The spatial distributing pattern of aboveground biomass of Elymus sibiricus population
老芒麦(Elymus sibiricus)种群地上生物量空间分布格局研究

By use of methods of fractal geometry,the spatial distributing pattern of aboveground biomass of Elymus sibiricus population was studied of fifteen investigation dates in the growing season.The results show that,(1) On all the fifteen investigations,individuals of Elymus sibiricus population were similar to each anorhes in a spatial distributing pattern of aboveground biomass.The maximum of fractal dimension was 1 5054 on 6 July.The minimums of fractal dimension are 0.7001,0.4675 and 0.3428 in 16 June,31 July and 10 August.(2) During the whole growing season,there was a linear relationship between Log value of aboveground biomass and plant height,but there were still a lot of problems in detail.(3) In a scale range from 20cm to 59cm,there were 2 linear areas in the semivariogram of Elymus sibiricus. The result shows that the spatial distributing pattern of aboveground biomass was heterogeneity.(4) The value of fractal dimension was 1.63465 when height interval was <4cm.The value of fractal dimension was 1.0407 when height interval was >4cm.