摘要
应用分形几何的原理和方法,研究了不同初始密度下假俭草的生长格局。结果表明,假俭草具有自相似的生长过程。不同的初始密度下,假俭草具有不同的分形维数和相应的生物量积累规律。生物量积累速率随着分形维数的增大而增大。观测期4个处理的静态分形维数最大值分别为:1.5311(密度1株/m2);1.4425(密度5株/m2);1.4078(密度10株/m2);1.3732(密度20株/m2)。4个处理的动态分形维数分别为:1.4326(密度1株/m2);1.3952(密度5株/m2);1.3547(密度10株/m2);1.2987(密度20株/m2)。分形维数同时反映了假俭草的分枝能力和对空间的占据能力。假俭草种群具有依据外界条件而调节生长格局的生态适应策略。
By using the principles and methods of fractal geometry theory, the growth pattern of Eremochloa ophiuroides was studied with the different initializing density. The results show that Eremochloa ophiuroides has a self-similarity growth process. It has different fractal dimension and disciplinarian of biomass accumulation with different initializing density. The velocity of biomass accumulation increases with the increasing of fractal dimension value. The static state fractal dimension of four treatment in survey period is 1.5311 (1 individual plant/m^2), 1.4425 (5 individual plant/m^2), 1.4078 (10 individual plant/m^2), 1.3732 (20 individual plant/m^2). The dynamic state fractal dimension of four treatment is 1.4326 (1 individual plant/m^2), 1.3952 (5 individual plant/m^2), 1.3547 (10 individual plant/m^2), 1.2987 (20 individual plant/m^2). And the ability of divarication and inhabiting space of Eremochloa ophiuroides is showed by fractal dimension. So the clonal population of Eremochloa ophiuroides can adjust growth pattern according to the environment. This is a kind of adaptable ecological policy.
出处
《四川农业大学学报》
CSCD
2005年第2期214-217,共4页
Journal of Sichuan Agricultural University
关键词
密度
假俭草
生长格局
分形维数
density
Eremochloa ophiuroides
growth pattern
fractacl dimension
