额济纳胡杨克隆格局与克隆生长构型研究

In this paper we studied the different age structures populus euphratica and correlation analysis on the ground water level, sludge thickness and clonal traits of populus euphratica, it's includes pattern of clonal population, clone ramets number, branching angle of clonal ramets and height of clone ramets. The result showed: Populus euphratica age have a significant relation with clonal traits including cloning growth pattern, clone ramets number, height of clone ramets and spacer length between clonal ramets. The ground water level has a significant relation with clonal traits including cloning growth pattern, clone ramets number and spacer length between clonal ramets. The sludge thickness has a significant relation with clonal traits including pattern of clonal population and spacer length between clonal ramets. The correlation between clonal traits and populus euphratica age indicates populus euphratica age have a have decisive effect on population regeneration, determines the population density, plant height and population distribution pattern in the clonal regeneration. Ground water and sludge layer were the environmental factors of inducing different cloning growth architecture. The research above showed in middle age stand when the ground water depth was 2 meter and sludge thickness was 30-40 cm, the pattern of clonal population was uniform pattern. The highest seedling was 3-5 meter, population density was 4 plants in a square meter, thus beneficial to stable of populus euphratica clonal population.