树冠

油茶（CamelliaoleiferaAbel）是我国特有的木本食用油料树种，因其树形高大，树冠密集。

Camellia oleifera Abel is a seed of woody edible oil material tree endemic to China , with tall form and dense crown .

在移植同时用ABT与IBA溶液制成黄泥浆处理大苗木樟树根部，并对树冠进行强度修剪效果更佳。

Meanwhile , when the tree 's root is treated by the yellow mud made of ABT and IBA solution and the crown is trimmed , better results can be obtained .

大雪把树冠变成了白色。

Snow had whitened the tops of the trees .

树冠在微风中婆娑摇曳。

The tops of the trees rippled in the breeze .

他正站在梯子顶上锯他那颗苹果树的树冠。

He was up a ladder sawing off the tops of his apple trees

树冠浓密，覆盖着厚厚一层松针。

The trees formed such a dense canopy that all beneath was a deep carpet of pine-needles .

现在有关树冠冠径（K）和干直径（D）之关系的研究相对较少。

This study focuses on10 Maoershan main broad-leaved tree crown diameter of the canopy ( K ) and stem diameter ( D ) relationship .

6、8月，叶中POD活性高低分别与各次新梢生长量和树冠体积（8月）大小呈负相关；

In April , June and August , the activities of POD in leaves were negatively correlated with shoot length in Spring , Sum-mer and Autumn and canopy volume .

POD活性与树高、干周、冠径、树冠体积呈显著负相关，与砧木的矮化性呈负相关。

The POD activity have a strikingly negative relationship with the height of tree , trunk girth , diameter of crown , the volume of the tree crown , and the dwarfed nature of the stocks .

苏联树木绿冠化学加工概况NAR值（净同化率）在结果初期最大，然后又下降，表明其随着树冠生长而变化。

GENERALITY OF CHEMICAL PROCESS OF GREEN CROWN OF TREE IN USSR and then it decreases which means it varies with the growth of tree crown .

但不同密度的间作系统中PAR值不同，表现为明显的株行距效应和树冠开张、枝组结构、林间郁闭度等因素对树冠受光的影响。

PAR values were different in different density intercropping system , showing the obvious spacing effect , and showing the canopy opened , branch group structure , canopy density and other factors affected canopy to accept light .

树体产量、质量形成集中分布于树冠外围1m左右的范围，冠内相对光强在23%，是丰产优质的基线。

The yield and mass of tree mainly distribute in one meter or so around the tree crown , relative intensity of illumination inside the tree crown is 23 % , which is a base line for high yield and superior quality .

根据290块I-69杨标准地调查资料，采用典型相关分析方法对树冠特性与生长的关系进行了定量分析；

According to the survey data of 290 valuation areas , the authors quantitatively analyzed the relationship between the crown characteristic and growth with canonical correlation analysis method ;

采前用0,0.25%，0.5%，1.0%Ca（NO3）2溶液及分别加入20×10-6IAA后喷洒甜柿树冠和果实。

The tree crown and fruit of sweet persimmon were sprayed withCaCl_2 solution at 0 , 0.25 % , 0.5 % and 1.0 % , alone or in combination with 20 × 10 ~ ( - 6 ) IAA .

黄色树屋造这个书屋是为了和外星人接触。Nelson写道“在树冠中一颗闪亮的豆子，很容易想象圆顶屋肩负和外星生命接触的使命。”

This treehouse was constructed with the express purpose of communicating with outer space . " A sparkling beacon among treetops , it is easy to imagine the dome succeeding at its mission to make contact with alien life , " writes Nelson .

冠层控制近似地决定了CHM中真实树冠区域，忽略无效值的存在，这为后续的CHM优化和单木分离提供了较为准确的树冠范围。

The crown control determined the real tree crown areas in CHM approximatively , neglected existing of the invalid values . Relatively exact crown areas were provided for the following CHM optimization and individual tree isolation .

采用地理信息系统（GIS）对冠层和空隙斑块进行多种水平和垂直尺度的分析，冠层与空隙斑块之间的镶嵌格局因种群而异，这种格局可基于树冠投影用Shannon-Wiener多样性指数进行定量描述。

Canopy and gap patches were analyzed at multiple horizontal and vertical scales using geographic information system ( GIS ) . The mosaic patterns of canopy and gap patches are different among populations , and could be quantitatively described with the Shannon-Wiener diversity index based on crown projection .

