Structure regulation and control on underground bamboo rhizome system of bamboo forest for shoot and wood

Structure regulation and control on underground bamboo rhizome system of bamboo forest for shoot and wood were conducted for eight years.The results indicate that under the condition that winter shoot,spring shoot and bamboo wood output of Phyllostachys pubessens were equal to that of the control,in the test sample plot,the bamboo shoots output could reach 2 527 kg·hm-2,the average diameter of rhizome increased 0.32 cm,the regulation and control on underground bamboo rhizome system for years did not led a decrease of rhizome diameter,although ramose rhizome was smaller 0.1 cm than taproot;the stick length of rhizome increased 0.31 cm,the ramose rhizome derived from taproot increased averagely 2 pieces,the total length and amount of rhizome were increased severally 545.0 cm and 4.3 pieces;while the rates of them within 15 cm depth of soil were 18% and 10%,compared with contrast.