DBH

The survey of variation in red heart wood ratio between individual and within a single tree showed that red heart ratio rose with the increasing of DBH and growing ring.

通过对红心材株间和株内变异研究，发现株间红心率变异的一般趋势是随着植株胸径和年龄的增长而增长。

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The genetic gain of height, DBH, individual volume were 10. 71%, 37.97% and 113.08% comparing with the control, and the realistic gain of these traits were 14. 25%, 47. 61% and 140. 01% respectively.

现实增益分别为14.25%、47.61%和140.01%。

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The DBH with soil urea enzyme 、 MB-C 、 SOC and PH all had significant correlation.

林木胸径生长与土壤脲酶、微生物量C、 有机C和PH呈极显著相关,土壤蛋白酶、过氧化氢酶和蔗糖酶与土壤PH值呈显著或极显著相关.

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A new fluorometric method has been developed for the determination of trace chromium, based on the fluoresence quenching effect of Cr ( ⅵ) 2. 6.7-trihydroxy-9 ( 3, 5-cli-bromo-4-hydroxyphenyl) fluorone ( DBH-PF)-emulgent OP system.

本文基于Cr（Ⅵ）-二溴羟基苯基荧光酮（DBH-PF）-OP体系的荧光熄灭效应，提出一种测定痕量铬（Ⅵ）的新荧光方法。

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In no-gaps there were no individuals of DBH ranging from 1 to 3 cm.

非林隙白毛新木姜子1～3cm径级没有分布。

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For trees ( DBH> 2.5), species diversity and evenness indices increased from 1982 to 1994 in all the three forests.

就乔木（DBH＞2.5cm）而言，3个样地的物种多样性和均匀度指数从1982年至1994年都已增长。

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Seven elite trees are selected based on the DBH growth and the stem form.

以胸径生长量和干形作为选择指标，从东部黑核桃优良家系中选出速生、干型好的优树7株。

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The selected provenances'mean height, DBH, individual volume was 8.12 m , 12.49 cm , 0.0552 m 3 , respectively.

入选种源平均树高8.12m, 平均胸径12.49cm;平均单株材积 0.0552m3.

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In the first-degree site condition, the mean height and DBH of the sapling forests under intensive management increased by 21% and 48.4% compared with under extensive management, respectively.

Ⅰ级立地：集约经营的幼林平均高、平均胸径比粗放经营增长21%和48.4%；

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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；

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Height growth and DBH growth of the same strain had significant differences in different soil types.

在不同土壤类型中同一品系的高生长及径生长差异显著.

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Results showed that DBH constantly increased along with the thinning intensity. The bigger thinning intensity was, the greater DBH grew.

研究表明，杉木人工林胸径随着间伐强度的增大而增加，并且间伐强度越大，胸径增长量越大。

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In HC 1 solution ( 0.10～0.30 mol · L ~ (-1 )) , Sn , DBH-PF and emulsifier OP form a ternary complex.

在0.10 ～ 0.30mol·L~ ( -1 ) 盐酸介质中,锡与DBH-PF、乳化剂OP形成三元络合物.

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AIM: To observe the expression of tyrosine hydroxylase ( TH) and dopamine beta hydroxylase ( DBH) in the lumbar sympathetic ganglia neurons of the patients with Buerger disease of lower limb.

目的：研究下肢Buerger病患者腰交感神经节神经元中去甲肾上腺素合成酶酪氨酸羟化酶（tyrosine hydroxylase，TH）和多巴胺β羟化酶（dopamine beta hydroxylase，DBH）的表达变化。

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The selected families'mean height , DBH, individual volume was 8.1 m , 16.5 cm , 0.1132 m 3 , respectively.

入选家系平均树高8.1m, 平均胸径16.5cm;平均单株材积0.1132m3.

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The main results were as follows: 1. The mixed and fir plantations' DBH, tree height, individual volume, the timber volume are both present the same rule in the different slope: down slope middle slope upper slope.

主要研究结果如下：1.杉木-闽粤栲混交林与杉木纯林胸径、树高、出材量和蓄积量随坡位的不同均表现为下坡中坡上坡的变化规律。

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The natural logarithm of DBH ( lnD) and square diameter ( D~ 2) were included in the predicting models of diameter increment for all 15 species.

在全部15个树种的直径生长量预估模型中，均包含了InD和D~2二个变量。

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The second category ( DBH ≥ 20cm and H ≥ 6 m) has 1445 plants making up of one big arbor and 368 middle arbors and 1076 small arbors;

第二类（胸径≥20cm与树高≥6m）共1445株，其中大乔木1株、中乔木368株、乔木1076株；

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Double immunofluorescent staining showed that DBH and AP-2α co-existed in the cells of the spinal cord.

免疫荧光双标显示DBH和AP -2 α共存于脊髓神经元内.

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