Abstract:

In this paper, based on grey system theory, the general GM(1,1)forecasting model for the growth of Japanese larch in Liaoning Province was set up and it has been proof-tested in model precision. Verified by use of the dates of the Japanese larch with age of 21 and 22, it has been proved that the models was effective in practice. The Model-GM(1，1) on mean DBH comparative diference was 2.4%,3.69%, respectively. The Model-GM(1，1) on mean tree height comparative diference was 3.31%,4.69%,respectively．All of them are 1ess than 5％，which indicates that there are good results for estimation by forecasting.