【摘要】 根据舒城县境内水竹人工林39块标准地和18808株立竹测定资料,研究不同年龄和不同胸径水竹人工林分合理管理密度。在研究过程中按冠幅计算水竹人工林每亩立竹株数除以按胸径计算每亩株数,所得的转换系数(K),乘以冠幅计算的每亩株数的方法,编制出水竹人工林不同年龄和不同胸径经营密度管理表,用以确定水竹人工林合理留养年龄和留养株数的依据。由于水竹是按重量计价出售,本文又根据水竹样竹的胸径—重量和竹高—胸径—重量间的关系所建立的数学模型,编制水竹人工林地方胸径—重量表和竹高—胸径—重量表,供经营单位按重量估产和按重量控制采伐量以及确定合理留养密度时应用。更多还原

【Abstract】 We calculate the culm numbers and weights per mu the different diameter classes and the different crown diameter for the numbers and weights of D.B. H. of 18808 water bamboo culms in Shucheng. The numbers of crown diameter divided by the numbers of average diameter, which is called the transmutable coeffient factor (K) ,K times the numbers by crown diameter,and may prepare the management density table of the different ages and different diameter classes in the artificial stand of phyllostachys heteroclada. The determined optimal reserved ages and numbers propose the helpfull data.In the course of studying the inter relationship between diameter and weight, among height, diameter and weight of the sample bamboo, we have set up mathematical models and worked out local diameter and weight table, local height,diameter and weight table of the artificial stand of Phyllostachys heteroclada for the estimation of yield and the determination of cutting by weights in management unit.更多还原