生态密度

结果表明：保护区内现有大熊猫23只，竹林内生态密度为0439只/km2。此外，首次采用了离差平方和聚类的方法，将该种群划分为4个年龄组。

The results showed that there were 23 pandas in the reserve and the ecological density in bamboo forests was 0 439 giant pandas / km 2.The population could be divided into four age groups with the Sum of Square Method .

两年的平均生态密度分别为1.28条/hm2和1.79条/hm2，野生扬子鳄种群数量为145条。

The average ecological densities of the alligators in the two years were 1.3 ind. / ha and 1.8 ind. / ha , with an estimated population of 145 individuals .

中籼新品种黔育417栽培技术研究Ⅰ.不同生态区密度试验

STUDIES ON CULTURAL TECHNIQUE OF NEW INDICA RICE VARIETY QIAN-YU 417 ⅰ . Experiments of Planting Density in Different Ecological Areas

根据各省、直辖市、自治区的生态资产密度，开展了全国的生态资产区划。

The national regional planning is conducted according to the density of ecological assets of various province , municipality and autonomous region .

此算法借鉴生态学中的生态种群密度竞争方程来描述多目标间的复杂关系，可以同时从个体和种群层次指导多目标之间关联程度的调整。

In the algorithm , an ecological population density competition equation is used for reference to describe the relation between multiple objectives and to direct the adjustment over the relation at individual and population levels .

陆地生态系统碳密度格局研究概述

A review on the distribution patterns of carbon density in terrestrial ecosystems

四川西北部亚高山云杉天然林生态系统碳密度、净生产量和碳贮量的初步研究

Preliminary study of carbon density , net production and carbon stock in Natural Spruce Forests of Northwest subalpine sichuan , china

湖南省森林生态系统平均碳密度为215.42t·hm-2。

The carbon density the forest ecosystem averaged 215.42t · hm ~ ( - 2 ), taking Hunan Province as a whole .

三峡库区森林生态系统有机碳密度及碳储量

Organic carbon density and storage of forest ecosystems in Three Gorges Reservoir Area

武昌东湖软体动物的生态分布及种群密度

On ecological distributions and population densities of Mollusca in Lake tung-hu , wuchang

把我镇建成生态化，低密度，有活力，人性化城镇。

Took me into eco-town , low-density , dynamic , user-friendly cities and towns .

影响湿地的主要生态因子为人口密度、鸟种类、鸟数量、水质等级、食物丰富度和1月份平均气温。

The paper also points out that there are six ecological factors including population density , bird species and number , water quality level , richness degree of food and average temperature in January .

不同温光生态因素和种植密度均造成郑单958玉米产量之间的差异。随着播期的推迟，产量呈现下降趋势；随着密度的增加，产量增加。

3 , In different temperature and sunshine ecological factors and planting density , a result on the difference of maize yield of " Zhengdan 958 " . With sowing date postponing , the yield descend .

种群数量变化的回归分析和青海云杉生态寿命与环境因子相关性分析表明，青海云杉种群存活数变化和生态寿命与种群密度有关。

The regression analysis of population number change and the correlativity analysis of ecology age of P.crassifolia with environmental factors showed that the change of survival number of P.crassifolia population was correlative with population density .