Abstract：Vegetation biomass changes and breeding technologies of black-bone chicken(Gallus domesticus) under Phyllostaehys pubesens forest in Chishui River Basin located at Guizhou Province were studied by using field sample plots survey combined with enterprises/cooperative investigation.The results showed that:(1) Undergrowth biomass of mother forests,high-yield forest,low-yield forest and community forest of Ph.Pubesens was respectively 68.35 t/hm2,67.90 t/hm2,20.81t/hm2 and 56.18 t/hm2,accounting for 45.39%,37.26%,10.84% and 45.39%,respectively,of aboveground vegetation biomass,while the biomass of shrub,herb and ground litters took up 57.21-74.68%,4.28-10.24% and 19.83-32.54%,respectively.The indicators for undergrowth biomass composition,stand structure and plant diversity were found in significant difference between different types of Ph.Pubesens forest;(2) Undergrowth biomass,comprehensively affected by the vegetation-soil system of Ph.Pubesens forest,is significantly correlated with some indexes of surface soil physics and chemistry,stand structure and plant diversity.The increase of undergrowth biomass could increase soil fertility of Ph.Pubesens forest,while breeding black-bone chicken under bamboo forest may increase the surface soil disturbance,reduce biodiversity and lead to decline soil fertility in addition to reducing undergrowth biomass;(3) Net output of forest land increased multiply if black-bone chicken are bred at a suitable pattern for 750-1500 chickens/hm2 and 1-2 times/a year.
