思茅松产脂量相关生态因子的主成分分析  

Principal Component Analysis of Ecological Factors Related to Resin Yield in Pinus kesiya var.langbianensis

作　　者：陈伟 陈绍安 罗婷 李江 CHEN Wei;CHEN Shao-an;LUO Ting;LI Jiang(Yunnan Academy of Forestry and Grassland,Kunming Yunnan 650201,P.R.China)

机构地区：[1]云南省林业和草原科学院,云南昆明650201

出　　处：《西部林业科学》2023年第1期27-33,共7页Journal of West China Forestry Science

基　　金：云南省技术创新人才培养对象项目(202105AD160016);云南省林业和草原科学院思茅松现代森林培育技术研发省创新团队项目(202105AE160008);云南省种子种业联合实验室项目(202205AR070001-17);西部之光访问学者项目。

摘　　要：为探讨生态因子对思茅松产脂量的影响,基于56个思茅松天然林样方调查资料,对思茅松产脂量、6个地理因子和19个生物气候因子进行相关性研究及主成分分析。结果显示:思茅松产脂量与经度、纬度、坡度、坡向呈负相关,与海拔、坡位呈正相关,但均未达到显著相关的水平(P>0.05);思茅松产脂量与年均气温、最冷月最低气温、湿季平均气温、暖季平均温度成显著的负相关关系(P<0.05);通过主成分分析,温度因子、雨季水分因子、旱季水分因子和地形因子4个主成分可以反映25个生态因子的特征,其特征值均大于1,累计贡献率达86.44%。研究结果可为思茅松高产脂人工林的林地选择提供依据。In order to explore the effect of ecological factors on the resin yield of Pinus kesiya var.langbianensis,the correlation and principal component analysis of resin yield,6 geographical factors and 19 biological-climatic factors were conducted based on the survey data of 56 natural forest quadrats of P.kesiya var.langbianensis.The results showed that the resin yield of P.kesiya var.langbianensis was negatively correlated with longitude,latitude,slope and aspect,and positively correlated with altitude and slope position,but did not reach the level of significant correlation(P>0.05).The resin yield was significantly negatively correlated with the annual mean temperature,the minimum temperature of the coldest month,the mean temperature of the wettest quarter and the mean temperature of the warmest quarter(P<0.05).The principal component analysis showed that 25 ecological factors were integrated into 4 principal components,their eigenvalues were all greater than 1,and their additive contributing rate came up to 86.44%.The results can provide a basis for the selection of high resin yield plantation land in P.kesiya var.langbianensis.

关 键 词：思茅松 产脂量 生态因子 主成分分析 

分 类 号：S791.259[农业科学—林木遗传育种]