野生与人工种植的辽东楤木土壤理化性质及生理特性差异

Differences in soil physio-chemical properties and plant physiological characteristics for Aralia elata (Miq.) Seem under artificially planted and naturally distributed conditions

  • 摘要: 基于辽东楤木野生资源少、原生境破坏严重、人工种植易死亡及成林困难等一系列问题,对东北林区人工种植地与野生分布的辽东楤木展开调查研究,探讨不同栽培方式下辽东楤木生理特性与土壤理化性质等方面的差异,为人工种植条件下辽东楤木的丰产增收提供依据。研究表明,辽东楤木喜温润湿,在pH 5.13 ~ 5.24偏酸性的土壤环境下生长最为适宜;其存活率与抽条率关系密切,土壤电导率高低与盐度大小也影响辽东楤木的生长状况,高盐度与高电导率均降低其根系活力;人工种植地内,其叶片的丙二醛含量高于野生分布区,可溶性糖、可溶性蛋白含量及土壤表层全氮、碱解氮、全磷、速效磷、速效钾和全碳含量均低于野生分布区。人工种植辽东楤木应适当施用氮、磷、钾复合肥料,从而提高其存活率和抗性。

     

    Abstract: Considering the lack of wild species resources of Aralia elata (Miq.) Seem, serious destruction of original habitat, low survival rate of artificial planting and low forest establishment, we investigated the differences in physiological and soil physicochemical properties between artificially planted and naturally distributed A. elata in the Northeast China, so as to improve the yield and income of A. elata vegetations. The results showed that A. elata plants adapts to warm moist soil and grow well in acidic soil with pH 5.13 ~ 5.24. The survival rate of A. elata is related to the shoot shriveling rate. Soil electrical conductivity and salinity affect the growth of A. elata. High salinity and conductivity reduces root vitality. The content of malondialdehyde in the leaves of artificially planted A. elata is higher than that in naturally distributed one, while the contents of soluble sugar, soluble protein, total nitrogen, alkali-hydrolyzed nitrogen, total phosphorus, available phosphorus, available potassium and total carbon in surface soil of artificial plantation are significantly lower than those in natural growth region. To sum up, the integrated combination of nitrogen, phosphorus and potassium should be applied properly for the cultivation of A. elata, which would improve the resistance and survival rate of A. elata.

     

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