Abstract:

To discuss the regeneration characteristic and size structure of seedlings in different slopes, natural regeneration of Pinus tabulaeformis f. shekannesis in the pure forest in Ziwuling on loess plateau was studied by means of sample plots. The results indicated that the natural regeneration of P. tabulaeformis f. shekannesis seedlings was closely related to the slope positions. The P. tabulaeformis f. shekannesis seedlings in the up-slope and mid-slope were similar in number and density, while in the low-slope the number and density were much lower. The height of P. tabulaeformis f. shekannesis seedlings in different slopes varied little and was consistent with the average height. In conclusion, the author suggested that during the protection and recovering of the P. tabulaeformis f. shekannesis forest, different cultural measures should be taken in different slopes.