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Regression equations for different DBH groups are establisheded by studying the relations between tree height and DBH. 6 研究了树高与枝下高的相关关系，选出的各分组回归方程的复相关系数为0.;119-0
Families mean broad sense heritability for tree height was 86.67 per cent, for DBH 80.01 per cent. 本试验估算的广义家系平均遗传力树高为86.;67%25;胸径80
In addition,the specific gravity of wood (SGW) decreased with the tree height increasing. 木材的基本密度随树高部位上升而有递减趋势。
Baita Mountain after years of afforestation, tree height of forest, Qujingtongyou. 白塔山经过多年绿化，树高林密，曲径通幽。
Crown distribution diagram of the community. The crown depths were the difference between tree height and height of lowest leaves. 群落的树冠分布图树冠深度为树高与叶下高的差值。
There and then he calculated what force from the earth would hold the moon, and compared it with the known force of gravity at tree height. 当即,当时当地牛顿当即测算了地球要吸引住月球需要多大的力,并将其与果树高度的已知地球引力作了比较。
The estimated genetic gains for tree height, DBH, bark thickness and tannin content were 25.67%, 38.27, 15.62% and 10.57% respectively. 遗传增益:树高25.;67%25、胸径38
In trial locations the increment from Yunnan provenance was 13% in tree height and 12% in DBH greater than the mean value of all provenances. 试验林中,云南种源平均高生长大于种源平均值13%25,胸径生长大于种源平均值12%25;
Mean tree height and DBH in the forest types increased with increasing altitude, when those in the Larix gmelini woodland were excluded. （3）乔木层的直径和树高分布清晰地反映了群落的水平和垂直结构。
After planting, tree height (H), diameter at ground level (D) and diameter at breast height (DBH) were measured at regular intervals. 造林后，定期观测树高、地径或胸径。
The order of effects of main characters of increment on volume was brest diameter,tree height,tree crown ,diameter of first main branch and branch height,respectively. 育种主要生长量性状对材积的影响大小顺序是胸径、树高、冠幅、侧枝粗细和枝下高。
Results showed that tree height and DBH and genetic gains of volume of I108,I107I,I-214 increased 12.53%,14.30%and 36.71%compared with contrast,respectively. 结果表明:I108、I107、I-214的树高、胸径、材积遗传增益;分别比参试群体平均提高12.;53%25、14
The correlation between frequency variations of enzyme bands and tree height, DBH and volume was very small. Only B45 band came up to or closed significant level. 酶带频率变异与树高、胸径、材积生长相关性很小,只有B_(45)酶带与生长相关达到或近于显著水平。
As co- mpared with controls,tree height is over 13.8%,DBH is over 29.1%,volu- me is over 69.9%,the genetic gains of tree height and DBH are over 9.1% and 17.5%. 通过综合评定;从22个家系中选出5个优良家系;与对照相比;树高大13.;8%25;胸径大29
The main factors which decided the characteristics of Larix Chinensis forests were analyzed, the order is DBH?tree height?age?Area at breast height?species abundance. 通过主成分分析,对太白红杉林特征起决定作用的因子依次是:胸径?树高?年龄?胸高断面积?物种丰富度;
The difference was not significant.The experiments indicated that tree height,DBH and volume of superior Casuarina equisetifolia clones was faster than that of seedling plant. 试验还表明，采用木麻黄无性系造林，其树高、胸径、材积的生长明显优于木麻黄实生苗的生长速度。
Thereinto the measure result of cover degree of canopy and tree height gained the evidently progress.Ulteriorly it discussed the future direction of development. 其中对树冠盖度和树高测量的结果取得了显著的进展，进一步讨论了未来发展的方向。
The result showed that their growth index such as tree height, diameter, wood production per plant and yield were significant difference among 16 pine tree lines. 结果表明：16个湿地松高产脂品系的树高、胸径、单株材积等生长指标及产脂量表现差异显著或极显著；
Three tree factors of diameter at breast height,tree height and tree volume of Japanese larch had been studied by using 5 empirical formulas and grey GM(1,1)model in this paper. 对日本落叶松三测树因子采用了5个经验方程和灰色GM(1,1)模型进行研究,经验方程中选中了柯列尔式,柯列尔式的各测树因子的残差平方和均小于GM(1,1)的残差平方和。
The early growth model including fitting equation between DBH and months,between tree height and months,and between volume and tree height,were studied. 对三倍体毛白杨在湘南地区的早期生长过程进行了分析,并对胸径、树高、材积等生长模型进行了研究。