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玉竹品质与主要生态因子的相关性
引用本文:卜静,李登武,王冬梅.玉竹品质与主要生态因子的相关性[J].应用生态学报,2012,23(6):1447-1454.
作者姓名:卜静  李登武  王冬梅
作者单位:(西北农林科技大学林学院, 陕西杨凌 712100 )
基金项目:国家林业公益性行业科研专项(200904004);西北农林科技大学“青年学术骨干支持计划”项目(Z111020902);陕西省科技攻关项目(2009K19-06)资助
摘    要:采用逐步回归、主成分分析和灰色关联度分析等方法,研究不同产地野生玉竹的有效成分(多糖、水溶物和醇提物)含量和抗氧化活性与主要生态因子的相关性.结果表明: 1月均温、7月均温、年降水量、无霜期、土壤pH和全钾含量是影响玉竹有效成分含量的主要生态因子,对玉竹有效成分含量变化的影响程度占99.0%.与土壤因子相比,气候因子对3种有效成分含量的影响较大;土壤全钾含量是对玉竹有效成分含量直接影响最大的因素,年降水量是最主要的决策因素,1月均温是最主要的限制因素.多糖和水溶物含量是影响玉竹抗氧化活性的主要因子,玉竹对DPPH自由基的清除能力随多糖和水溶物含量的增加而增大.

关 键 词:玉竹  生态因子  有效成分  逐步回归分析  灰色关联度分析  

Correlations between wild Polygonatum odoratum quality and main ecological factors
Bu Jing,Li Deng-Wu,Wang Dong-Mei.Correlations between wild Polygonatum odoratum quality and main ecological factors[J].Chinese Journal of Applied Ecology,2012,23(6):1447-1454.
Authors:Bu Jing  Li Deng-Wu  Wang Dong-Mei
Institution:(College of Forestry, Northwest A & F University, Yangling 712100, Shaanxi, China)
Abstract:By the methods of stepwise regression, principal component analysis, and grey relational grade analysis, this paper studied the correlations between the effective components (polysaccharides and water- and alcohol-soluble substances) contents and antioxidant activity of wild Polygonatum odoratum in different places and the ecological factors. Among the test ecological factors, the mean air temperature in January and in July, mean annual precipitation, frost-free period, and soil pH and total potassium were the main factors affecting the effective component contents of P. odoratum, with a contribution rate of 99.0%. As compared with soil factors, climatic factors made more contribution to the effective component contents. Soil total potassium was the key factor controlling the effective component contents, mean annual precipitation was the main decision factor, and mean air temperature in January was the main limiting factor. The plant polysaccharides and water-soluble substance contents were the key factors affecting the antioxidant activity of P. odoratum, and the capability of P. odoratum in excavating DPPH free radical increased with increasing contents of polysaccharides and water-soluble substances.
Keywords:Polygonatum odoratum  ecological factor  effective component  stepwise regression analysis  grey relational grade analysis  
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