拉孜县藏川杨古树树龄与胸围回归模型研究  

Research on Regression Model of Tree Age and Breast Circumference of Ancient Populus Szechuanica in Lhatse

作　　者：袁寒嫣 潘刚 YUAN Hanyan;PAN Gang(Research Institute of Tibet Plateau Ecology,Tibet Agriculture&Animal Husbandry University;Key Laboratory of Forest Ecology of Tibet plateau,Ministry of Education;United Key Laboratories of Ecological Security,Tibet Autonomous Region;National Key Station of Field Scientific Observation&Experiment of Alpine Forest Ecology System in Nyingchi Tibet,Nyingchi Tibet,860000,China)

机构地区：[1]西藏农牧学院高原生态研究所 [2]西藏高原森林生态教育部重点实验室 [3]西藏生态安全联合重点实验室 [4]西藏林芝高山森林生态系统国家野外科学观测研究站,西藏林芝860000

出　　处：《高原农业》2022年第4期317-323,共7页Journal of Plateau Agriculture

基　　金：西藏生态安全联合重点实验室开放基金项目(STAQ-2021Y-5);社会服务项目(日喀则拉孜县古树名木调查)。

摘　　要：拉孜县藏川杨古树树龄与胸围回归模型研究对于完善西藏藏川杨古树树龄的模型建立及预测具有重要的意义和参考价值。研究区内分布的藏川杨古树共有920株。对研究区100株藏川杨古树的样本建立树龄与胸围的回归模型,得到回归方程为:y=259.54ln(x)-1333(R^(2)=0.8018,P<0.01),x为胸围、y为树龄。通过分层比例抽样法检验得出此方程对于该区域胸围大于250 cm的藏川杨古树的估龄更为准确,为往后通过胸围推算藏川杨古树树龄的研究提供一种切实可行的方法。The regression model research on the tree age and breast circumference of ancient Populus Szechuanica in Lhatse was of great significance and reference value for the establishment of the model and prediction of the tree age of ancient P. Szechuanica in Tibet. A total of 920 ancient P. Szechuanica were distributed in the study area. A regression model between tree age and breast circumference was established for 100 samples of ancient P. Szechuanica in the study area and the regression equation was obtained as y=259.54ln(x)-1333(R^(2)=0.8018,P<0.01), in which x was breast circumference and y was tree age. This equation was found to be more accurate for estimating the age of ancient P. Szechuanica with breast circumference greater than 250cm by stratified proportional sampling method, which provided a practical method for estimating the age of ancient P. Szechuanica with breast circumference in the future.

关 键 词：藏川杨 树龄 胸围 回归模型 

分 类 号：S812-05[农业科学—草业科学]