Structure and growth regulation of Bothriochloa ischaemum clone modules

Large samples of Bothriochloa ischaemum clones were collected from the mountain grassland in Tekesi County of Yili River Valley to quantitatively analyze the structure and growth patterns of their modules, by randomly digging up whole ramet tuft. The results showed that the average tuft size of clones during its growth stopping period was 13.5 cm, the individuals of reproductive and vegetative tillers occupied 27.9% and 72.1% of total respectively, and at the same time, the biomass of reproductive and vegetative tillers occupied 50.6%and 49.4% of total, respectively. With the increasing of tuft size, number and biomass of different tillers, number of total tillers and biomass of tillers of B. ischaemum clones were in exponential allometry growth, number and biomass of vegetative tillers were in a positively power functional relationshiped with the number and biomass of total tillers, and number and biomass of reproductive tillers were positively correlated with either number or biomass of total tillers.