英语释义

1. diameter at breast height

片语

average dbh平均胸径

DBH variation胸径变动

standard DBH基準胸径

dbh pf二溴羟基苯基荧光酮

dbh classes径级

dbh 4胸径

vine DBH藤本植物胸径

Mean DBH平均胸径

dbh increment胸径生长量

英汉例句

• 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着水平。

• It was found out that the value of the stand DBH at the succession stages appeared to be inclined to left side mountain-liking curve.

  对林分结构研究表明，不同发育阶段的林分林木直径分布呈左偏单峰山状曲线，林木株数随径阶变化可以分为四个阶段；

• The model between aboveground biomass and DBH is fine because of its high significance.

  地上生物量与胸径关系模型的相关性都达到极显着。

• While standard degree of closing of the plantation reached 0.85, current annual increment of DBH started to decline, and the intensity of thinning should not exceed 30%.

  林分标準郁闭度达0.85以上时，胸径连年生长量已下降，株数间伐强度以不超过30%为宜。

• Mang, maximum DBH and basal area showed significantly negative correlations with altitude while stem density did not change significantly with altitude.

  莽山乔木的最大胸径、胸高断面积之和与海拔呈明显的负相关性，而立木密度的变化规律不明显。

• However, The Mongolian pine height, density, DBH and the height and covering degree of grass under forest highly was not remarkable relevance with bird density, respectively.

  树的高度、密度、胸径、森林下草的高度，草的盖度与鸟类密度相关不显着。

• The fitted quantitative regression models could be used to forecast height and DBH of the young stands, and the forecast precision was high.

  运用所拟合的数量化回归模型预测马尾松幼林的树高和胸径可达到较高的精度。

• Maximum and average DBH of GM as well as extended gap area were significantly positively correlated with altitude and slope position.

  GM的平均胸径、最大胸径和扩展林隙面积与海拔显着正相关；

• The growth traits such as tree height, DBH and stem volume were significantly and negatively related to wood specific gravity and seemed to be independent of wood chemical components.

  诸如树高、胸径和树干材积等生长性状与木材密度呈显着的负相关，与木材化学组分似相互独立。

• In addition, the relationship between host tree DBH and oviposition site was surveyed, the result showed that the number of oviposition site wouldn't increase with the host tree DBH.

  另外还调查了寄主植物胸径与产卵刻槽数量之间的关系，结果表明，产卵刻槽不会随着寄主植物胸径的增大而增多。

• The experiments indicated that tree height, DBH and volume of superior Casuarina equisetifolia clones was faster than that of seedling plant.

  采用木麻黄优良无性系造林，其林木干型通直、冠幅大、林相整齐；应用实生苗造林，个体分化较大、生长参差不齐。

• Regulation of self- thinning is that relationship between DBH and average density of population accords with negative power function.

  樟子松种群自疏规律为：平均胸径与密度的关系符合负幂函数模型。

• The key factors affecting the yield of shoot were the quantity and DBH of living culm, which determined the quantity and quality of shoot.

  竹笋产量主要影响因子是丛立竹数和立竹胸径，决定出笋数量和笋个体质量。

• The results showed that DBH activity in ischemic cerebral tissue was significantly lower than that of control( P while the MAO activity was still normal ( P >0 05).

  结果显示，实验组动物缺血脑组织之DBH活性明显低于对照组（P＜0．001），而MAO活性无明显改变（P＞0．05）。

• Comparative experiments was conducted on the effect of one-time irrigation and fertilization on the DBH and crown density of young 107 poplar plantations of even planting density.

  对等密度107杨幼龄林进行一次性施肥灌溉措施对比试验，结果表明，一次性水肥措施对其幼林未郁闭前各龄期胸径生长量和郁闭度均有促进作用。

• The results indicated that thinning based on small DBH had positive effect on stand distribution.

  结果表明，以小径木为间伐对象的间伐作业对林分胸径分布有正面影响；

• The DBH growth of the two forests was declined greatly after 13 years, but the decrement was obviously less in shady slope forest than in sunny slope forest.

  两种林分的胸径生长量在13年生以后明显降低，但阴坡林分的降幅明显小于阳坡林分；

• The average DBH of new bamboo increased with the increasing distance from the tree.

  随距阔叶树基干距离的增加，新竹平均胸径迅速增加。