树种

西安城市绿化树种应用存在的问题及对策

City Greening Varieties of Trees Application Existing Problem and Measure in Xi ′ an

橡胶生产的效率不仅决定于树种，而且还要决定于出胶质量。

The efficiency of rubber farming is determined not just by the varieties of trees but also by the quality of the tapping .

许许多多树种濒临灭绝。

Hundreds of tree species face extinction

中国有世界最古老的树种--水杉。

China has the world 's most ancient tree species -- metasequoia .

对于槭属和梣属等种子有翅的树种，可以用摇树机摇落。

The release of winged-seed from Acer and Fraxinus species , can be encouraged by shakers .

在中国，桃作为一园艺树种，其历史远比任何其它已知的地区都早。

The history of the peach as a garden crop in China far antedates any claim that can be substantiated for other geographic areas .

当这种情况发生的时候，很多树，比如核桃树、橡树和松树，就会完全依靠所谓的“会播种的寄宿伙伴”，比如鸟的帮助，鸟会把树种带到新的地点。

When that happens , many trees like walnuts , oaks and pines , rely exclusively on so-called " scatter hoarders , " such as birds , to move their seeds to new localities .

在所有森林树种之中，橡树是最为优良、最为有用的一种树木。

The oak is one of the finest and most useful of all our forest trees .

闽北阔叶树种生态组的Fuzzy划分闽北木荷人工林生产潜力的研究

Fuzzy cluster analysis of ecological group of deciduous trees in the North Fujian

各树种养分利用效率为P或Mg>Ca>K>N。

The order of nutrient use efficiency was P or Mg > Ca > K > N for all tree species .

基于GIS技术的福建省主要桉树树种用地适宜性及风险评价

Evaluation on Suitability and Risk of Land Resource Growing Staple Eucalyptus Species in Fujian Based on GIS

用树木年生长周期中πP值的最低值和年变幅表示被测树种耐旱性强弱，得到了较为满意的结果。

By means of using the minimum value of π _P and the annual variation value of π _P express the drought-endurance , the results are satisfactory .

珍稀濒危树种毛红椿微卫星DNA分离及SSR反应体系优化

Isolation of Microsatellite DNA from Endangered Tree Toona ciliata var . pubescens and Optimization of SSR Reaction System

本文采用水性高分子异氰酸酯胶（API胶粘剂）对东北主要树种落叶松、桦木和柞木的胶接性能进行了研究。

Bonding properties of Larch , Birch and Oak with aqueous polymer isocyanate adhesives were studied in this paper .

常绿阔叶树种不同生活型植物N和P含量存在一定差异，常绿阔叶乔木树种N和P含量高于常绿阔叶灌木树种。

Deciduous broad-leaved species have consistently higher leaf N and P than evergreen broad-leaved species , but there are no significant differences in stems , branches and roots .

在该模型中，CA状态跃迁规则与坡度、风速、风向、湿度和树种紧密相关。

In the model , CA transition rules were modified in accordance with the slope , wind speed and direction , humidity and tree species .

中国暖温带落叶阔叶林中某些树种的~（13）C自然丰度：δ~（13）C值及其生态学意义

~ ( 13 ) C at Natural Abundance Levels in the Broad-leaved Deciduous Forest in the Warm-temperate Region of China : Their δ ~ ( 13 ) C Values and Ecological Significance

3个树种叶凋落物分解过程中N、P、K和C的释放率及其动态变化也存在一定差异。

The release rates and dynamic changes of nutrient elements ( N , P , K and C ) in leaf litters exist some differences among three tree species during decomposition process .

油茶（CamelliaoleiferaAbel）是中国原产且最为重要的木本食用油料树种。

Tea-oil tree ( Camellia oleifera Abel ), one of most important ligneous edible trees , is originated in China .

一般来说，温度高、光照强时，以上树种与大气间COS的交换强；空气中COS初始浓度高时，植物对COS的吸收通量高。

The exchanging fluxes were high when air temperature and ambient concentration of COS were high as well as light was strong .

3个树种的AQY、Rd和LCP对土壤水分具有明显的阈值响应。

AQY 、 Rd and LCP of the 3 tree species had clear threshold value responses to soil water .

辐射面积达5.59万hm2。并提出干鲜小水果是集经济效益与生态效益于一体的优良树种。

Extensive scope was up to 55.9 thousand hm ~ 2.As the result , dry or fresh fruitlet has the economic and ecological benefits .

土壤C/N、环境主要温室气体（CO2，CH4与N2O）浓度、树种和火状况对CH4氧化有显著影响。

CH4 oxidation was also particularly sensitive to soil C / N , Ambient CO2 , CH4 and N2O concentrations , tree species and forest fire .

表明油松忍受弱光的能力明显高于其它树种，在弱光下仍具有较高的Pn。

It can be seen that the capacity of Pinus tabulaeformis tolerate low light are better than the other species , it has a higher Pn in low light .

普通油茶（CamelliaoleiferaAbel）是我国南方主要的木本食用油料树种，对我国生态经济林的发展有着不可取代的作用。

Camellia oleifera Abel is the South China edible oil major woody species , the development of ecological economic forest has an irreplaceable role .

栓皮栎（QuercusVariabilis）在中条山广泛分布，是我国重要的用材树种，为重要的工业原料。

Quercus variabilis is widely distributed in the mountain section , is an important timber species and an important industrial raw materials .

四倍体刺槐Robiniapseudoacacia是我国引种驯化历史较久的外来树种，为人工诱交植株，分速生型和饲料型。

Robinia pseudoacacia , a domesticated exotic species with a long history , is an artificially induced variation divided into fast growing and fodder types .

桉树（Eucalypt）作为南方速生丰产林的战略树种，其不同无性系品种之间的木材特性差异大。

As strategic tree species of souther fast-growing and high-yield forest , eucalyptus timbers have much more differences in wood properties between clones .

白桦（BetuLapLatyphyLLa）为我国东北与内蒙古地区的先锋树种，广泛用于建筑、家俱和造纸业。

Betula platyphylla , a kind of pioneer tree species in Northeast and Inner Mongolia of China , is widely used in construction , furniture , and paper production .

西伯利亚红松（Pinussibirica）是欧亚大陆寒温带针叶林（泰加林）的著名成林树种，与红松（P.koraiensis）近缘，为材果兼优大乔木。

Pinus sibirica is a well-known forest species of Eurasian boreal coniferous forest ( taiga ), which is excellent both for fruit and material , and relative to Pinus koraiensis .