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 Engineering, Sichuan University Chengdu 610065, China.
Zhongguo Zhong Yao Za Zhi. 2020 Aug;45(16):3805-3811. doi: 10.19540/j.cnki.cjcmm.20200506.102.
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(θ_s), field water holding capacity(θ_(FC)) and Water that can be effectively utilized by plants(θ_(PAC)) of mixed coniferous-broadleaved forest soil were significantly higher than the corresponding value of field soil(P<0.05), while the retained water content(θ_r) 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 cm3·cm(-3)) and Matrix porosity(0.34-0.44 cm3·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.
为阐明针阔混交林土壤与人工栽培羌活土壤水分特征的差异，采用HYPROP系统和露点电位仪测定了两个土层（即2 - 7厘米、10 - 15厘米）样品的土壤水分保持曲线（SWRC）。同时还测定了土壤的基本理化性质及其水分特征参数。结果如下：①针阔混交林土壤的容重为0.33 - 0.52克·厘米⁻³，显著低于田间土壤的相应值（1.01 - 1.18克·厘米⁻³）（P<0.05），而有机质含量显著高于田间土壤的相应值（P<0.05）。②针阔混交林土壤的饱和含水量（θ_s）、田间持水量（θ_(FC)）和植物可有效利用水（θ_(PAC)）均显著高于田间土壤的相应值（P<0.05），而植物不能有效利用的持水量（θ_r）值显著低于田间土壤（P<0.05）。③针阔混交林土壤的结构孔隙度（0.13 - 0.24厘米³·厘米⁻³）和基质孔隙度（0.34 - 0.44厘米³·厘米⁻³）值高于田间土壤的相应值。因此，针阔混交林土壤容重低、有机质含量高，能以有效水的形式在土壤中储存更多水分，以满足植物对水分的需求，从而可能形成高品质的羌活药材。综上所述，本研究结果可为羌活人工栽培中土壤结构改良和水分管理以形成高品质药材提供理论依据指导。
