Ran Ran, Zhang Wen-Hui, He Jing-Feng, Zhou Jian-Yun
Ying Yong Sheng Tai Xue Bao. 2014 Mar;25(3):695-701.
Taking the natural Quercus variabilis forest in Shangluo, south slope of Qinling Mountains as the object in May 2006 and August 2011, which was under close-to-natural management of different thinning intensities (30%, 20%, 10%), and the un-thinned forest as the control, changes of the stand growth situation before and after thinning, population regeneration, species diversity and soil fertility after 5 years of thinning were analyzed, and the effects of thinning on forestland revegetation and community development were evaluated comprehensively. The results showed that the number of 1-6 years old Q. variabilis seedlings increased with increasing thinning intensity, while no significant difference was found for above 6 years old seedlings. The regeneration potentials of population under 10%, 20% and 30% thinning were respectively increased by 10.8%, 28.5% and 32.9% compared with the control. Thinning promoted the DBH and crown of the trees and shrubs, as well as the height of shrubs, especially for light-loving plants, and the effect of promotion increased with increasing thinning intensity. The species diversity and soil fertility were improved after thinning, in order of 30% > 20% > 10% > control. The thinning intensity of 30% (canopy density 0.6) was more conducive to the continuable development of the natural Q. variabilis forest in which canopy density was above 0.85.
2006年5月和2011年8月，以秦岭南坡商洛地区的天然栓皮栎林为研究对象，该林分处于不同间伐强度（30%、20%、10%）的近自然经营状态，以未间伐林分为对照，分析间伐前后林分生长状况变化、种群更新、物种多样性以及间伐5年后的土壤肥力情况，并综合评价间伐对林地植被恢复和群落发展的影响。结果表明，1 - 6年生栓皮栎幼苗数量随间伐强度增加而增多，6年生以上幼苗数量差异不显著。与对照相比，10%、20%和30%间伐强度下种群的更新潜力分别提高了10.8%、28.5%和32.9%。间伐促进了乔木和灌木的胸径和冠幅以及灌木的高度增长，尤其是对喜光植物，促进效果随间伐强度增加而增强。间伐后物种多样性和土壤肥力得到改善，改善程度为30%＞20%＞10%＞对照。30%（郁闭度0.6）的间伐强度更有利于郁闭度在0.85以上的天然栓皮栎林的可持续发展。
