Testing and Comparing the Impact of Chinese Fir Provenances on Basal Area Growth Models

Twomethods for testing the impact of Chinese fir provenances planted on the same region on their basal area growthmodels,randomeffects test and fixed effects test,were compared with the data fromthree forest farms,Jigongshan,Dagangshan and Hongya.The result showed that randomeffects test was better while fixed effects test tended to refuse wrong the null hypothesis of no significant difference in parameters of basal areamodels among Chinese fir provenances.Meanwhile,the result showed by randomeffects test demonstrated that basal areamodels of provenances planted on the same region was of no significant difference.