并且竹笋的死亡率是非密度制约的。
还有密度制约的生物因素，诸如病害、捕食和种内竞争等。
There are as well as density-dependent biological factors such as disease, predation, and intraspecific competition .
如果出生率和死亡率不随密度的变化而变换，则是非密度制约的。
Birth and death rates that do not change with density are density independent.
如果种群参数如出生率和死亡率随种群密度的变化而变换，就可以说是密度制约的。
Population parameters such as birth and death rates which vary with density are said to be density dependent.
人工种群植株不同密度间个体生长差异显著，尤其是人工二年生种群植株中、低密度区比高密度区个体生长得较大，体现了密度制约的效应。
Plants, especially in population of two years, have bigger bodies in low and middle densities than that in high densities in field. It's the effect of density dependence.
在调节种群增长方面，它与捕食一起是最重要的密度制约因子。
Together with predation, it is the most important density-dependent factor in regulating population growth.
传统的支护方式使工作面支护密度强度下降，回收工作强度增加，制约了安全生产。
The traditional method make work density strength descended, recovering the work strength increase, making to invite the safety produce.
但是，无机非金属矿物填料的密度均高于炭黑、白炭黑等补强材料的密度，这严重制约着无机矿物材料在橡胶中的使用。
But, the densities of the inorganic minerals are higher than reinforce materials-carbon black, which heavy restricts the use of inorganic mineral materials in the rubber.
而氧化膜的生长和性能要受到槽液温度、持续氧化时间、合金成分、电流密度、硫酸浓度等多种因素的制约。
The growth and property of oxidized film are restricted by various factors such as tank liquor temperature, sustained oxidation time, alloy composition, current density and sulphuric acid density.
没有必要认为密度制约因素具有任何特殊的重要性。
There is no need to regard density-dependent factors as having any special importance.
多孔铝膜的膜参数(孔径、孔密度、孔的纵横比和膜厚)和孔排布的规律性受到诸多因素的影响和制约。
The parameters of porous Alumina membrane, such as aperture, hole density and aspect ratio, membrane thickness, had been effected by many factors mentioned above.
但是，现在显得很清楚的是，所有种群都受“种群密度相关”和“种群密度无关”两类因素在不同程度上的共同制约。
But it now seems clear that all populations are regulated by a mixture of density-dependent and density-independent effects in varying proportions.
建筑物高度和密度的管理限制制约了房屋供应，导致价格上涨。
Regulatory limits on the height and density of buildings constrain supply and inflate prices.
株高度和生物量及其分配无严格的密度制约规律。
There was no strict rule of density dependence on ramet height, biomass and its allocation.
捕食天敌能防治病害的前提是害虫猎物数量增长受害虫自身密度的制约。
The prerequisite for the natural enemies to be able to control insect pest is that the increase of injurious insects is restrained by the density of the latter.
另外，群落谱系结构研究还有助于探讨中性理论、密度制约假说等生态学 理论， 并预测干扰作用下的群落演化趋势。
Phylogenetic information also indicates the influence of environmental factors and studying community phylogeny at the metacommunity level helps to understand regional ecological processes.
另外，群落谱系结构研究还有助于探讨中性理论、密度制约假说等生态学 理论， 并预测干扰作用下的群落演化趋势。
Phylogenetic information also indicates the influence of environmental factors and studying community phylogeny at the metacommunity level helps to understand regional ecological processes.
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