查询词典 crown canopy

The unique characteristis of this model are that the influence of terrain had been considered in the radiation and energy balance equations of forest crown canopy and land surface.

与其它中、小尺度模式相比其独特之处是：此模式在地表与植被冠层建立的辐射平衡方程和能量平衡方程中，均详细地考虑了坡度、坡向的影响。

The results showed that the sex ratio of trees was 1 m 2 f, and the natural T. cuspidata tree was able to sexually reproduce for many years. Male trees had fecundity when the diameter at breast height ranged from 1.5 cm to 92 cm, while female trees had fecundity when the DBH from 9.5 cm to 68.1 cm. Male trees typically flowered at the age about 20 years earlier than female trees. The numbers of microstrobili were 3 times more than that of megastrobili, and only 1/10 megastrobili developed into seed. The numbers of strobili and seed were correlated with DBH, crown diameter and height of trees; however, no significant correlations were observed with other site factors. Numbers of strobili decreased from the upper to lower canopy layers, while the quantity of seed decreased from the middle, upper to lower canopy layers. Seed-setting rate increased from the upper to lower canopy layers. Numbers of strobili and seeds in different directions of the canopy were not uniform, but the differences weren't significant.

结果表明：现实东北红豆杉天然种群中，♀♂性比为1：2；天然东北红豆杉有性生殖持续时间长，雄株胸径在1.5~92cm，雌株胸径在9.5~68.1cm保持生殖状态，雄株较雌株早约20年进入花期；天然东北红豆杉小孢子叶球数量平均为大孢子叶球数量的3倍，大孢子叶球转化为果实的数量不足1/10，孢子叶球数量、结实数量与样株的胸径、冠幅、树高显著相关，与其他立地因子相关不显著；孢子叶球数量在冠层间的分布呈现由上至下的递减规律，而结实数量在冠层间沿中、上、下递减，结实率沿冠层自上而下递增；孢子叶球与结实数量在树冠不同朝向上也呈现出一定的特点，但总体上差异不显著。

A stand of trees in which at least 80 percent of the trees in the main crown canopy are of a single species.

指一片主要树冠至少有80%属于同一品种的林木。

Increases in water conservation are not distinct in soil and litter while distinct in the crown canopy.

珠防林幼林的综合持水能力因恢复措施以及林分类型不同而存在差异。

Mutual protection against wind is distinctly recognizable at the crown canopy.

在林冠层可以清楚地看到互相保护免遭风害的作用。

The results show that: fruit-branch, shape of tree and crown canopy are the there main factors in body structure, and yield is obviously related to fruit-branch; sum of female-flower and flowering in .

结果表明：(1)树体结构中结果枝、树形、冠幅是影响单株产量的主要三个因子，结果枝与单株产量显著相关。

In order to study the small climate of fore st and its effects on biological community to research into some processes of bi ochemistry and physical chemistry in the ecol ogical system of forest, we have to know the air humidity of woodland gro und,woodland interior,the interior of crown canopy and the surface of crown can opy.

为了研究森林小气候及其对森林生态系统中生物群体的某些生化过程、物化过程的影响，我们必须测定林内地面、林内、林冠内以及林冠表面与林冠上空的空气湿度。

Modeling the openness distribution and solar radiation transfer within tree crown canopy is presented. The modeled radiative transmission fits the measurement data very well.

对稀疏林地，建立了&考虑开放度的树冠辐射传输模型&，仔细考虑了太阳辐射在树冠和林地内的传输过程，与用于林地辐射小气候研究的模型相比，计算方便，结果可靠，可望用于遥感反演研究。

This paper evaluates the water conservation effects of the young forests of the Shelter Belt Program of the Zhujiang Valley from three hydrologic levels of crown canopy, litter layer and soil layer, based on field investigations and measurements.

本文在对珠防工程监测样地调查、测定的基础上，从林冠层、枯落物层和土壤层3个水文层次对珠防二期工程幼林的综合持水能力进行了评价。3 a-4 a生珠防林幼林的综合持水量在2 355.25-2 457.08 t/hm^2之间，比荒山高

The results revealed that the crown canopy can effectively retainrainfall, the mulch can intercept runoff, and the roots comprehensive functions being so significant, hence the measure is worth spreading for slopeland control in local area.

本文通过对张家口地区生物措施在减弱和控制土壤侵蚀中的原因及效用分析，结果表明林冠可有效截流降雨，枯枝落叶可有效拦蓄地表径流，植物根系可固结土壤，减小冲刷，综合作用显著，很值得在当地的坡地治理中推广应用。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了