selection of tree

Entropy and natural selection pressure and their applications to population genetics of forest tree

熵和自然选择压及其在林木群体遗传学中的应用

Selection and Breeding of Male Alee tree New Varieties of Populus tomentosa in Beijing

北京地区毛白杨雄株行道树新品种选育

Starting from sustainable development of city, this paper analyzes structuring framework of modern ecological city. According to demand of ecological city construction, this paper makes a discussion on vegetation, air change, selection of tree species, etc.

以城市可持续发展为出发点，分析了现代生态城市的构建框架，按生态城市的建设要求，从城市的植被、空气变化、树种选择等方面进行了探讨。

Tree Species Selection of Optimization Pattern of Sand Control Forest and Their Arrangement

防风固沙林优化模式的树种选择及其配置

Developing tree species in local area, strengthening selec-tion and breeding, especially introduction and tameness of color-leave plants to stress city gardens' features of Beijing are the important tasks on selection and development of city greening tree species in Beijing at present.

认为发展乡土树种，加强选种、育种工作，积极开展彩叶植物引种驯化，突出北京城市园林特色，是当前北京城市园林绿化树种选择和发展所面临的重要课题。

The scientific selection criterion of tree species, selection process and method are put forward;

提出了近自然水源涵养林树种选择标准、选择过程和选择方法；

Study on the Selection Inquiring System of Afforesting Tree Species in Daqing City

大庆市绿化树种选择查询系统的研究

The result was: Cavity entrance vertical diameter, Basic areas of 5-radius circle of tree species and slope of nests species was importanted nest-site selection.

结果表明，斑啄木鸟巢位选择的主要因子是5m范围内树的基面积、巢树位置坡度和洞口纵径。

Selection of tree species composition in Shenyang's urban forest communities

沈阳城市森林群落的树种组合选择

Study on the Selection of 69 Asexual Tung Tree Families by Canonical Correlation Analysis

油桐69个无性系的典范相关分析与选优研究

A Decision Tree Based Approach for Construction of Speech Database and Unit Selection

一种基于决策树模型的音库构建和基元选取方法

Experiment on Selection of Tree Species for Afforestation on Slopes Facing the Sea in Daishan County

岱山县临海一面坡造林树种对比试验