities in Longli, Guizhou.
采集贵州省龙里林场马尾松密度试验林15年生马尾松木材，5种造林密度，研究造林密度对马尾松管胞形态及其径向变异的影响。
There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma, the axial tracheid and the ray tracheid.
轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。
There are different types of pit-pair between the axial tracheids. the axial tracheid and the ray parenchyma , the axial tracheid and the ray tracheid.
轴向管胞之间、轴向管胞与射线薄壁细胞之间、轴向管胞与射线管胞之间，均有不同类型的纹孔对。
The tracheid and sieve tube elements are all differentiated from the procambia in the center of the haustoria, and the former occurs prior to the latter.
吸器中管胞和筛管都是从吸器中央具有原形成层特性的细胞分化的，管胞的分化先于筛管，或同时进行。
The broken - line graph of average values of families show evident differences in wood basic specific gravity and tracheid length between different regions.
家系均值折线图显示，不同地区木材的基本密度、管胞长度层次明显。
Among the climatic factors which affect the geographic variation of tracheid morphological, moisture and rainfall are the principal factors, secondary is temperature.
影响管胞形态地理变异的气候因子中，水湿条件是主导因素，其次是温度。
The results showed: from pith outward, the tracheid length and diameter and cell wall thickness of Taxodium ascendens wood with or without intermittent flood all increased.
结果表明：间歇性淹水对池杉木材管胞形态的径向变异规律无影响，即不论有无间歇性淹水，池杉木材管胞长度、直径、壁厚，皆是自髓心向外呈增加趋势。
The results indicated that the five traits like height, diameter at breast height, volume, wood basic density and tracheid length showed at least significant genetic variation among clones.
结果表明，无性系间树高、胸径、材积、木材基本密度和管胞长度存在显著至极显著差异。
The results indicated that the five traits like height, diameter at breast height, volume, wood basic density and tracheid length showed at least significant genetic variation among clones.
结果表明，无性系间树高、胸径、材积、木材基本密度和管胞长度存在显著至极显著差异。
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