CAJ | 학술논문

利用种群密度效应模型N=exp(aln~2S+blnS+c)对南方铁杉种群密度变化过程进行拟合,其中N为单位面积株数;S为林分单株平均胸高断面积;a、b、c为待定参数,模型拟合结果为N=exp(4. 385 15ln~2S+11. 941 98lnS+10. 738 76),相关系数r=0. 889 5,拟合效果较好;同时,对伴生树种的种群密度进行拟合,发现伴生树种的相关系数r=0. 553 2,拟合效果不佳.模型模拟结果表明,南方铁杉种群密度变化机制既受其自疏作用的影响,也受其伴生树种他疏作用的制约,但自疏是影响南方铁杉种群密度减少的主要原因.模型较好地描述了南方铁杉种群密度效应规律,可应用于指导其密度调节与控制.
이용충군밀도효응모형N=exp(aln~2S+blnS+c)대남방철삼충군밀도변화과정진행의합,기중N위단위면적주수;S위림분단주평균흉고단면적;a、b、c위대정삼수,모형의합결과위N=exp(4. 385 15ln~2S+11. 941 98lnS+10. 738 76),상관계수r=0. 889 5,의합효과교호;동시,대반생수충적충군밀도진행의합,발현반생수충적상관계수r=0. 553 2,의합효과불가.모형모의결과표명,남방철삼충군밀도변화궤제기수기자소작용적영향,야수기반생수충타소작용적제약,단자소시영향남방철삼충군밀도감소적주요원인.모형교호지묘술료남방철삼충군밀도효응규률,가응용우지도기밀도조절여공제.
The density effect of Tsuga tchekiangensis population was analyzed by the theoretical model describing the whole density change process of plant population, i.e., N=exp(aln~2S+blnS+c) where N and S represent population density and mean basal area of at breast height respectively, and a, b, c are parameters. The result of which was described as N=exp(4. 385 15ln~2S+11. 941 98lnS+10. 738 76) r=0. 889 5. At the same time, there is a poor correlation r=0. 553 2, by simulating the population density of species associated species. Model simulation results showed that the population density of T.tchekiangensis not only influenced by self-thinning effects, but also by associated tree species. The impact of self-thinning was primarily due to decreasing of T.tchekiangensis population density. The simulated results showed that the model fitted well observed data from T.tchekiangensis population. Therefore it is very useful in practice, which will provide a scientific basis for density management of T.tchekiangensis population.