[1]钟荣华,鲍玉海,贺秀斌,等.三峡库区消落带几种草地根系分布及土壤养分变化[J].水土保持研究,2015,22(02):151-157.
　ZHONG Ronghua,BAO Yuhai,HE Xiubin,et al.Root Distributions of Several Grasslands and Soil Nutrient Variation in the Riparian Zone of Three Gorges Reservoir[J].Research of Soil and Water Conservation,2015,22(02):151-157.
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三峡库区消落带几种草地根系分布及土壤养分变化

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 22 期数: 2015年02期 页码: 151-157 栏目: 出版日期: 2015-04-28
Title:
Root Distributions of Several Grasslands and Soil Nutrient Variation in the Riparian Zone of Three Gorges Reservoir
作者:
钟荣华1,2, 鲍玉海1, 贺秀斌1, 高进长1,2, 阎丹丹1,2
1. 中国科学院 成都山地灾害与环境研究所 山地表生过程与生态调控重点实验室, 成都 610041;
2. 中国科学院大学, 北京 10004
Author(s):
ZHONG Ronghua1,2, BAO Yuhai1, HE Xiubin1, GAO Jinzhang1,2, YAN Dandan1,2
1. Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
根系分布; 土壤养分; 植被恢复; 三峡水库; 消落带
Keywords:
root distribution; soil nutrient; revegetation; riparian zone; Three Gorges Reservoir
分类号:
S152.7
摘要:
为明确三峡水库消落带典型草本植物根系分布及土壤养分的变化，在三峡腹地忠县石宝镇消落带选取牛鞭草（Hemarthria altissima）、扁穗牛鞭草（Hemarthria compressa）、双穗雀稗（Paspalum paspaeoides）和自然恢复草地，利用WinRhizo Pro.2009 c根系分析系统和常规统计方法对比研究了4种典型草地植物根系在土壤剖面分布及其对土壤剖面养分的影响。结果表明：四种草地的根系大部分都分布在0—5 cm土层中，根长密度（Root length density，RLD）、根面积比（Root area ratio，RAR）均沿土壤深度程幂函数递减分布。植被及其根系的存在对土壤养分的剖面分布有重要影响。裸地的土壤有机碳（Soil organic carbon，SOC）和总N含量要显著低于草地，扁穗牛鞭草和自然恢复杂草地的全量养分大都要高于其他草地。四种草地类型的RLD，RAR与SOC、总N含量均有显著（p < 0.05）或极显著（p < 0.01）相关。可见本研究涉及几种植物的根系对土壤养分分布有重要影响。研究结果可以为三峡水库消落带植被恢复和水土保持提供一定的依据。
Abstract:
To understand the root distribution in the soil profile and its influence on soil nutrients, roots of Hemarthria altissima, Hemarthria compressa, Paspalum paspaeoides and natural recovery grass and soils from these grasslands were investigated in the riparian zone of Three Gorges Reservoir. Root analysis systems (WinRHIZO Pro. 2009c) was used to characterize the root systems and conventional statistical analysis methods were used to describe root distributions in soil profiles and their relationship with soil nutrients. The results showed that roots mainly distributing in 0—5 cm soil layer, root length density (RLD) and root area ratio (RAR) decreased as the power law function with soil depth. The plant and root systems have significant impact on the distributions of soil nutrients in soil profiles. Soil organic carbon (SOC) and total N content in the bare land were significantly lower than those in the grasslands. Total nutrients in H.compressa land and natural recovery land were higher than those in the other grasslands. The RLD and RAR were significantly correlated with SOC and total N content in four studied grasslands.

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备注/Memo

收稿日期:2014-08-29;改回日期:2014-11-23。
基金项目:中国科学院西部行动计划项目（KZCX2XB309-02）；国家自然科学青年基金（41201272）；国家科技支撑计划（2011BAD31B03）；中国科学院西部之光人才培养计划一般项目
作者简介:钟荣华(1987-),男,江西瑞金人,在读博士,主要从事消落带土壤侵蚀与水土保持研究。E-mail:zhrhua1987@163.com
通讯作者:贺秀斌(1967-),男,陕西镇安人,博士,研究员,主要从事土壤侵蚀与水土保持研究。E-mail:xiubinh@imde.ac.cn

更新日期/Last Update: 1900-01-01