为深入探究林木的生长规律、更好地保护珍稀树种,对七姊妹山黄杉群落进行了调查。选用7种常见的回归模型对黄杉的胸径-年龄、树高-年龄、树高-胸径之间关系进行分析。结果显示:黄杉的胸径、树高与树龄成正相关,树高与胸径也成正相关,三次曲线模型可以很好地表达黄杉胸径-年龄和树高-年龄关系,表达式为:y=-0.0001x3+0.011x2+0.179x+4.44及z=0.00007x3-0.015x2+1.105x-10.81;幂函数z=1.778y0.659是描述黄杉树高-胸径关系的最优模型,并对其可靠性进行了检验,结果显示:实测值和预测值无显著差异(P＞0.05),表明所选的最优方程可以用来估算黄杉年龄、胸径和树高的值。本文可为该区域黄杉生长规律和预测林木蓄积量研究提供理论支撑。
A survey was conducted in Qizimei Mountains Nature Reserve about the Pseudotsuga sinensis communities to further analyze the growth of regular trees and better protect the rare species.Meanwhile,seven common regression models were applied to study the correlation of the DBH and age,tree height and age,tree height and DBH of the Pseudotsuga sinensis.The results showed that there is a positive correlation between DBH and age,tree height and age of the Pseudotsuga sinensis,as well as DBH and tree height.The cubic equations perform the best for describing the relationship between age and DBH,age and height.The equation are:y=-0.0001x3+0.011x2+0.179x+4.44 and z=0.00007x3-0.015x2+1.105x-10.81;Moreover,the best correlation model is z=1.778y0.659 for modeling of tree height and DBH.The optimal models were tested for reliability and the result shows there is no significant difference between predicted and observed values(P＞0.05),which demonstrated the best models can be used to estimate the value of age,tree height and DBH of the Pseudotsuga sinensis.Furthermore,the study can further provide theoretical support for the regional research on the growth of the regular Pseudotsuga sinensis and the prediction of the forest volume.
[1] Lei X D,Peng C H,Wang H Y,et al.Individual height-diameter models for young black spruce and jack pine plantations in New Brunswick,Canada.[J].Forestry Chronicle,2009,85(1):43-56.
[2] Peng C,Zhang L,Liu J.Developing and validating Nonlinear Height-Diameter Models for Major Tree Species of Ontario's Boreal Forests[J].Northern Journal of Applied Forests,2001,18(3):87-94.
[3] 邓坤枚,邵彬,李飞.长白山北坡云冷杉林胸径、树高结构及其生长规律的分析[J].资源科学,1999(1):79-86.
[4] 代力民,孙伟中,邓红兵,等.长白山北坡椴树阔叶红松林群落主要树种的年龄结构研究[J].林业科学,2002(3):73-77.
[5] 吴承祯,洪伟.长苞铁杉种群个体年龄与胸径的多维时间序列模型研究[J].植物生态学报,2002(4):403-407.
[6] 胡云云,亢新刚,赵俊卉.长白山地区天然林林木年龄与胸径的变动关系[J].东北林业大学学报,2009,11:38-42.
[7] 孟宪宇.天然兴安落叶松林年龄结构的分析[J].北京林业大学学报,1989(3):17-23.
[8] 李海奎,法蕾.基于分级的全国主要树种树高-胸径曲线模型[J].林业科学,2011(10):83-90.
[9] 胥辉,全宏波,王斌.思茅松标准树高曲线的研究[J].西南林学院学报,2000,20(2):74-77.
[10] 徐悦,陈昌华,蒋之富,等.天然赤松胸径与树高相关模型的研究[J].林业调查规划,2008(3):56-58.
[11] 张少冰,郭署生,蒋建军.湖南阳明山黄杉林群落的研究[J].生命科学研究,2004(2):178-184.
[12] 李明刚,谢双喜.黔北喀斯特山地黄杉林群落及种群结构研究[J].天津农业科学,2015(9):150-153.
[13] 徐期瑚,喻勋林.湖南阳明山黄杉群落特征的初步研究[J].福建林业科技,2010(2):10-14.
[14] 孟宪宇.测树学[M].北京:中国林业出版社,1996.
[15] 王艺晴,李凤日,赵颖慧,等.基于大比例尺航片的树种结构空间分布分析[J].森林工程,2013(2):32-37.
[16] 王晓林,郭斌.柞树树高与胸径相关关系的研究[J].森林工程,2012(6):18-21.
[17] 胡志伟,沈泽昊,吕楠,等.地形对森林群落年龄及其空间格局的影响[J].植物生态学报,2007(5):814-824.
[18] 张敏,顾凤歧,董希斌.帽儿山林区主要树种树高与胸径之间的关系分析[J].森林工程,2014(6):1-4.
