Abstract:

Through biochemical tests of bamboo leaves, surveys of undergrowths and arthropod communities in Phyllostachys heterocycla cv. Pubescens forests managed with 5 different measures including cultivating and fertilization, cultivating, weeding, spraying herbicide and non-management in Sanming, Fujian Province from 2001 to 2002, the relationships among undergrowths, contents of chemical subtances in bamboo leaves and the arthropod community were studied. The results showed that 1) the effects of management measures on the monthly contents and their time dynamic of the chemical substances in bamboo leaves were significant and complex greatly; 2) the chemical substances of protein, water_soluble, tannin and flavonoid in bamboo leaves could all promote or restrain the numbers of the dominant pest populations in the canopy of bamboo forest, and so the structure of the arthropod community was affected significantly, which appeared to the promotion of the contents of flavonoid and tannin to the arthropod evenness in the canopy of forest; 3) the relationships between the undergrowths and the arthropod community appeared to the promotion of the plant species diversity in the shrub to the arthropod species diversity in the canopy and underlayer of forest, and the promotion of the plant species diversity in the liana to the arthropod evenness in the underlayer of forest; 4) changes of the undergrowths and the chemical substances' contents in the leaves due to the management measures could lead to significant changes of the arthropod community, thus, scientific management and protection of undergrowths would be regarded in the IPM of bamboo forest.

Key words: Phyllostachys heterocycla cv. Pubescens, arthropod community, undergrowths, chemical substance in bamboo leaves, management measure