基于灰色关联分析法,以北京市白皮松苗木为研究对象,探索白皮松价格影响因素与评估值的关联度。得到以下结论1.5m高白皮松,各指标与价格的关联系数排序为树冠饱满度>冠幅>枝条疏密度>成本>地径>(冠高枝下高)>枝下高>偏冠度;3m高白皮松,各指标与价格的关联系数排序为树冠饱满度>冠幅>枝条疏密度>偏冠度>冠高枝下高>枝下高>地径>成本;4m高白皮松,各指标与价格的关联系数排序为冠幅>树冠饱满度>枝条疏密度>偏冠度>枝下高>冠高枝下高>地径>成本;5m高白皮松,各指标与价格的关联系数排序为树冠饱满度>冠幅>枝条疏密度>偏冠度>冠高枝下高>枝下高>地径>成本。研究表明随着高度增加(苗高大于等于3m),同一高度白皮松树冠饱满度、冠幅、枝条疏密度、偏冠度对白皮松单株价格关联系数较大,枝下高、地径、生产成本和成交价格的关联系数一直较低。

In this article,Pinus bungeana Zucc.ex Endl.in Beijing was used as a research object to discover the correlation degree between the influencing factors and its evaluation which was based on the Grey correlation Analysis.The results indicated that when the height of Pinus bungeana was 1.5 m,the sequencing of the correlation coefficient was crown plumpness>crown width> the branches density>production cost> ground diameter>the rate of crown height and clear bole height >clear bole height> lopsided crown.When the height of Pinus bungeana was 5 m,the sequencing of the correlation coefficient was crown plumpness>crown width> the branch density> lopsided crown> the rate of crown height and clear bole height >clear bole height>ground diameter>production cost.With the increase of height(When the height of Pinus bungeana was equal or greater than 3.0 metre),the correlation coefficient between the single price and crown plumpness,branch density and lopsided crown was maximum,while it was always minimum between the single price and clear bole length,ground diameter,and production cost.