摘要
为阐明羌活野生生境针阔混交林与人工栽培条件下土壤水分特征的差异,通过室内Hyprop仪+露点水势仪试验,测定与分析了针阔混交林土壤与大田土壤表层2~7 cm和亚表层10~15 cm的土壤基本理化性质、水分特征曲线及其特征参数等指标。结果表明:①针阔混交林土壤容重为0.33~0.52 g·cm^-3,显著小于大田土壤的对应值(1.01~1.18 g·cm^-3)(P<0.05)。有机质含量则显著大于大田土壤的对应值(P<0.05);②与大田土壤相比,针阔混交林土壤的饱和含水量θs、田间持水量θFC及能被植物有效利用的含水量θPAC均显著大于大田土壤的对应值(P<0.05),而不能被植物有效利用的滞留含水量θr则显著低于大田土壤的(P<0.05);③针阔混交林土壤中结构性孔隙含量(0.13~0.24 cm^3·cm^-3)和基质性孔隙含量(0.34~0.44 cm^3·cm^-3)分别大于大田土壤的对应值。综上所述,针阔混交林土壤容重低,结构和基质性孔隙度高,有机质含量高,能将更多的水分以有效水形式存储于土壤中满足羌活水分需求,从而利于形成羌活优质药材。该研究结果可为羌活人工栽培中通过改良土壤结构或调控土壤水分促进羌活优质药材的形成提供理论依据。
To clarify the difference of soil moisture characteristics between mixed broad leaf-conifer forest soil and artificial cultivation of Notopterygium incisum,the HYPROP system and the dew point potential meter were used to determine soil water retention curves(SWRC)for samples of two horizons(i.e.2-7 cm,10-15 cm).The basic physical and chemical properties of soil and its water characteristic parameters were also determined.The result showed as fllows:①The bulk density of mixed coniferous-broad leaf forest soil was between 0.33 and 0.52 g·cm^-3,significantly lower than the corresponding value of field soil(1.01-1.18 g·cm^-3)(P<0.05),While the organic matter content was significantly higher than the corresponding value of field soil(P<0.05).②The saturated water content(θs),field water holding capacity(θFC)and Water that can be effectively utilized by plants(θPAC)of mixed coniferous-broadleaved forest soil were significantly higher than the corresponding value of field soil(P<0.05),while the retained water content(θr)value that cannot be effectively utilized by plants was significantly lower than that of field soil(P<0.05).③The values of structural porosity(0.13-0.24 cm^3·cm^-3)and Matrix porosity(0.34-0.44 cm^3·cm^-3)of mixed coniferous-broadleaved forest soil were higher than the corresponding values of field soil.Therefore,with low bulk density and high content of organic matter,mixed coniferous-broadleaved forest soil can store more water in soil in the form of effective water to meet the needs of plants for water,thus possibly forming high quality medicinal materials of Notopterygii Rhizoma et Radix.In conclusion,the results of this study can provide theoretical basis guidance for soil structure improvement and water management to form high quality medicinal materials in the artificial cultivation of N.incisum.
作者
王红兰
杨萍
孙辉
杜玖珍
朱文涛
周毅
孙洪兵
蒋舜媛
WANG Hong-lan;YANG Ping;SUN Hui;DU Jiu-zhen;ZHU Wen-tao;ZHOU Yi;SUN Hong-bing;JIANG Shun-yuan(Sichuan Academy of Chinese Medicine Sciences,Chengdu 610041,China;Department of Environmental Science and Engineeringy Sichuan University,Chengdu 610065,China)
出处
《中国中药杂志》
CAS
CSCD
北大核心
2020年第16期3805-3811,共7页
China Journal of Chinese Materia Medica
基金
国家重点研发计划项目(2017YFC1700705)
国家自然科学基金项目(81473311)
全国第四次中药资源普查专项(财社[2017]66号)。
关键词
羌活
针阔混交林
大田
土壤水分特征曲线
含水量
Notopterygium incisum
mixed broad leaf-conifer forest
field
soil water characteristic curve
water content
