宝天曼自然保护区油松生长释放研究  

Research on Growth Release for Pinus tabulaeformis Carr. in Baotianman National Reserve

作　　者：杨国馨[1] 叶永忠[2] 袁志良[2] 潘娜[1] 王婷[1] 

机构地区：[1]河南农业大学林学院,郑州450002 [2]河南农业大学生命科学学院,郑州450002

出　　处：《河南科学》2012年第1期58-61,共4页Henan Science

基　　金："十一五"国家支撑计划课题(2008BAC39B02);河南农业大学人才引进基金(30700066);河南省高校青年骨干教师资助项目(20100601)

摘　　要：利用采自宝天曼自然保护区的一组油松(Pinus tabulaeformis Carr.)树轮样芯,根据树木年轮学的基本方法测量油松样芯的年轮宽度并交叉定年,通过生长变化率的大小对生长释放事件进行了判定.结果显示77.78%的油松有过一次以上的生长释放事件,平均每棵油松的释放次数为4.6次;随着油松年龄的增长,林窗逐渐开放,油松生长释放次数逐渐增多,不同年龄段31～40 a、41～50 a、51～60 a、>60 a的油松,平均每株释放次数分别为1.6、3.6、4.6、11.3次;不同年龄的油松在1969和1999年左右出现了较大的生长释放事件.Based on tree-ring samples of P tabulaeformis in Baotianman National Reserve, tree-rings were measured by basic way of dendrochronology method. P. tabulaeformis trees＇s growth release events were decided by growth change percentage. The results showed that 77.78% of the P. tabulaeformis tree samples had more than one growth release event, with average growth releases 4.6 times per tree. P. tabulaeformis growth release events were increased as the tree ages increased because of opening gap. P. tabulaeformis trees had 1.6, 3.6,4.6 and 11.3 release times respectively in different age groups 31-40 a,41-50 a,51-60 a and 〉60 a. The results showed that there were greater growth release events for P. tabulaeformis trees in 1969 and 1999.

关 键 词：树木年轮 生长释放 油松 宝天曼自然保护区 

分 类 号：S718.4[农业科学—林学]