| 添加水对半干旱区沙质草地土壤氮有效性季节变化的影响(英文) |
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| 引用本文： | 黄晓星,于占源,钱伟,徐大勇,艾桂艳.添加水对半干旱区沙质草地土壤氮有效性季节变化的影响(英文)[J].林业研究,2007,18(4). |
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| 作者姓名： | 黄晓星 于占源 钱伟 徐大勇 艾桂艳 |
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| 作者单位： | 中科院沈阳应用生态研究所大青沟生态站，中科院沈阳应用生态研究所大青沟生态站，福建师范大学，同济大学环境科学与工程学院，中科院沈阳应用生态研究所大青沟生态站 沈阳 110016 中国科学院研究生院，北京 100039，沈阳 110016，福州 350007，上海200092，沈阳 110016 |
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| 基金项目： | Key Laboratory of Terrestrial Ecological Process and Regional Ecological Safety in Liaoning Province，中国科学院知识创新工程项目 |
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| 摘 要： | Water is usally thought of a limiting factor for the restoration of semi-arid ecosystem. In the growing season of 2006, a study was conducted to determine the effects of modeling precipitation on seasonal patterns in concentrations of soil-available nitrogen and to describe the seasonal patterns in soil nitrogen availability and seasonal variation in the rates of net nitrogen mineralization of topsoil at Daqinggou ecological station in Keerqin sand lands, Inner Mongolia Autonomous Region, China. Manipulation of water (80 mm) was designed to be added to experiment plots of sandy grasslands in dry season. Water addition (W) treatment and control (CK) treatment were separately taken in six replications and randomly assigned in 12 plots (4 m×4 m for each) with 2-m buffers betweens. Results showed that the content of soil inorganic nitrogen and net nitrogen mineralization rate were not affected by adding water in sandy grassland of Keerqin sand lands. Net nitrogen mineralization rates ranged from 0.5 μg·g-1·month-1 to 4 μg·g-1·month-1. The highest values of soil inorganic nitrogen and net nitrogen mineralization occurred on October 15 in control plots. The seasonal changes of soil inorganic nitrogen contents exhibited "V" shape pattern that was related to seasonal patterns of soil ammonium-N (ascending trend) and nitrate-N transformation (descending trend).
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| 关 键 词： | 氮矿化 矿质氮 草地 科尔沁沙地 硝化作用 |
Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region |
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| HUANG Xiao-xing,YU Zhan-yuan,QIAN Wei,XU Da-yong,AI Gui-yan.Effects of adding water on seasonal variation of soil nitrogen availability under sandy grasslands in semi-arid region[J].Journal of Forestry Research,2007,18(4). |
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| Authors: | HUANG Xiao-xing YU Zhan-yuan QIAN Wei XU Da-yong AI Gui-yan |
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| Abstract: | |
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| Keywords: | Nitrogen mineralization Inorganic nitrogen Grassland Keerqin sand lands Nitrification |
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