| 灌丛对沙质草地土壤结皮形成发育的影响及其作用机制 |
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| 引用本文： | 赵哈林,郭轶瑞,周瑞莲.灌丛对沙质草地土壤结皮形成发育的影响及其作用机制[J].中国沙漠,2011,31(5):1105-1111. |
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| 作者姓名： | 赵哈林 郭轶瑞 周瑞莲 |
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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,甘肃兰州,730000
2. 鲁东大学生命科学学院,山东烟台,264025 |
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| 基金项目： | 国家十二五科技支撑项目(2011BA07B02); 国家自然科学基金项目(30972422)资助 |
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| 摘 要： | 为了了解灌丛对沙地土壤结皮的影响及其作用机制, 2006—2007年在科尔沁沙地调查了灌丛群落土壤结皮的发育特征, 并进行了田间模拟降尘、添加凋落物和结皮生物接种的试验。结果如下:①大气降尘、凋落物和微生物接种均可明显促进沙地土壤结皮的形成;②湿润、遮荫环境要比干旱、光照环境更有利于沙地土壤结皮的形成,但土壤结皮形成和发育对水分的敏感程度要大于对光照的敏感程度;③灌丛的存在对于流动沙地土壤结皮的形成发育具有明显的促进作用,沙地栽植灌木后通常会产生肥岛效应,在冠层下逐步形成结皮,并由灌丛内向外扩散;④灌丛促进沙地土壤结皮发育的主要机制是灌丛具有降风滞尘、拦截凋落物、遮荫保湿的功能,能使土壤黏粉粒、有机质、土壤养分和水分含量明显增加,为结皮的形成发育创造了良好物质条件和环境条件。
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| 关 键 词： | 沙地 灌丛 土壤结皮 影响 机制 |
| 收稿时间： | 2010-9-4 |
| 修稿时间： | 2010-11-16 |
Effects of Shrub on Development of Soil Crust and Its Mechanism in Sandy Grassland |
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| ZHAO Ha-lin,GUO Yi-rui,ZHOU Rui-lian.Effects of Shrub on Development of Soil Crust and Its Mechanism in Sandy Grassland[J].Journal of Desert Research,2011,31(5):1105-1111. |
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| Authors: | ZHAO Ha-lin GUO Yi-rui ZHOU Rui-lian |
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| Institution: | ZHAO Ha-lin1,GUO Yi-rui1,ZHOU Rui-lian2(1.Cold and Arid Regions Environment and Engineering Institute,Chinese Academy of Sciences,Lanzhou 730000,China,2.Faculty of Life Sciences,Ludong University,Yantai 264025,Shandong,China) |
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| Abstract: | Planting shrubs is a common measure to control mobile sand in semi-arid area.In order to understand effects of shrubs on development of soil crusts and its mechanism,an investigation on development properties of soil crusts outside and inside shrub communities and a field experiment on effects of falling dust,adding litter,and inoculating bio-crust were conducted in 2006-2007 in Horqin Sandy Land.Results show that 1) falling dust and adding litter and inoculating bio-crust can obviously promote formation an... |
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| Keywords: | sandy land shrub soil crust effects mechanism |
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