Growth characteristics and biomass distribution of Phyllostachys pubescens stands with changes in fertilization time

It was important to study the Phyllostachys pubescens stands with different fertilization periods(Ⅰ:without fertilization,Ⅱ:5 years of fertilization,and Ⅲ:13 years of fertilization)growth characteristics and biomass distribution pattern for maintain the long-term productivity.Growth characteristics and biomass distribution of three Phyllostachys pubescens stands with different fertilization periods were studied by field survey in Yong'an County,Fujian Province.Results showed that biomass was in the order of ⅡⅢⅠ.The mass fraction of bamboo stems decreased with fertilization time,whereas the mass fraction for bamboo branches,leaves,roots,and culm stumps increased.Biomass of the shrub layer was in the orderⅢⅠⅡ.The mass fraction for shrub branches and leaves increased in forestⅢ,was in the order of ⅢⅠⅡ,and the mass fraction for shrub roots decreased in forestⅢ,was in the order of ⅡⅠⅢ.The mass fraction of grass leaves decreased with fertilization time as the mass fraction of grass roots increased.The litter mass increased with fertilization time.Therefore,litter increases could be related to higher productivity with fertilization in bamboo stands;also,since major economic issues with bamboo concerned its culm,the decrease in bamboo culms with fertilization increases over time could reduce economic gains which fertilization sought to increase.