Abstract:Abstracts:In order to master the regression relationship of Phyllostachys heterocycla cv. Pubescens between DBH(diameter at breast height) and quality, and make its management easy, and serve its industry in Xianning City, we investigated the bamboo of the main producing areas in Xianning City. We estimated its quality of each diameter class of Phyllostachys heterocycla cv. Pubescens in harvested area and adopted the method of mathematical regression analysis, and then ultimately established the regression relationship between bamboo DBH and quality in Xianning City.