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- tree height distribution 树高分布
- 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。
- Skewness and inequality of height distribution of young pinus sylvestris var. Mongolica stands introdrced on sandy soil with lower limited precipitation for tree survival and normal growth. 降水量下限引种区沙地樟子松幼林种群树高分布偏斜度和不整齐性。
- 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
- Two wave systems travelling in different directions are superposed and the wave height distribution of the resulting system is discussed. 正>从海上的实际观测资料看来,单纯的风浪或涌和混合浪(卽风浪和涌或不同来源的海浪相叠加)的被高分布规律有显著的差别。
- 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。
- The atmospheric aerosol has important influence to atmospheric radiation and light propagation, but scale height is the key parameter which reflects aerosol height distribution. 大气气溶胶对大气辐射和光传播具有重要影响,而标高是反映气溶胶高度分布特征的关键参量。
- 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。
- 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。
- The results indicated that the multi-fractal dimensions could describe the transferrin surface geometry features and the uniformity of surface comparative height distribution well. 结果表明:多重维数分形谱能更好地反映与受体作用前后转铁蛋白分子的表面形态特征和分布的均匀程度;
- 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;
