秦岭次生辽东栎林新生个体对种群空间格局的响应  

Responses of Newborn Individuals to Population Spatial Pattern in Secondary Quercus liaotungensis Forest in the Qinling Mountains

作　　者：吴润琴 邹书珍 康迪 WU Runqin;ZOU Shuzhen;KANG Di(Key Laboratory of Conservation and Utilization of Wildlife Resources in Southwest China(Ministry of Education),College of Life Sciences,China West Normal University,Nanchong 637009,China)

机构地区：[1]西南野生动植物资源保护与利用教育部重点实验室,西华师范大学生命科学学院,四川南充637002

出　　处：《四川林业科技》2020年第6期15-22,共8页Journal of Sichuan Forestry Science and Technology

基　　金：大熊猫栖息地内典型地震受损植被群落恢复构建机制——基于物种及功能性状的研究,国家自然科学基金项目(31800458)。

摘　　要：以秦岭次生辽东栎(Quercus liaotungensis)种群为对象,利用空间格局分析的有关方法,研究辽东栎种群结构以及幼苗更新对胸径格局、密度格局和竞争格局的响应。结果表明:种群小径级个体(DBH<16 cm)明显多于大径级个体(DBH≥16 cm);幼苗更新位置周围个体平均胸径(10.376 cm)小于样地平均水平(12.385 cm);幼苗更新位置种群密度(0.126株·m^−2)高于样地平均水平(0.084株·m^−2);幼苗更新位置的竞争指数处于样地的中等水平,规律不明显。为更加深入的了解次生森林更新机制提供一定参考价值。The secondary Quercus liaotungensis population in Qinling mountains was selected as the experimental object,and the population structure of Quercus liaotungensis and the responses of seedling regeneration to DBH pattern,density pattern and competition pattern were studied by using the relevant methods of spatial pattern analysis.The results showed that:(1)The number of small diameter individuals(DBH<16 cm)was significantly higher than that of large diameter individuals(DBH≥16 cm).(2)The average diameter at breast diameter(10.376 cm)around the seedling regeneration position was smaller than the average level of the plot(12.385 cm).(3)The population density of the seedling regeneration position(0.126 plants/m^2)was higher than the average level of the plot(0.084/m^2).(4)The competition index of seedling regeneration position was at a moderate level of the plot,and the law was not obvious.The results provided some certain reference value for a deeper understanding of the secondary forest regeneration mechanism.

关 键 词：更新 胸径 密度 竞争 辽东栎 

分 类 号：S718.5[农业科学—林学]