辽西地区油松纯林不同改造方式效果对比研究

Comparative study on effects of different transformation methods on Pinus tabulaeformis pure forests in western Liaoning Province

为探讨辽西地区油松纯林适宜的改造方式,对封育、不同阔叶树种混交改造后的油松林分的生长、土壤物理性质、植物多样性及天然更新情况进行对比研究,结果表明:封育油松纯林生长状况最好,其次是油松-刺槐、油松-毛黄栌、油松-山杏混交林。封育油松纯林、油松-山杏、油松-毛黄栌混交林土壤改良效果较好。封育油松纯林、油松-山杏、油松-柠条混交林各项多样性指数均较高。封育油松纯林天然更新树种种类及油松幼苗幼树数量最多,油松-柠条、油松-刺槐、油松-元宝槭混交林林下基本无油松天然更新。

To discuss the suitable transformation method for Pinus tabulaeformis pure forests in western Liaoning Province, the growth performance, soil physical properties, species diversity and natural regeneration of Pinus tabulaeformis pure stands after transformations by different methods were researched and compared in this study. The results showed：The growth performance of closed pure stands was the best, followed by Pinus tabulaeformis-Robinia pseudoacacia,Pinus tabulaeformis-Cotinus coggygria and Pinus tabulaeformis-Prunus sibirica mixed stands. The soil improvement effects of closed pure stands, Pinus tabulaeformis-Prunus sibirica, Pinus tabulaeformis-Cotinus coggygria mixed stands were better. The diversity indexes of closed pure stands, Pinus tabulaeformis-Prunus sibirica, Pinus tabulaeformis-Caragana microphylla were higher. The numbers of natural regeneration tree species and pine seedlings in closed pure stands were the biggest and there was none natural regeneration in Chinese pine stands mixed with Caragana microphylla, Robinia pseudoacacia and Acer truncate.