selection of cocoon for egg production是什么意思

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用法例句

Comparative analysis on tree species selection for greening and greenery arrangement in the isolated grassland between the fast lanes and slow lanes;

快慢车道隔离带绿化树种选择和布局比较分析

Study on tree species selection and planting technology ofsand break and road protection forest belt along Bao zhong railroad;

宝中铁路防沙护路林带树种选择及营造技术研究

The paper introduces the basic situation of implementing the project of forest rehabilitation from slope agriculture in Lijiang and details of tree species selection for the forestation in the project,and evaluates the corresponding afforestation effect.

介绍了丽江市退耕还林工程实施的基本情况和树种选择的详细情况,分析了工程所选择树种的结构及分布,对所选树种的造林成效进行了评价,分析指出了存在的问题,提出了丽江市退耕还林工程树种选择的相关建议,推荐了一些适合在丽江退耕还林工程中选用的树种。

Analyses on species selection and community collocation of macrophyte in lake restoration;

湖泊水生植被恢复物种选择及群落配置分析

Utilization of species selection and optimum quantity on stocking in northern area of South China Sea

南海北部放流物种选择和主要种类最适放流数量估算

Novel genetic algorithm based on species selection for solving constrained non-linear programming problems

基于物种选择的遗传算法求解约束非线性规划问题

Based upon introduction of land use scope and conditions in greening of city rivers the principles for tree selection is mentioned.

在介绍了城市河流绿化特点、绿化用地范围及条件的基础上,阐述了树种选择的基本原则,并对城市河流绿化设计的原则、要点及其对水体、水体边缘、库边、滨河路等的设计进行了论述,最终达到生态、环境、经济的综合效益。

The text took the 19 tree species as example and evaluate the ecological characters of tree species, and studied the arrangement mode of tree species, combining structure theory of ecological community with the ecological characters of tree species, then analyzed tree selection, the intraspecific and interspecific relationship, the tree arrangement mode in courtyard greenland, th.

本研究应用LI-6200 光合仪对乌鲁木齐具代表性的19 种园林树木光合、水分生理生态指标进行测定,以19 种树木为例对树种生态习性进行评价,基于树种的生态习性,结合生态群落结构理论研究树种配置结构模式,对庭院树种配置中树种选择、种内、种间关系及配置结构模式进行分析和探讨,以期为庭院绿化建设提供科学依据。

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

Selection on Suitable Trees in Semiarid Loess Hilly and Gully Area;

半干旱黄土丘陵沟壑区适生树种选择

The Study of Tree Species Selection for the Fast Growing Industrial Material Forestry in South West Zhejiang;

浙西南速生工业原料林树种选择研究

Tree Selection and Planting Technology Coping with Coastal Saline Soil

滨海盐渍土绿化树种选择和栽植技术

THE ADAPTIVE CHARACTER AND SPECIES CHOICE OF MAIN PLANTING TREES OF FARMLAND SHELTERBELT IN THE PEARL RIVER DELTA

珠江三角洲农田防护林主要造林树种的适生特性与树种选择研究

The Tree Species Selection and its Effect Evaluation to Urban Forest in Baotou City

包头市城市森林绿地树种选择及效果评价

Technique on Selection Main Species and Forestation in East of Qinghai

青海东部地区主要树种选择及造林技术

Suitability Evaluation and Selection of Urban Landscaping Tree Species in Wuwei;

武威市城市园林绿化树种选择及适宜性评价

Study on the Structure of Phyllostachys Heterocycla Mixed Forest and Selection of Associated Tree Species for Phyllostachys Heterocycla;

毛竹混交林结构及其伴生树种选择研究

Species Selection and Hydrologic Function of Plantation in Nenjiang Sandy District;

嫩江沙地树种选择及人工林水文功能的研究

Ecological Landscape Forest Tree Species Selection and Configuration Quantitative Study;

生态景观林树种选择与结构配置定量研究

Study on the Trees Species Selection and Configurating Model for Soil and Water Conservation Forest in Hunan Province;

湖南省水土保持林树种选择及配置模式研究

Sketch on Arrangement of Converting the Land for Forestry and Tree Species Selection;

略谈吕梁地区退耕还林布局及树种选择

Tree Species Selection for Forests Form Transformation of the Deteriorated Pinus massoniana Forests in Red Soil Low Hilly Area

红壤低丘低效马尾松林林相改造树种选择研究

Approaching the Sea Coastal Protective Forest System Construction and Tree Species Selection in Xiamen City

厦门海防林体系建设与树种选择的探讨

Study on Tree Species Selection and Afforestation Models of Coastal Protection Forest in Beilun District of Ningbo

北仑区沿海防护林树种选择与造林模式研究

Experimental Study on Selection of New and Fine Tree Species in Excellent Green Space

精品绿地中新优树种的选择实验研究

Selection and Application of Ornamen-tal Evergreen Broadleaf Trees and Shrubs in Shandong Region

山东园林中常绿阔叶树种的选择和应用