【摘要】 蒙古栎具有很高的经济和生态价值,在维护区域木材安全和生态安全方面具有重要作用。该研究对辽东山区不同林龄蒙古栎次生林的结构及生态因子进行分析,结果表明,辽东山区蒙古栎次生林林分的直径分布整体表现为正态分布,径级结构q值显示大多林分结构需要调整;蒙古栎林分水平分布特征表现为随机分布,平均角尺度处于0.475～0.517;区域蒙古栎次生林土壤养分总体表现出随林龄增加而增加的趋势,成熟林的土壤有机碳和全氮含量均显著高于幼龄林和中龄林;综合区域天然蒙古栎林群落组成、林分结构和土壤养分等特征参数进行主成分分析,林地土壤养分、林分的角尺度和混交度是区域蒙古栎次生林林分特征因子。该研究成果可为提高区域蒙古栎林地生产力,改善林分质量提供科学参考。更多还原

【Abstract】 Quercus mongolica has high economic and ecological value and plays an important role in maintaining regional wood safety and ecological security. In present study, the structure and ecological factors of secondary forests of Q. mongolica of different stand ages in the mountainous area of eastern Liaoning province were analyzed. The results indicated that the diameter distribution of Q. mongolica secondary forests in eastern Liaoning was normal, and the diameter class structure q value showed that most of the stand structures needed to be regulated. The horizontal distribution of the Quercus mongolica forests was random, and the average angular scale was 0. 475 ～ 0. 517. The soil nutrient contents in the secondary forests of Quercus mongolica increased with the increase of stand age, and the soil organic carbon and total nitrogen contents in the mature forests were significantly higher than those in the young and middle-age forests.Based on the principal component analysis of the community composition, stand structure and soil nutrients, the soil nutrients,stand angular scale and mingling state were the characteristic factors of the regional natural Quercus mongolica forests. These results could provide scientific basis for improving productivity and stand quality of Quercus mongolica forests in the Northeast China.更多还原