1.
Results of this study provide a theoretical basis for the oriented cultivation of poplar-birch natural forests.
这为杨桦林的分类定向培育提供了理论的依据。
2.
HABITAT UNDER BIRCH-ASPEN FOREST AND NATURAL RECRUITMENT OF KOREAN PINE
杨桦林下的生境条件与红松天然更新的研究
3.
The Seed Bank in Logging Gaps in Populus davidiana-Betula platyphylla Secondary Forests in Changbai Mountain
长白山杨桦次生林采伐林隙种子库特征
4.
Growth Process and Succession Trend of Polar-Birch Secondary Forests in Changbai Mountain,Northeast China
长白山杨桦次生林生长过程与演替动向分析
5.
Over the years a ragged secondgrowth of aspen and birch and speckled alder, at the far edge of the baseball diamond, has blotted out that view.
棒球场外围伐过的树林，多年以来又长出了参差不齐的白杨、白桦和满身斑点的桤木，挡住了视野。
6.
Development and Design of Resin Impregnation Control System of Poplar(Birch) Veneers
杨(桦)木单板树脂浸渍调控系统的开发设计
7.
Study on Nutrient Use Efficiency in the Mixed Forest with Betula luminifera and Cunninghamia lanceolata
光皮桦杉木混交林养分利用效率研究
8.
Management Techniques of Natural Birch Forests and Its Objective management
天然白桦林经营调控技术及目标管理
9.
He picks a place with plenty of food he likes--the inner bark of aspens, willows, poplars, cottonwoods, or birches.
它所选的筑巢地还应有大量它所喜爱的食物----山杨、柳、白杨、三角叶杨或桦树的内皮。
10.
Study on Gap Characteristics and Stability of Betula Albo-sinensis Forest in Taibai Mountains;
太白山红桦林林隙特征及其稳定性的研究
11.
Study on Water Conservation and Hydrochemical Characteristic of Different Stages of Betula Platyphylla Forest
不同林龄白桦林水源涵养及水化学特征研究
12.
Study on Precipitation Hydro-chemical Characteristic of Different Stages of Betula platyphylla Secondary Forest
不同林龄白桦次生林降雨水化学特征研究
13.
Comparison of Biomass of Betula alnoides Plantations and Natural Secondary Forests in Xishuangbanna
2种西南桦人工林与同地2种天然次生林的林分生物量对比研究
14.
A Feasible Study on the Potherb Base Construction in Huanan Forestry Bureau;
桦南林业局山野菜基地建设可行性研究
15.
Study on Growth Models with Artificial Neural Network for Betula Platyphlla Plantation
白桦人工林生长的人工神经网络模型研究
16.
Geologic features and prospecting direction of Xinglong W-Mo deposit,Huadian,Jilin Province
吉林省桦甸兴隆钨钼矿床地质特征及找矿方向
17.
Seasonal changes of soil respiration in Betula platyphylla forest in Changbai Mountain, China
长白山白桦林地土壤呼吸的季节变化(英文)
18.
An Analysis of the Growth Effect of Young Betula luminifera Plantation under Different Site Conditions
光皮桦人工幼林不同立地条件生长效应分析