Abstract:Aiming to provide a theoretical basis for the manager of Sejila Mountain, we studied the natural Abies georgei var. smithii forest from different slope directions. The pH, 7 nutrients content, and fertility status in different slope directions from 0 to 100 cm soil were measured by one-way variance, stoichiometric ratio and, Nemero index. The results showed that (1) the soil pH of the Abies georgei var. smithii forest was less than 7. Except the soil total potassium content, the mean values of other nutrient contents and coefficient of variation of 0-100 cm soil layer were all expressed as sunny slopes < Shady slope. All were moderate variation. Except for the lower content of total phosphorus and total potassium, other indicators were at medium level and above. (2) The soil organic matter, total nitrogen, and available nitrogen decreased with the increase of soil layer, and the difference between surface layer and deep layer was significant (P<0.05). There was not consistent variation in other nutrients with the deepening of soil layer, and the difference between the soil layers was not significant (P>0.05). (3) The soil stoichiometric ratios of the sunny slopes generally decreased as the soil depth increased, while the shady slopes fluctuated. Except C:N, C:P, C:K, N:P, N:K, P:K in the sunny slopes were less than those in the shady slope. (4) The soil fertility index of the shady slope (1.44) was higher than that of the sunny slope (1.32). The slope direction had certain differences in the physical and chemical properties of the soil by affecting various factors. The soil nutrient content and fertility status of the shady slope were better than those of the sunny slope. The total potassium was the first limiting factor, and the total phosphorus was the second limiting factor.