论文部分内容阅读
在对祁连山西营可及哈溪两个试验区不同类型青海云杉林抚育前后林分部分生长因子和蓄积量变化规律的研究中，以５种单因变量回归曲线对抚育前后两类型青海云杉林的单株胸径定期平均生长量、单株材积定期平均生长量以及林分蓄积量按径阶变化的规律分别进行模拟，以相关系数和离散系数两参数结合进行选优，最后选定一种模拟效果最佳的模型为最后模型。
In the study of the variation of some growth factors and accumulation of different types of Picea crassifolia forestry before and after tending in both West Camp and Haxi of Qilian Mountains, five kinds of single-factor regression curves were used to study the changes of Qinghai cloud Cunninghamia lanceolata, the average annual growth rate of single-breed DBH, single volume per plant average growth and volume of forest volume changes according to the order of the law were simulated, with the correlation coefficient and the discrete coefficient of the two parameters combined with the selection, the final selection of a The best model for the simulation is the final model.