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›› 2007, Vol. 43 ›› Issue (zk): 83-88.

• 问题讨论 • 上一篇    下一篇

森林土壤氮素有效性的野外估测方法

陈伏生 曾德慧 范志平 赵琼   

  1. 中国科学院沈阳应用生态研究所大青沟沙地生态实验站,沈阳110016
  • 收稿日期:2006-04-25 修回日期:1900-01-01 出版日期:2007-10-25 发布日期:2007-10-25

Advances in in situ Assessment Methods of Forest Soil Nitrogen Availability

Chen Fusheng,Zeng Dehui,Fan Zhiping,Zhao Qiong   

  1. Daqinggou Ecological Station,Institute of Applied Ecology,Chinese Academy of Sciences Shenyang 110016
  • Received:2006-04-25 Revised:1900-01-01 Online:2007-10-25 Published:2007-10-25

摘要: 介绍野外估测森林土壤N有效性的常用方法,包括埋袋法、PVC顶盖埋管法、离子交换树脂袋法、树脂芯法、15N同位素法和生态系统N收支估算法。同时指出,传统的以土壤N矿化为N循环核心的理论受到挑战,新的理论体系中,把解聚合、植物-微生物竞争、微环境的作用作为N有效性估测的关键,为此,以上研究方法均存在局限性,N有效性的研究方法还有待进一步改进。

关键词: 森林土壤, 氮素有效性, 估测方法

Abstract: Evaluation methods for soil N availability are important to assess forest N cycling and its related issues.This paper reviewed the soil N availability in situ evaluation methods,which included buried-bag incubation,PVC closed-top tube incubations,ion exchange resin bags,resin cores,15N methods and ecosystem N budgets.As a result of the challenges to the classical soil N cycling paradigm,N mineralization being the perceived center point of the soil N cycle,ecologists provided the new paradigm,depolymerization,plant-microbe competition and microsite processes being the three key problems to assess soil N availability.Thus,all methods above were limited,and new method needed to be provided and developed as an urgent task in the future.

Key words: forest soil, nitrogen availability, evaluation methodology