Abstract:

The main types of management artificial disturbance to monoculture bamboo( Phyllostachys pubescens ) forests could be divided into cultivating land+fertilization(C+F), cultivating land?, leveling off hilltops(L), spraying herbicide +leveling off hilltops(S+L) and non management(CK) in recent years. By means of spot check of undergrowth and canopy mites on bamboo in different forests disturbed with different types of managements disturbance in Sanming, Fujian Province from Sep. 2001 to Aug. 2002 , the results indicated that (1) there were 84 species of plant that belonged to 36 families in shrub layer, and 28 species of plant that belonged to 15 families in liana layer, and 30 species of plant that belonged to 26 families in herb layer under the monoculture bamboo forests in Sanming, Fujian Province. The sequence of species diversity of different layers in undergrowth was shrub layer >liana layer>herb layer. (2) All types of disturbance reduced the species diversity and evenness in shrub layer, and increased the richness, species diversity and evenness in herb layer. But the effects on liana layer were complicated. (3) There were 15 species in canopy mites group in bamboo forests which included 9 species of harmful mites and 6 species of predatory mites. In comparison with CK, C+F could increase the diversity of the canopy mites group, C+F and L could all increase the evenness of the group and decline its dominant concentration. (4) The correlation between the undergrowth diversity and canopy mites diversity was not significant. But the plant diversity in liana layer made significantly against the increase of the population of Oligonychus urama , and the plant diversity in herb layer was in favor of the increase of the population of Typhlodrinus bambusa .

Key words: Phyllostachys pubescens, Undergrowth, Management disturbance, Canopy mites group