关键词: 林地“一张图”, 生长模型, 因子更新, 优化算法, 模型链接

Abstract:

Single map of forestry land resources is important for forest resources management.Application of stand growth model in updating stand factors of forest resources is meaningful in forest management practices.24 growth models were established based on data set of 4th forest resources survey in Kunming,which illustrate dynamic growth process of average stand height,DBH,number of trees per hectare,volume per hectare and mean increment of volume by model link.Fitting goodness of height growth is between 0.21 and 0.64.Fitting goodness of DBH growth is between 0.37 and 0.78.Fitting goodness of volume growth per hectare is between 0.44 and 0.92.There is a difference of 0.37 million cubic meters between predictions through stand growth model and observations.There is a difference of 2.91 million cubic meters between predictions through volume growth rate in Yunnan province and observations.24 models for different tree species could meet the requirement of data updating for single map of forestry land,which could provide support for policy making in forest management by mastering fluctuation of forest resources.

Key words: forestry land resources on single map, growth model, data updating, optimal algorithm, model linkage