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基于气象因子的柏木属植物引种成活率预测模型

2017-07-13殷茜刘兴剑任全进李亚

安徽农业科学 2017年24期

殷茜 刘兴剑 任全进 李亚

摘要 [目的]探索柏木属(Cupressus L.)植物在南京中山植物园的引种成活率与来源地各气象因子之间的关系。[方法]根据1976年以来的档案数据,通过主成分分析法对气象因子参数进行降维处理,得到2个相互独立的主成分;以主成分为自变量,平均成活率为因变量,利用回归分析法建立引种成活率预测模型。[结果]引种成活率预测模型为:Y=88.480+0.028Z1-0.10Z2,其中主成分Z1温光条件因子是决定引种成活率最主要的因素。[结论]该模型可为柏木属植物引种前评估提供理论依据。

關键词 柏木属植物;引种成活率;气象因子;主成分分析法;回归分析

Prediction Model of Survival Rates of Introduced Cupressus Plants Based on Meteorological Factors

YIN Qian, LIU Xing-jian, REN Quan-jin et al

(Institute of Botany, Jiangsu Province and Chinese Academy of Sciences/Nanjing Botanical Garden Mem. Sun Yat-sen, Nanjing, Jiangsu 210014)

Abstract [Objective] The aim was to study the relationship between the survival rate of introduced Cupressus plants in Nanjing botanical garden Mem. Sun Yat-sen and the environmental factors of source area. [Method] The data from 1976 to now was studied by the principal component analysis(PCA). The meteorological parameters were reduced to 2 independent principal components. With the principal components as independent variable, the average survival rate as dependent variable, the regression analysis method was used to establish the prediction model of the survival rate. [Result] The prediction model of the survival rate was as followed:Y=88.480+0.028Z1-0.10Z2, the main component Z1 as temperature and light condition factor was the most important factor determining survival rate of introduction. [Conclusion] This model can provide the basis for the evaluation of Cupressus plant introduction.

Key words Cupressus plant;Survival rate of introduced plants;Meteorological factors;Principal component analysis;Regression analysis

柏科(Cupressaeeae)柏木属(Cupressus L.)是一个古老的属,起源于地中海地区,分布于北美南部、亚洲东部、喜马拉雅山区及地中海等温带及亚热带地区,共约20种,其中4种为我国特有[1-2]。柏木属植物多为高大常绿乔木,叶鳞形,树冠浓绿秀丽、材质细密,可供建筑、桥梁、家具等用材,枝叶可提供芳香油,亦可作园林观赏[3]。南京中山植物园自1929年建园至今,从国内外引种大量柏木属植物,经过几十年的引种实践,部分引种成功,部分植物因为不适宜而死亡。植物的引种驯化是一门综合性的应用科学,气象相似论是重要的理论基础之一[4],为揭示气象因子与柏木属植物引种成活率的相关性,笔者收集了该属12种植物引种来源地的气象信息,并在此基础上运用主成分回归分析法,构建了柏木属植物引种成活率预测模型。

1 材料与方法

1.1 栽培地自然……

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