[Effects of Fargesia denudata on density of its biomass distribution pattern]

In this paper, the effects of Fargesia denudata density on its biomass distribution pattern were studied in the primitive Fargesia denudata-Picea purpurea forest from May to October, 2003. The results showed that with increasing stem density, the total biomass, above-and below-ground biomass, net production, and average stem biomass of the bamboo were all increased, while the net increment of aboveground biomass decreased. The relationship between above-and below-ground biomass in the bamboo communities was also regulated by the stem density, with the correlation coefficient increased with the density. Except for the exponential period (July and August), the ratio of above-/below-ground biomass increased with the density, and the moderate density (140 +/-7 stems x m(-2)) had the highest ratios of above-/below-ground biomass. The biomass distribution pattern of different organs depended on both stem density and growth period, and stem density played a significantly important role in the distribution pattern of bamboo biomass.