The near-natural management experiments were carried out at three forestry stations of Culaishan, Taishan and Mingguangsi, with long-time thinning possesses of 2, 10 and 3 years, respectively. The results revealed that: (1) The effects of thinning management could promote the seedling growth compared to the controlled treatment (CK), the main height, diameter at breast height (DBH) and canopy diameter increased by 3.13%-12.89%, 3.03%-8.91% and 2.75%-25.91%, respectively. Similarly, the annual mean diameter of residual trees height, DBH and diameter of canopy also improved by 21.43%-66.67%, 9.21%-26.15% and 64.29%-300% when suffered to near-natural processing. (2) The intermediate cutting changed the canopy gap, led to a decrease in crown closure. On the contrary, it caused an increase in plant species of shrub layer especially for the light-loving plants like Platycladus orientalis and Ailanthus altissima. Consistently, it could contribute to the herbs diversity, which caused improvements of diversity indexes like Simpson, Shannon-wiener and Gleason in pure pine stand and mixed pine-oak forest compared with that in CK. At the same time, the important values of Digitaria sanguinalis, Spodiopogon sibiricus and Carex rigescens elevated. (3) The tending measurement resulted in an improvement of soil pH, and a decrease of bulk density. As well, it had a potential to accelerate the nutrient metabolism for the increasing enzyme activities of catalase, phosphatase, sucrase and urease, which increased by 6.74%-29.33%, 4.79%-4.99%, 2.13%-10.34% and 1.25%-25.56%, respectively. It could be seen that the tending operation could benefit to the stand growth, enrich the undergrowth diversity, also improve the soil quality in different stand conditions.
