地径

根据生长期间的棒子形态指标的动态测定，对苗高和地径进行了年生长规律回归模拟，R在0.9以上，因而可用所得的回归模拟方程对苗木生长进行预测。

According to dynamic measuration of morphological indexes , regression simulation of yearly growing rule was done on seedling height and diameter .

叶片的超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和过氧化物酶（POD）活性及树干地径和树干直径的变化进行了分析比较。

Activities of SOD , CAT and POD in leaf and changes of ground diameter and trunk diameter of Eucommia ulmoides Oliv .

应用正交实验设计，对新播长白落叶松苗期进行了N、P、K施肥试验，结果表明：N、P影响苗高、地径、植株干物质重量；

Using orthogonal test design , fertilizer tests with N , P , K were conducted during seedling stages of Larix olgensis which were newly sowed .

结论苗高、地径的生长动态符合S型生长曲线，可用Logistic方程拟合。

Conclusion The growth pattern of the height and diameter at ground is accordance with S curve and can be simulated with Logistic equation .

川鄂连蕊茶种群的生殖分配是地径大小的函数，拟合回归方程为：雨滴谱分布函数的选择：M-P和Gamma分布的对比研究

Comparative study of exponential and gamma functional fits to observed raindrop size distribution

在CO2浓度倍增条件下，研究了油松、侧柏、元宝枫和刺槐的苗高、地径、叶生长和养分含量等方面的变化。

The growth of Pinus tabulaeformis , Platycladus orientali , Acer truncatum and Robinia pseudoacacia under doubled CO2 concentration and contrasts were investigated and compared .

地径广义遗传力（h2）为（82.61±8.42）%，遗传变异系数为15.28%。

Broad heritability of collar diameter is ( 82.61 ± 8.42 ) % , genetic variation coefficient is 15.28 % .

生长性状（苗高、地径）与单株叶面积和PP极显著正相关。通过聚类分析，19个无性系可划分为三类。

The two growth characters were significantly correlated with both leave area of individuals and PP. Through cluster analysis , nineteen clones can be divided into three categories .

对高CO2浓度和土壤干旱胁迫响应的研究结果表明：干旱胁迫可使杨柴根系伸长，根生物量、地径、主茎高和茎生物量下降；

The results showed that the soil drought stress lengthened root length , decreased the dry biomass of root and stalk and the growth value of basal diameter and stalk height .

对苗木苗高、地径、冠幅和叶绿素含量等指标数据进行回归方程的拟合，计算出相应指标最大值时的N、P、K施用量。

Through regression equation fitting on index data of seedlings ' height , ground diameter , crown width and chlorophyll content , we calculated the application content of N , P , K when the relevant indexes were in maximum .

随着重金属处理浓度的增加和胁迫时间的延长，植物高生长和地径生长均受到不同程度的抑制，同时比叶重显著下降（P0.01）。

Height growth and basal diameter growth of plants were subjected to restriction of different extent with the increase of the concentration of heavy metal stress and the extension of time .

超过20mg·kg-1对杉木幼苗地径与高度生长产生明显抑制作用；

When the concentration was above 20mg · kg - 1 , the growth of height and diameter at ground layer was inhibited ;

提出以地径（D）和苗高（H）作为柚木苗木分级的质量指标，得出以下分级标准：Ⅰ级苗：D>25cm，H>150cm；

It draws a conclusion using ground diameter ( D ) and nursery height ( H ) as quality indexes that standards for classification can be detailed as : Grade I : D > 2.5 cm , H > 150 cm ;

利用统计学原理对来自吉林、辽宁两省的10个种源的花曲柳在吉林省柳河兰山林场的苗期生长（1a生苗高、地径）情况进行了统计分析。

The growth of 10 provenance of Fraxinus chinensis in the seedling stage from Jilin Province and Liaoning Province was analyzed by using the theory of statistics .

本文采用二次正交旋转组合设计方法，建立了N、P、K、空间条件、时间条件五项技术措施与马尾松苗木地径关系的数学模型。

Using quadratic orthogonal rotation design , with the aid of computer , this paper established a mathematical model of ground diameter for masson pine ( Pinus massoniana ), which related to fertilizer nitrogen , fertilizer phosphorus , fertilizer potassium , density and seedling date .

