六盘山林区华北落叶松林测树因子相关性分析  

Correlation Analysis of Larix principis-rupprechtii Tree-measuring Factors in Liupan Mountain Area

作　　者：王正安 余治家 马杰 佘萍 李颖 贾宝光 WANG Zheng-an;YU Zhi-jia;MA Jie(Guyuan Branch of Ningxia Academy of Agriculture and Forestry Sciences,Guyuan,Ningxia 756000)

机构地区：[1]宁夏农林科学院固原分院,宁夏固原756000

出　　处：《安徽农业科学》2021年第3期112-115,118,共5页Journal of Anhui Agricultural Sciences

基　　金：国家重点研发计划项目(2017YFC0504602);宁夏回族自治区财政林业补助资金项目(宁林发〔2020〕26号);宁夏回族自治区重大专项(QCYL-2018-12);宁夏回族自治区财政林业补助资金项目(宁林发〔2018〕171号)。

摘　　要：[目的]对宁夏林区华北落叶松人工林树高-胸径等林分特征结构进行相关性分析。[方法]采用野外观测的方法,得到华北落叶松人工林树高、胸径、冠幅等林分结构特征指标。[结果]冠幅-胸径存在极弱相关,树高-胸径最优曲线模型为H=2.411+1.425D-0.039D 2+0.000427D 3(H为树高,D为胸径),树高-冠幅最优曲线模型为H=0.299G 0.814(H为树高,G为冠幅),材积-胸径最优曲线模型为V=0.000204D 2.406(V为材积,D为胸径)。[结论]幂函数曲线模型能够很好地拟合胸径-材积相关性(R 2=0.957),所选最优曲线模型V=0.000204D 2.406可用来估算华北落叶松人工林胸径、材积的值,从而提高模型预测能力。[Objective]To study the regression equation of height-DBH relationship of Larix principis-rupprechtii plantation in Liupanshan,Ningxia.[Method]Based on the experimental method of field observation,the stand structure indexes of L.principis rupprechtii plantation were obtained,such as height,DBH and crown width.[Result]There was a very weak correlation between crown width and DBH.The optimal curve model of tree height and DBH was H=2.411+1.425D-0.039D 2+0.000427D 3(H was tree height,D was DBH),H=0.299G 0.814(H was tree height,G was crown width),and V=0.000204D 2.406(V was volume,D was DBH).[Conclusion]The power function curve model can fit the DBH volume correlation well(R 2=0.957),and the curve model V=0.000204D 2.406 can be used to estimate the DBH and volume of Larix principis-rupprechtii plantation,so as to improve the prediction ability of the curve model.

关 键 词：华北落叶松林 树高 胸径 曲线模型 

分 类 号：S791.22[农业科学—林木遗传育种]