贵州头花蓼的适生地土壤肥力与没食子酸含量分析

目的:探讨贵州头花蓼适生地土壤肥力与没食子酸含量的关系,以期为头花蓼的选地栽培提供参考。方法:测定贵州41个适生地头花蓼药材中没食子酸及其根部土壤中肥力指标的含量,用SPSS 16.0软件对结果进行分析。结果:近70%头花蓼居群中没食子酸的含量集中在0.15%～0.25%,药材质量差异水平不大;头花蓼根部土壤中可利用的铵态氮和有机质水平偏低,植物对钾与磷元素的需求相对偏高,酸碱度为5.65～7.73,适生地土样呈微酸至中性土壤;相关性分析显示,不同土壤质地以及不同居群土壤养分条件对头花蓼没食子酸的积累影响不明显。结论:建议在头花蓼的栽培中,选择中性或微酸性的砂质壤土、相对肥沃、排灌方便的地块,并在其生长过程中注意维持有效钾与速效磷的水平不低于60.0,100.0 mg.kg-1为宜。

Analysis on Soil Fertility and Gallic Acid Content of Polygonum capitatum from Guizhou Province

Objective:To study the relationship between the gallic acid content in Polygonum capitatum and soil fertility in different adaptation areas in Guizhou.The aim is to provide reference for the cultivation of P. capitatum. Method: The gallic acid contents and soil fertility indices on roots of P. capitatum from 41 adaptation areas were determined, and the data was analyzed by SPSS 16.0. Result: The content of gallic acid in almost 70% different populations was 0.15 %-0.25 %.The content of available ammonium nitrogen and organic matter in the soil is low; P. capitatum needs relatively more potassium and phosphorus; PH 5.65-7.73, suitable soil is slightly acidic or neutral. The correlation analysis shows that soil texture and fertility did not obviously effect the accumulation of the gallic acid content. Conclusion: During the cultivation of P. capitatum, it is recommended to choose a neutral or subacidic sandy loam, relatively fertile and convenient drainage-irrigation land, meanwhile, pay attention to maintain potassium and available phosphorus not less than 60.0, 100.0 mg·kg^-1 respectively in its growth process.