根据树高、地径与施肥量建立的氮磷钾肥效模型分析结果表明，仅地径氮元素单元肥效模型的F检验显著。

According to the model analysis built on the effect of nitrogen , phosphorus and potassium balanced application to tree height and ground diameter , only the F-test based on the model of ground diameter and nitrogen acts significantly . 2 .

通过对山杏进行种源苗期、林期试验和RAPD分子标记实验，结果表明：种源间苗高、地径、冠幅等性状存在极显著差异，且广义遗传力较高；

The result of provenance trial and RAPD molecular markers experiment of Armeniaca sibirica showed that the characters such as height , ground diameter and crown , were distinct different among provenance , genetic ability is high .

单叶重、株高、地径、叶重比、叶绿素（a+b）、叶绿素a以及叶绿素b含量等均在N3水平下达到最大值。

The highest values of biomass per leaf , plant height , basal diameter , leaf mass ratio , contents of chlorophyll ( a + b ), chlorophyll a and chlorophyll b were found for N_3 treatment .

以5个黑杨派（P.deltoides）杨树无性系为材料，利用Logistic方程对各个无性系的1a生扦插苗木的苗高、地径的年生长节律进行拟合。

Logistic equation is applied to fit annual growth rhythm in seedling height and ground diameter for one & year old cutting seedling from 5 clones of P. deltoides .

结果表明：矮紫杉的地径生长缓慢，在年生长周期中有两次生长高峰，而1a生枝径相对生长较快。

The results showed that : The growth of diameter at foot is slow , and there are two growth peaks in a year . The shoot diameter growth is relatively faster .

4年后阔叶树平均树高2.2m，平均地径2.1cm。

The average height of broadleaved trees 4 years after the burn is 2.1 m and averaged ground diameter is 2.2 cm .

扦插苗第2年秋季高度为23～35m，地径为2～4cm。

The height and ground diameter of the cuttage seedlings are 2.3 ~ 3.5 m and 2 ~ 4 cm respectively in the next autumn .

地径为-0.04～0.18cm；

Diameters at ground level - 0.01 ~ 0.18 cm ;

对来自27个不同种源的云南松（PinusyunnanensisFr.）进行苗期试验，测定苗高和地径生长量，并对其21个月生的苗高和地径进行方差分析。

A seedling test including the measure and analysis of variance of the height and diameter at ground level of 21-months old seedlings of 27 different provenances of Pinus yunnanensis Fr. was carried out .

在咸宁1年生播种苗平均地径为0.69cm，平均苗高78.18cm；

In Xianning the average basal diameter of one-year-old seedlings was 0.69 cm and the average height was 78.18 cm .

其中，Fv/Fo、Fv/Fm、Fv′/Fm′、ΦPSⅡ、ETR及QP等几个参数与苗高、地径及叶绿素含量呈正相关，多数达到显著或极显著相关水平；

There is positive correlation among seedling height , basal diameter , the content of chlorophyll and the parameters of Fv / Fo , Fv / Fm , Fv ' / Fm ' , Φ PS ⅱ, ETR and QP , most of which reach marked and remarkable correlative levels .

在土层深厚、土壤疏松、水肥条件较好的土地上生长极其显著，年均地径生长2cm，年均高生长1.5m。

It shows remarkable growth which is expressed by 2 cm of annual average diameter growth and 1.5 m of annual average height growth under the favorable conditions of deep and soft soil , sufficient water and fertilizer .

0.0125、0.025g/mL的落叶松根水提物，0.0125g/mL的落叶松皮水提物对胡桃楸幼苗苗高、地径生长的促进作用显著。

Seedling height and collar diameter of Manchurian walnut seedlings were significantly accelerated by 0.0125 g / mL root and bark larch aqueous extracts .

ABT系列与高浓度（≥800mg·kg-1）的IBA对促进苗木高生长有明显作用；3种参试药品对苗木地径生长的影响不显著。

And that ABT series and high concentration of IBA (≥ 800 mg · kg ~ ( - 1 )) can remarkably promote the height growth of seedlings but all the 3 hormones have no significant effect on the basal diameter growth of seedlings .

在生长季节地径4-5cm的柽柳日平均耗水量1.25L，整个生长季节耗水量为150.8L。

In growth season the daily consumption of water was 1.25L for a tree its stem diameter was 4-5cm ; in total growth season it spent 150.8L of water .