摘要
生态场理论是物理生态学的基本理论，它基于植物分布格局、植物生长模型、植物竞争以及资源利用的研究。研究森林草原过渡带上沙地云杉种群在更新中产生的生态场的特性，结果表明：沙地云杉种群生态场是半椭圆形特殊的非均匀场；生态场强度随着与母树距离的增大而变化，开始时迅速增大，３～５ｍ处场强达到最大，然后逐渐下降；由于生态场的重叠而使叠加部分的场强明显增大；生态场的作用范围与坡度、坡长等地形因子及树高、冠半径等测树因子都有密切的关系。长轴半径（Ｒ）与坡度（Ｘ）、坡长（Ｌ）和树高（Ｈ）存在下列多元线性关系：Ｒ＝０．９２３Ｈ＋０．３１６Ｘ＋０．０１５Ｌ－４．３１４（ｒ＝０．８２５）
Ecological field theory is a
basic theory of physical ecology.Its basis is the research on the plant distribution pattern,plant
growth model,plant competition and resources utilization.The ecological field of Picea
mongolica population is a semi oval,no even field.It is a complex process which is
determined by the particularity of its habitat and its biological characters.The intensity of
ecological field changes with the increase of distance from the mother tree.It increases rapidly
in the distance of 3～5meters,and then decrease gradually.The intensity of the ecological field
in the part of overlap increases obviously.Domain of the ecological field has relationships with
the following factors:degree of slope,length of slope,height of tree and ridus of tree crown.The
function of ridus of ecological field long axis( R ),degree of slope (X ),length of slope( L )and
height of tree (H) is: R=0.923H+0.316X+0.015L-4.314\ (r=0.825)
出处
《生态学报》
CAS
CSCD
北大核心
1999年第1期50-54,共5页
Acta Ecologica Sinica
基金
国家自然科学基金
中国科学院"百人计划"支持项目
