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岩溶区不同植被演替过程中土壤元素及其有效态
引用本文:周晓东,邓艳.岩溶区不同植被演替过程中土壤元素及其有效态[J].水土保持通报,2017,37(5):40-45.
作者姓名:周晓东  邓艳
作者单位:中国地质科学院岩溶地质研究所,国土资源部岩溶生态系统与石漠化治理重点实验室,广西桂林541004
基金项目:国家重点研发计划课题“断陷盆地石漠化综合治理模式与技术集成”(2016YFC0502506);中央级公益性科研院所基本科研业务费专项资金“西南典型岩溶关键带生态格局/过程对表层岩溶水的响应”(YWF201401)
摘    要:目的]探讨岩溶区不同植被演替过程中土壤元素及其有效态变化规律,为岩溶区石漠化治理提供依据。方法]采用空间代替时间序列的方法,选取立地条件相似的草地、灌草丛、灌丛、乔幼林和顶级乔林5个植被恢复阶段进行分析。结果]同一植被类型条件下有机质的含量浅层大于深层;元素的迁移能力在垂向上:在植被演替的早期阶段浅层大于深层,后期深层土大于浅层;在横向上:乔幼林顶级乔林灌草丛草地灌丛;随着植被的演替土壤中有机质呈波浪式的增加,并在顶级乔林阶段达到最大值;土壤有机质含量与Mn,Zn,Cu元素有效态含量呈明显的正相关。受此影响,浅层土壤元素态有效率明显高于深层土壤。结论]石漠化治理过程中应针对石漠化地区土层厚度、地形、土壤元素分布特征,选择合理的植被进行恢复。

关 键 词:植被类型  植被演替  元素迁移  土壤有机质  分布特征
收稿时间:2017/2/17 0:00:00
修稿时间:2017/3/4 0:00:00

Soil Elements Level and Availability in Different Vegetation Succession Stages in Karst Area
ZHOU Xiaodong and DENG Yan.Soil Elements Level and Availability in Different Vegetation Succession Stages in Karst Area[J].Bulletin of Soil and Water Conservation,2017,37(5):40-45.
Authors:ZHOU Xiaodong and DENG Yan
Institution:Institute of Karst Geology, Chinese Academy of Geological Sciences, Key Laboratory of Karst Ecosystem and Rocky Desertification Treatment, Ministry of Land and Resources, Guilin, Guangxi 541004, China and Institute of Karst Geology, Chinese Academy of Geological Sciences, Key Laboratory of Karst Ecosystem and Rocky Desertification Treatment, Ministry of Land and Resources, Guilin, Guangxi 541004, China
Abstract:Objective] To explore the variations of soil elements and their availabilities in different vegetation successional stages in karst region in order to provide a certain basis for the treatment of rocky desertification.Methods] Method of investigation in different spatial sites instead of time-series sampling was used. Sites at five different vegetation stages as grass, grass-shrub, shrub, earlier arbor, arbor climax with the same geological backgrounds were investigated and sampled.Results] The organic matter contents of five vegetation types in shallow soil are all higher than that in deep soil. The elements migration in the vertical direction showed that in shallow soil horizons are all higher than that in deep soil horizons at the early vegetation successional stage and indicate the opposite trend at the late stage. Meanwhile, the elements migration in the horizontal direction indicate the order of earlier arbor stage, climax arbor stage, grass-shrub stage, grass stage, and shrub stage. The soil organic matter showed wavy increase with the vegetation succession and reached the maximum value at climax arbor stage. The availabilities of Mn, Zn, Cu had positive correlations with soil organic matter. Therefore, the soil elements availabilities in shallow soil were higher than that in deep soil.Conclusion] To deal with the rocky desertification, items of soil thickness, topography and soil element distribution characteristics should be concerned to select reasonable revegetation measures.
Keywords:vegetation types  vegetation succession  element migration  soil organic matter  distribution
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