自然资源学报

自然资源学报 ›› 2007, Vol. 22 ›› Issue (1): 20-27.doi: 10.11849/zrzyxb.2007.01.003

• 资源管理 • 上一篇    下一篇

不同植被恢复模式对黄土丘陵区侵蚀土壤微生物量的影响

薛萐1,3, 刘国彬1, 戴全厚1,2, 党小虎1,3, 周萍1,3   

  1. 1. 中国科学院、水利部水土保持研究所, 西北农林科技大学, 陕西杨凌 712100;
    2. 贵州大学林学院, 贵阳 550025;
    3. 中国科学院研究生院, 北京 100049
  • 收稿日期:2006-05-23 修回日期:2006-10-10 出版日期:2007-02-25 发布日期:2007-02-25
  • 作者简介:薛萐(1978-),男,汉族,陕西西安人,博士研究生,主要从事微生物生态与恢复生态学方面研究。 E-mail:xuesha100@163.com
  • 基金资助:

    国家自然科学基金重点项目“黄土高原生态恢复的环境效应及评价(”90502007);国家重点基础研究发展计划“中国主要水蚀区土壤侵蚀过程与调控研究”(2007CB407205);中科院重大项目“黄土高原水土保持与可持续生态建设试验示范研究”

Effect of Different Vegetation Restoration Models on Soil Microbial Biomass in Eroded Hilly Loess Plateau

XUE Sha1,3, LIU Guo-bin1, DAI Quan-hou1,2, DANG Xiao-hu1,3, ZHOU Ping1,3   

  1. 1. Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources/NW Sci-TechUniv.of Agr.And For., Yangling 712100, China] ;
    2. College of Forestry, Guizhou University, Guiyang 550025, China;
    3. Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2006-05-23 Revised:2006-10-10 Online:2007-02-25 Published:2007-02-25

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125 | 44

摘要： 为了解侵蚀环境下植被恢复对土壤微生物量的影响,以典型侵蚀环境黄土丘陵区纸坊沟流域生态恢复30年植被长期定位试验点为研究对象,选取坡耕地为参照,分析了植被恢复过程中土壤微生物量、呼吸强度、代谢熵及理化性质的演变特征。结果表明,侵蚀环境下植被恢复后土壤微生物量碳、氮、磷显著增加,增幅分别为109.01%～144.22%、34.17%～117.09%和31.79%～79.94%,微生物呼吸强度增加26.78%～87.59%,代谢熵降低57.45%～77.49%,微生物量的增大和活性增强进一步促进了土壤性状的改善。相关性分析结果显示微生物量碳、磷、呼吸强度与土壤养分相关性极为密切,显然,土壤微生物量可以作为评价土壤质量的生物学指标。不同植被恢复模式对土壤质量改善作用不同,总体来说混交林作用效果最好,刺槐和柠条纯林次之,荒草地和油松纯林较差,在人工促进生态恢复过程中应持以混交林为主,纯林为辅的原则。

关键词: 土壤质量, 侵蚀环境, 植被恢复, 微生物量

Abstract: Vegetations recovery is a key measure to improve eco-environments in the Chinese Loess Plateau.In order to find the effect of soil microbial biomass under different vegetation restoration in this region,six long trial sites located in Zhifanggou Catchment were studied.The results showed that soil microbial biomass,microbial respiration and physiochemical properties increased apparently.After 30 years of de-farming and vegetation recovery,soil microbial biomass C,N,P(SMBC,SMBN,SMBP)and microbial respiration,respectively,increased by 109.01%-144.22%,34.17%-117.09%,31.79%-79.94% and 26.78%-87.59% as compared to the farmland.However metabolic quotient declined dramatically with a percentage decrease of 57.45%-77.49%.Different types of vegetation restoration are differentin improving soil properties.In general,mixed stands of P.tabulaeformis-Amorpha fruticosa and R.pseudoacacia-A.fruticosa had the most remarkable effect,followed by Robinia pseudoacacia and Caragana korshinkii,while fallow land and Pinus tabulaeformis was the smallest.Construction of mixed forest is more effective than that of pure forest in restoring vegetations on the eroded hilly Loess Plateau.The significant relationships were observed between SMBC,SMBP,microbial respiration and physiochemical properties of soil.We think that microbial biomass can be used as indicators of soil quality.

Key words: eroded hilly Loess Plateau, vegetations recovery, soil microbial biomass, soil quality

中图分类号: 

  • S154.36