Effects of Different Cutting Intensities on Seedling Regeneration of Quercus liaotungensis
Effects of different cutting intensities on seedling regeneration of Quercus liaotungensis were in-vestigated in Caijiachuan Forest Farm in Huanglong Mountain. Cutting intensities included fixed clear cutting, 30 ％ and 15 ％ thinning strength, and closed tending (control). Growth situations of seedlings and sprouts were investigated based on the four type plots. The results showed that the amount of seedlings and sprouts, the growth conditions, forestland growth indices were different among the four types. In the plot of 30 ％ thinning strength, significant increases were found in the indices such as seedling average basal diameter, average height, average crown width, average leaf area and average soil water content and nutrient, and these indices also increased in some extents in the 15 ％ thinning plot. Compared with the closed tending forestland, in clear cutting plot, the amount of sprouts increased while the amount of seedlings decreased, and the soil water content and nutrient also decreased. Compared with clear cutting, in thinning plots, the amount of seedlings increased, the individual developed well, and the soil water content and nutrient were higher. In clear cutting plot, the amount of sprouts increased but the soil water content and nutrient decreased. It was suggested that in the management of Q. liaotungensis forests, close-to-nature forest cutting management should be mainly adopted in Q. liaotungensis community to reduce the destruction of shrub and grass layer, and to improve the community complex structures. Thirty percent thinning strength should be drafted, canopy density should be controlled from 0. 5 to 0.7, ungraded woods and diseased woods should be thinned in order to promote the Q. liaotungensis community into unevenaged forest.
国家科技期刊平台
NSTL
万方数据
维普
