混合种群

混合种群在各类叶上的发生比率则依作物种类和生长期、两种蚜虫的发生比率及季节不同而变化。

The within-plant distribution of the mixed population of the two aphids varied with crop species , crop growth stages , relative proportions between the two aphids , and seasons .

基于GIS的稻田蜘蛛混合种群发生分析

Analysis of Status of Spiders Population of Rice Fields of China Based on GIS

采用Iwao的m~-m回归分析和Taylor幂的法则，测定三种松毛虫混合种群幼虫的空间分布型和其单一种群一样呈聚集分布，以个体群的形式存在于林间。

In order to analyse the distribution pattern of the larvae of three kinds caterpillar mixed communty in forest the M ~ & M regression analysing method of Iwao and Taylor 's power law were used in this paper .

枇杷园蜘蛛混合种群空间分布型的动态分析

Dynamics of Spatial Distribution of Mixed Spider Populations in Loquat Orchard

小麦蚜虫混合种群数量动态研究

Investigation on Quantitative Dynamics of the Mixed Wheat Aphis Population

油菜蚜虫混合种群损失当量与复合防治指标的研究

Study on the injury equivalent and compound action threshold of RAPE APHIDS

苜蓿草地地表蜘蛛混合种群动态的模糊聚类分析

Fuzzy Cluster Analysis on Dynamic of Mixed Spider Population in Alfalfa Grassland

该地鼠类混合种群数量季节变动和年度变化明显，五年间鼠类组成发生变化。

The population dynamics and species composition changed obviously with seasons and years .

棉田蜘蛛混合种群空间格局分析及应用

Analysis and application of spatial pattern of mixed Spider Population in cotton field

小麦吸浆虫寄生蜂混合种群发生与数量消长研究

Studies on the Population Occurrence and Dynamics of Parasitic Wasp of Wheat Blossom Midges

在测报和防治中，混合种群的理论抽样数为20～40个样点。

For forecasting and control , the mixed-population theoretical sample number determined was 20-40 sites .

优势种群数量变动是影响混合种群产生波动的主要因素。

The fluctuation of dominant population was a key factor influencing the complex population fluctuation .

混合种群的增温能力高于单一种群；

Capacity of rising temperature caused by mixed populations was higher than that by single populations .

非均匀混合种群中合作进化的动力模型研究

The Study of Dynamical Models about the Evolution of Cooperation in Populations Which Are Not Well-mixed

稻田蜘蛛混合种群的空间分布在水稻的不同发育期存在差异。

The spatial distribution of mixed spider populations in rice fields was different during different development stages of paddy rice .

麦蚜自然种群的空间动态小麦蚜虫混合种群数量动态研究

Spatial Dynamics of Wheat Aphid Population under Natural Conditions . Investigation on Quantitative Dynamics of the Mixed Wheat Aphis Population

蛴螬混合种群于白芍生长后期在田间呈聚集分布。

The spatial distribution pattern of mixed populations of white grubs was aggregated at the late growing stage of Paeonia Lactiflora in the field .

在早稻发育的前期、中期和后期，稻田蜘蛛混合种群的空间分布模式分别是聚集的、随机的和聚集的；

During the prophase , metaphase and anaphase of early rice plant development , the spatial distribution pattern of mixed spider populations was aggregative , random and aggregative respectively .

聚集原因的分析结果表明，平均每株2.1238头幼虫是三种松毛虫混合种群幼虫聚集机制发生变化的临界值，也是生产中值得注意的一个生物学指标。

All indices indicated that the larvae is aggregation distribution as individual community 2.1238 per tree , it the limited number of aggregation mechanism and which is also a biological index in production .

通过对麦蚜混合种群的系统调查，从种群生态学的角度出发，采用累加百分数及建立逻辑斯蒂数学模型等方法对小麦蚜虫的混合种群增长模型进行了分析。

With the cumulative percentage , building logistic model and other methods , and through a systematic investigation , the growth trends of the mixed population of wheat aphis was analyzed from the population biological aspect .

针对此问题提出了一种新的以混合遗传种群多样性为度量原则的自适应遗传算法。

Then to solve this matter a new method called genetic population diversity based adaptive algorithm is produced .

研究结果表明：（1）对于均匀混合的有性种群有平凡稳定点。

We have obtained the following main results : ( 1 ) In the mean-field sexual reproduction population there exists stable steady trivial equilibrium , which means the population would be extinct .

并与随机选择方法进行混合产生初始种群，使解在解空间的分布更广，以提高初始解的质量和多样性，提高求解效率。

The two methods are used to initialize population with random method , which make solutions distribute more widely in solution space , so as to improve the quality and diversification of initial solutions and promote the solving efficiency .

这说明了不同的巨桉与桤木凋落物混合分解对细菌种群数量产生不同的影响。

This result indicated that different proportional mixed Eucalyptus grandis with Alnus formosana had effects on bacterial amount .