间伐对栓皮栎人工林林下更新的影响

栓皮栎是我国温带落叶阔叶林代表树种之一,是河南省山区典型地带性树种和主要造林树种。间伐作为一个重要的森林经营措施,研究其对林下更新的影响,可为改善栓皮栎人工林林分结构,维持林下物种多样性,制定科学合理的森林经营措施提供支撑。对间伐3 a后栓皮栎人工林林下幼苗更新物种及更新多样性进行调查,结果表明:间伐后林地内幼苗种类和数量显著增加,间伐样地内单物种更新密度和总更新密度均高于未间伐样地,间伐样地内更新苗Shannon-Wiener、Simpson多样性指数、Patrick丰富度指数值、Pielou均匀度指数均高于未间伐样地相应数值,间伐有利于栓皮栎人工林林分结构优化和林分健康。

Effect of Thinning on the Understory Regeneration of Quercus Variabilis Plantation

Quercus variabilis is one of the representative tree species of temperate deciduous broad-leaved forests in my country.It is a typical zonal tree species and main afforestation tree species in the mountainous areas of Henan Province.As an important forest management measure,thinning is to study the impact of thinning on understory renewal,to promote the optimization of the structure of variegated oak plantations,maintain the diversity of understory species,and provide support for formulating scientific and reasonable forest management measures.The renewal species and renewal diversity of the understory seedlings of the Quercus variabilis plantation were investigated three years after thinning.The results showed that the species and number of seedlings in the woodland increased significantly after thinning.The single species regeneration density and the total regeneration density in the thinned plot were higher than those in the unthinned plot.The regeneration seedlings Shannon-Wiener,Simpson diversity index,and Patrick richness in the thinned plot The index value and Pielou evenness index are higher than the corresponding values of the unthinned plot,which is conducive to the optimization of the structure and the health of the plantation of Quercus variabilis.