赵德兴 赵西平

摘要 [目的]研究蒙古栎材积生长的变异性。[方法]对7株蒙古栎材积生长的株内和株间变异性进行分析，拟合经验生长方程和理论生长方程。[结果]蒙古栎材积生长株间变异在幼龄期不明显，随时间增加而增大，生长速率稳定后，差异性存在且稳定增加。蒙古栎材积生长在株内的变异性较小，幼龄期至生长期生长速率加快，变异性有所增加，生长稳定后，差异性存在且稳定。[结论]蒙古栎在生长过程中材积变化受外界因素的干扰较小，可较准确预测未来几年的材积生长状况。

关键词 蒙古栎；材积；变异

Study on Variability of Volume Growth of Quercus mongolica

ZHAO De-xing1，ZHAO Xi-ping2

（1.Ruyang County Economic Forest Office， Ruayng， Henan 471200；2.Forestry College，Henan University of Science & Technology，Luoyang，Henan 471023）

Abstract [Objective]To study the variability of volume growth in Quercus mongolica. [Method]The intra-and inter plant variability of the volume growth of 7 Quercus mongolica trees was analyzed， and the empirical growth equation and the theoretical growth equation were fitted. [Result]The variation of tree volume growth in Quercus mongolica was not obvious in young period， and increased with time. After the growth rate was stable， the difference existed and increased steadily. The variation of Quercus mongolica volume growth within the plant was small， and the growth rate increased from the young to the growth stage， and the variability was increased. After the growth was stable， the difference existed and stabilized.[Conclusion]The growth of Quercus mongolica is less disturbed by external factors during its growth， so it can predict the volume growth of trees in the next few years.

Key words Quercus mongolica；Volume；Variability

蒙古栎（Quercus mongolica）是辽西地区很有发展潜力的阔叶乔木树种[1]，在目前木材需求愈发大的情况下，受到人们的青睐[2-5]。不同树龄时期都有其生长发育特点，对外界环境和栽培管理都有一定要求。研究树木不同年龄时期的生长发育规律，采取相应的栽培措施，促进或控制各年龄时期的生长发育节律，可达到幼树适龄开花结实，延长盛花盛果的观赏期，延缓树木衰老进程等树木栽培目的。笔者研究了蒙古栎在生长过程中材积生长量的变异性，特别是株间和株内的变异性，旨在为蒙古栎的栽培及采伐提供重要指导依据。

1 材料与方法

1.1 研究区概况

样地位于东北林业大学帽儿山森林生态系统定位研究站老爷岭生态站（127°30′～127°34′ E，45°20′～45°25′ N，海拔300 m），属于低山丘陵，坡向为西北，样地气候属温带大陸性季风气候，年均温21.6 ℃，年降水量723 mm，集中在7—8月，无霜期120～140 d，土壤为暗棕壤。……