Variations of Carbon, Nitrogen and pH Value in Rhizosphere and Non Rhizosphere Soil in Rare Earth Mining Area in Southern China

ZHANG Qingqing; CHEN Zhiqiang; CHEN Zhibiao; MA Xiuli

doi:10.13961/j.cnki.stbctb.2017.03.018

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Variations of Carbon, Nitrogen and pH Value in Rhizosphere and Non Rhizosphere Soil in Rare Earth Mining Area in Southern China

- Variations of Carbon, Nitrogen and pH Value in Rhizosphere and Non Rhizosphere Soil in Rare Earth Mining Area in Southern China
- Bulletin of Soiland Water Conservation Vol. 37, Issue 3, Pages: 102-106(2017)
- 作者机构：
  
  1. 福建师范大学地理科学学院,福建,福州,350007
  2. 湿润亚热带山地生态国家重点实验室培育基地,福建,福州,350007
  3. 福建师范大学地理研究所,福建,福州,350007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2017.03.018
  CLC：
- Published：2017
- 稿件说明：
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ZHANG Qingqing, CHEN Zhiqiang, CHEN Zhibiao, et al. Variations of Carbon, Nitrogen and pH Value in Rhizosphere and Non Rhizosphere Soil in Rare Earth Mining Area in Southern China[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 102-106.
DOI：

ZHANG Qingqing, CHEN Zhiqiang, CHEN Zhibiao, et al. Variations of Carbon, Nitrogen and pH Value in Rhizosphere and Non Rhizosphere Soil in Rare Earth Mining Area in Southern China[J]. Bulletin of Soiland Water Conservation, 2017, 37(3): 102-106. DOI： 10.13961/j.cnki.stbctb.2017.03.018.

摘要

[目的] 揭示南方稀土矿区根际与非根际养分含量变化，为南方稀土矿区的生态恢复和侵蚀退化区的水土保持提供科学依据。[方法] 以福建省长汀县稀土矿治理区为研究对象，采用野外调查与室内分析相结合的方法，选取3个稀土矿开采区进行植物样方调查及土壤取样，对研究区的主要水土保持植物（芒萁、枫香）根际与非根际土壤碳氮含量、pH值变化以及根际与非根际间土壤碳氮含量、pH值的差异性进行研究分析。[结果] （1）随着治理年限的增加，芒萁根际土壤的有机碳、全氮含量逐渐升高，硝态氮含量逐渐减少，pH值先增加后减少，铵态氮含量无显著性差异；枫香根际土壤的硝态氮随着治理年限的增加而减少，而有机碳、全氮、铵态氮含量和pH值均无显著性差异。（2）随着治理年限的增加，芒萁非根际土壤的有机碳、全氮、铵态氮、硝态氮均无显著性差异，pH值先增加后减少；枫香非根际土壤的有机碳、全氮、铵态氮、硝态氮、pH值均无显著性差异。（3）芒萁根际土壤的有机碳含量显著高于非根际土壤的有机碳含量，全氮、铵态氮、硝态氮和pH值均无显著性差异；而枫香根际与非根际土壤养分含量均无显著性差异。[结论] 植被能够改善土壤，但土壤肥力恢复却是一个长期的过程。

Abstract

[Objective] To reveal the variations of nutrients in rhizosphere and non-rhizosphere soil in rare earth mining area in Southern China

and to provide scientific basis and data support for local ecological restoration and soil and water conservation in erosive area.[Methods] Sample survey of rare mine in Changting County of Fujian Province was conducted and soil samples were assayed indoor to obtain carbon and nitrogen contents

pH values of two main soil and water conservation plants (Dicranopteris dichotoma and Liquidambar formosana) in three mines with different rehabilitation ages

and their values in the rhizosphere and the non-rhizosphere were compared among the three mines.[Results] (1) With the prolongation of mine harness

nutrients in D. dichotoma rhizosphere soil exhibited different changes:the contents of organic carbon and total nitrogen both increased

nitrate nitrogen content gradually reduced

pH value increased first and then decreased

ammonium nitrogen had no obvious change. In Liquidambar rhizosphere

the nitrate nitrogen content decreased

organic carbon

total nitrogen

ammonium nitrogen

pH value had no significant differences. (2) With the prolongation of harness

items of organic carbon

total nitrogen

ammonium nitrogen

nitrate nitrogen in D. dichotoma non-rhizosphere soil all had no significant difference; pH value increased first and then decreased. In L. formosana non rhizosphere soil

no significant differences of organic carbon

total nitrogen

ammonium nitrogen

nitrate nitrogen

pH value among the three mines were observed. (3) The organic carbon content of D. dichotoma rhizosphere soil was significantly higher than that of non-rhizosphere soil. The contents of total nitrogen and ammonium nitrogen

nitrate nitrogen and pH value all had no significant differences; the soil nutrient content had no significant difference between L. formosana rhizosphere and non-rhizosphere.[Conclusions] Vegetation can improve soil

but the soil fertility restoration is a long-term process.

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