| 荒漠灌丛降雨再分配对土壤pH值的影响 |
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| 引用本文： | 张亚峰,王新平,虎 瑞,潘颜霞.荒漠灌丛降雨再分配对土壤pH值的影响[J].中国沙漠,2013,33(5):1400-1405. |
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| 作者姓名： | 张亚峰 王新平 虎 瑞 潘颜霞 |
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| 作者单位： | 1.中国科学院寒区旱区环境与工程研究所 沙坡头沙漠试验研究站, 甘肃 兰州 730000;
2.中国科学院大学, 北京 100049 |
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| 摘 要： | 对腾格里沙漠东南缘沙坡头地区1989年建植人工植被区优势固沙灌木柠条（Caragana korshinskii）和半灌木油蒿（Artemisia ordosica）树干茎流及穿透雨的pH值,以及灌丛基部、灌丛下和灌丛外裸地0～10 cm和10～20 cm剖面深度土壤pH值分别进行测定,并与大气降雨pH值进行比较,以探讨荒漠灌丛降雨再分配对土壤pH值空间变异的影响。结果表明:大气降雨pH值最高,穿透雨pH值次之,树干茎流pH值最低,三者之间具有显著差异（p<0.05）。灌丛外裸地土壤pH值最高,灌丛下次之,树干基部最低。总体而言,0～10 cm剖面深度土壤pH值小于其下方10～20 cm剖面深度土壤pH值。柠条灌丛产生的树干茎流对土壤的酸化作用强于油蒿灌丛。树干茎流和穿透雨的酸化作用是导致土壤pH值从灌丛间裸地到灌丛基部方向上降低的一个重要原因。
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| 关 键 词： | 树干茎流 穿透雨 大气降雨 pH值 土壤 柠条（Caragana korshinskii） 油蒿（Artemisia ordosica） |
| 收稿时间： | 2012-08-17 |
| 修稿时间： | 2012-08-28 |
Effects of Rainfall Redistribution Induced by Xerophytic Vegetation on Soil pH |
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| ZHANG Ya-feng,WANG Xin-ping,HU Rui,PAN Yan-xia.Effects of Rainfall Redistribution Induced by Xerophytic Vegetation on Soil pH[J].Journal of Desert Research,2013,33(5):1400-1405. |
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| Authors: | ZHANG Ya-feng WANG Xin-ping HU Rui PAN Yan-xia |
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| Institution: | 1.Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | We measured the pH of gross rainfall, stemflow and throughfall, and the pH of soils that are adjacent to the shrub base, beneath the canopy and in the intershrub spaces of two dominant desert shrubs (Caragana korshinskii and Artemisia ordosica), respectively, in the revegetation area established in 1989 of Shapotou area, at the southeastern edge of the Tengger Desert. The study aimed to examine the effects of rainfall redistribution induced by xerophytic vegetation on soil pH variations. Significant differences (p<0.05) in pH were found between stemflow, throughfall and gross rainfall, with the highest in the gross rainfall, followed by throughfall and stemflow. Soil pH in the intershrub spaces was the highest, followed by that beneath shrub canopy and that adjacent to the shrub base. Soil pH in the 0-10 cm soil profile generally had a lower value than in 10-20 cm soil profile. Soil acidification induced by stemflow of C. korshinskii was more intense than that of A. ordosica. Stemflow and throughfall acidification is considered as an important factor resulting in the decrease of soil pH in the direction from the inthershrub spaces to the shrub base. |
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| Keywords: | stemflow throughfall gross rainfall pH soil Caragana korshinskii Artemisia ordosica |
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