本试验于2005年10月10日按树冠直径100g／m的量的氯酸钾水溶液对石硖龙眼淋施的氯酸钾水溶液，以清水作为对照。

This experiment used the " ShiXia " longan trees cultivated in field as test material and applied them with liquor of potassium chlorate in lOOg / m each mater of the tree crown and water CK on Oct.10 ~ ( th ) .

枝下高、树冠半径动态生长可用Schumacher方程来预估，冠长动态生长可用Korf方程来预测。

The Schumacher equation can be used to predict the height of living branches and crown radius dynamic growth , the Korf equation can be used to predict crown length dynamic growth .

hm-2，分布于0-1.5m的空间层中，这种均匀的空间分布规律为树冠火的发生创造了条件，从而加大了杉木人工林生态系统的火险性。

Hm-2 and evenly distributed from 0 to 1.5 m above the ground in the Chinese Fir plantation ecosystem of 11 years old . Therefore , it created favourable conditions for the crown fire and a higher forest fire risk .

树冠投影区域（0.5r区和1r区）的土壤平均含水量低于其外缘区域（1.5r区和2r区）。

The average soil moisture content in the vertical projection area of the tree crown ( 0.5r plot and 1r plot ) was lower than the outside area ( 1.5r plot and 2r plot ) .

通过对I-69杨和NL-80203树冠生长特性的分析，对同龄杨树林带抚育间伐技术进行了探讨。

According to analysis of crown growth characteristics of two poplar species ( I-69 , NL-80203 ), the paper studied the tending and managing technology of poplar tree belts .

对于影像上树冠比较容易识别的低郁闭度林，提出了一种利用NDVI等值线结合树冠反射率最大点提取树冠的方法。

As to the forest part with low canopy density , which is easy to identify clearly in the images , a method of extracting the crown , with the combination of NDVI contour lines and the points whose reflectivity being the greatest in crowns , was proposed .

基于枝条着枝深度（DINC）和林木变量所建立的树冠形状模型包括：基径、枝长、着枝角度和弦长等预估模型。

Crown profile models , including branch diameter , branch length , angle of origin , and branch chord length , were developed from branch attributes and tree variables .

本研究把中心点&四分面和我们提出的树冠权重更新面积（TCWRA）结合起来，运用于野外植被资料的取样。

In this study the tree canopy-weighted regeneration area ( TCWRA ) method was developed and used together with the point-centered quarter method ( PCOM ) in the field investigation .

树冠上从上到下，长枝平均年龄逐渐增大，分枝角度逐渐升高.种子主要集中分布在距地面180～320cm的体积冠层中，这一冠层中的种子数占植株种子总数的51.3%。

From the top to the bottom , the average age and the divaricating angle of long shoots increase 51.3 % of the seeds distributed in 180 ~ 320cm layer from the ground .

白榆根系数量在水平向上主要分布于树冠投影区域（0.5r区和1r区），其外缘区域（1.5r区和2r区）的根系数量随着与树体距离的增加而减少；

The number of Ulmus pumila roots distributed mainly over the vertical projection area of the tree crown ( 0.5r plot and 1r plot ), and the number of the outside area ( 1.5r plot and 2r plot ) decreased with increasing distance from the tree ;

通过为期7a的圆冠榆引种栽培实验，研究了圆冠榆5个品种的树冠圆满度、枝条生长量、耐寒性和抗虫能力，选出了适于哈尔滨地区栽培的圆冠榆优良嫁接无性系类型。

The canopy width , growth increment of branch , cold resistance and insect resistance of Ulmus densa Litw introduced into Harbin region from Xinjiang Province were studied by culture experiment for 7 years . The superior clone of graft about Ulmus densa in Harbin regions was selected .

研究结果表明：（1）Hegyi竞争指数，树冠重叠指数和生长空间指数三者对于林木生长状况优劣的反映是一致的，可作为空间优化指标。

The results are as follows : ( 1 ) Crown overlapping coefficient , Hegyi competition index , Growth space index can reflect the quality situation of tree growth similar and can be used as indicators of spatial structure optimization .

在树种评价的过程中采用LAI-2000型树冠仪测定树种的叶面积指数，同时测量树木树冠面积，二者乘积可近似看作树种绿量值。

In the process of the trees ' evaluation , it uses the LAI-2000 apparatus to measure the leaf 's area index and at the same time the area of the trees ' crown and multiplication of the both can be look as the vegetation quantity of trees .