冠幅

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 .

毛白杨无性系冠幅、冠长与生长的相关性研究

Study on crown width , crown length and growth of different Populus tomentosa clones

株高、冠幅、花径是矮牵牛的重要观赏性状。

Height , breadth and diameter of corolla are the important ornamental characters of petunia .

在胁迫环境中，植物高-冠幅半径关系和盖度-密度关系决定了地上部分M-N关系。

Plant height-crown radius relationship and canopy-density relationship determine M-N relationship in stressful environment . 4 .

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 .

根据建立的一个几何模型，我们提出高-冠幅半径关系和盖度-密度关系决定了M-N关系的第二个科学假说。

Based on a geometric model , we hypothesize that plant height-crown radius ( H-r ) relationship and canopy-density ( C-N ) relationship determine the aboveground M-N relationship .

树型结构中最佳的冠幅宽为4.7m，冠长越长越好。

The best crown width was 4.7 m , and the longer crown length , the tree situation was better .

在客厅入口处，配置一株树桩、插花、五针松或罗汉松等，高度不超过1.8m，冠幅不超过1m。

Entrance install in the living room a stub tree stake , flower arrangement , five needle pine or pine etc. , the high degree is not to exceed 1.8 ms , There are not exceed 1 m.

这些树主干明显，树体高大，一般高20m，最高50m，最大单株冠幅占地0.13hm2；胸径1m以上的大树有70多株，2m以上的8株；

These trees have distinct trunk , high and large crown , generally 20 m high or so , the highest 50 m , the largest crown about 0.13 hm2.There are over 70 huge trees with diameter over 1 m , 8 trees with diameter over 2 m.

从各向同性的半方差模型的参数来看，柽柳（Tamarixchinensis）属于聚集性分布的球型模型，其空间结构比率高，这表明在这一地区柽柳的冠幅分布变化较小，25m的抽样步长合适；

According to parameters of the isotropic semivariance model , The spatial distribution of Tamarix chinensis can be described with spherical model of cluster distribution and proportion of spatial structure was high , which indicated less change and the lag of 25 m is appropriate at this area .

对于中度退化草地，在高度与冠幅之比（chw）不变的情况下，当45°≤太阳天顶角sza≤75°时，不同几何形状植株的总反射率之间无显著差异；

For the moderately degraded grasslands , if plant crown height-to-width ratio ( chw ) was invariant , when 45 °≤ solar zenith angle ( sza )≤ 75 °, no significant differences occurred in scene reflectance ( R ) for different plant crown shapes ;

NL-80351干形园满通直、尖削度小、分枝角度小、冠幅窄、抗性强，未发现发生病虫危害，一般经营措施下林木生长旺盛，已成为孝感市主栽品种。

NL-80351 trunk shape was full and straight , small pointed whittle , small branch degree and narrow crown , strong resistance , found non appearance of disease and pests damages , trees grew vitality under general managing measures , that had become dominant cultivars in Xiaogan city .

冠幅对果树的产量有重要影响。

The crown size affects the yield of fruit tree s obviously .

一个新的单木竞争指标&相对有效冠幅比

A New Single-tree Competition Measure ── Relative Effective Crown ratio

而地上部分植株在地径、树高、冠幅、二次枝数和单株有效股等项指标均表现出随着密度的增加而减少的趋势。

Showed declining trend with the increasing of density .

黑琥珀李株产和冠幅与土壤养分相关的研究

Study on Relationship between Individual Yield and Crown of Black Amber with Soil Nutrition

产量与茎粗和冠幅之间具有极显著正相关。

There were significant and positive correlations between yield and stalk diameter , width .

基于冠幅及植株高度的檵木生物量回归模型

The Regression Model of Loropetalum chinense Biomass Based on Canopy Diameter and Plant Height

冠幅，总分枝数与重量的异速指数随密度增大而减小；

Allometric exponents between width , branch number and mass decreased with increasing density ;

大苗和冠幅较大的树种，可降解生态垫抑制杂草的效果更为明显。

Its effect on weed controlling was better for saplings and species with larger crown .

107杨树阳性冠幅与胸径关系的研究

Studies on Relationship Between Crown Size And Tree Diameter at Breast Height of 107 Populus

不同配方施肥对无患子树高、地径、冠幅的影响较大。

Formula fertilizations had great influences on height , ground diameter and crown widthof Sapindus .

不同密度湿地松纸浆原料试验林早期冠幅生长模型研究

Study on early crown diameter growth model of Slash Pine pulpwood experimental stands with different densities

结果表明，主干较矮，树冠为自然半圆头形，冠幅略大于冠厚。

Result shows that the trunk was short and the canopy shaped as the natural semicircle .

同时分析了冠幅与造林密度的关系。

Were studied . Meanwhile , the relation between crown dimension and the planting densities was analyzed .

基于冠幅直径和植株高度的灌木地上生物量估测方法研究

A study on the estimating method of shrub upper biomass based on the crown diameter and plant height

不同个体间液流速率差异显著，冠幅是影响个体间差异的主要形态特征；

Difference can be seen at different trees , respectively , canopy size is the major influenced factor .

林木冠幅（平均投影面积）对近林带处小麦的产量影响较大。

Among the influent factors , the projection area of tree crown has a great affect on wheat output .

其中惠安种群以扩大冠幅占领较大的横向空间，种群分化程度最大；

The Huian population occupied a larger transverse space by extending crown amplitude and its differentiation degree was highest .

胸径、材积、冠幅、新梢生长量随造林密度减小显著增大。

The DBH , volume , crown breadth and the growth of shoots increase obviously as the density decreases .