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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (6): 269-274.

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

丛枝菌根真菌根外菌丝对紫色土中的氮素利用状况

彭思利,邓胤,张宇亭   

  • 收稿日期:2009-11-04 修回日期:2009-11-09 出版日期:2010-03-20 发布日期:2010-03-20
  • 基金资助:

    丛枝菌根真菌侵染影响土壤结构作用与机制研究;菌根菌丝吸收不同形态无机氮的生理机制研究

Research on Nitrogen Utilization in the neutral purple soil by the external hyphae of Arbuscular Mycorrhiza

  • Received:2009-11-04 Revised:2009-11-09 Online:2010-03-20 Published:2010-03-20

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摘要：

摘 要：本研究采用修改后的Hawkins and George（1999）的装置，并以中性紫色土壤为基质模拟自然生长环境，研究根外菌丝对土壤中的氮素的利用状况。结果表明：接种Glomus intraradices发挥了较好的菌根效应，相对不接种处理，普遍提高了玉米地上部和根系的氮、磷营养状况；根外菌丝能扩大根系对氮素的吸收范围，扩大的吸收范围应不小于5cm；而根外菌丝利用的氮素形态主要是无机态的氮。

关键词: 林地土壤, 林地土壤, 环境质量评价, 重金属元素, 内梅罗污染指数, 锑矿区

Abstract:

Abstract:To investigate the Nitrogen Utilization in the neutral purple soil by the external hyphae of Arbuscular Mycorrhiza(AM), the modified Hawkins and George (1999) devices was used to simulate a natural growing environment, made the soil as the substance, and as far as possible to eliminate the interference of phosphorus. The results showed that inoculation with Glomus intraradices increased both of the nitrogen and phosphorus status in the maize shoot and root, and played a good role. The external hyphae of Arbuscular Mycorrhiza can expand the scope of ,and the distance should not be less than 5cm. Besides, the main form of nitrogen used by the external hyphae is inorganic nitrogen.