不同遮荫条件对蒙古栎幼苗生长及光合特性的影响

Effects of Different Shading Conditions on Growth and Photosynthetic Characteristics of Querciis mongolica Fisch Seedlings

蒙古栎是分布中国北方的一种栎树,国家二级珍贵树种,也是中国东北林区中主要的次生林树种,为了研究不同遮荫条件对蒙古栎幼苗生长的影响,通过设计4种不同相对光强的遮荫处理:重度遮荫(25%)、中度遮荫(50%)、轻度遮荫(75%)和全光照(100%),对2a生蒙古栎幼苗生长量、形态特征以及光合特性进行分析比较。结果表明:中度遮荫会促进蒙古栎苗高的生长,而遮荫对于蒙古栎地径的生长、叶绿素含量、单株生物量以及最大光合速率等起抑制作用。该研究为东北地区蒙古栎育苗造林和经营管理提供了理论依据。

Quercus mongolica is a kind of oak tree in the north of China. The two precious tree species in the country are also the main secondary forest species in the Northeast China. In order to study the influence of different shade conditions on the growth of the Quercus mongolica seedlings, 4 different shade treatments are designed: severe shade,moderate shade,light shade and all light,to two The growth,morphological characteristics and photosynthetic characteristics of annual Mongolia oak seedlings were analyzed and compared. The results showed that moderate shade could promote the growth of Quercus mongolica seedlings,while shading inhibited the growth, chlorophyll content, biomass of single plant and maximum photosynthetic rate of Quercus mongolica. This study provides a theoretical basis for planting and management of Quercus mongolica seedlings in Northeast China.