| 黄土退耕坡地植物根系分布特征及其对土壤养分的影响 |
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| 引用本文： | 韩凤朋,郑纪勇,张兴昌.黄土退耕坡地植物根系分布特征及其对土壤养分的影响[J].农业工程学报,2009,25(2):50-55. |
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| 作者姓名： | 韩凤朋 郑纪勇 张兴昌 |
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| 作者单位： | 1. 西北农林科技大学、中国科学院水土保持与生态环境研究中心黄十高原土壤侵蚀与旱地农业国家重点实验室,杨凌,712100;中国科学院研究生院,北京,100039
2. 西北农林科技大学、中国科学院水土保持与生态环境研究中心黄十高原土壤侵蚀与旱地农业国家重点实验室,杨凌,712100;西北农林科技大学资源与环境学院,杨凌,712100 |
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| 基金项目： | 国家科技支撑计划（2006BAD06）；教育部长江学者与创新团队计划(0749)；西部之光项目（2006YB04） |
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| 摘 要： | 为明确黄土退耕坡地植物根系分布特征及其对土壤养分的影响，在陕西神木六道沟流域选取退耕30 a的长芒草坡地和裸地坡面，利用图像处理和常规分析方法研究了长芒草根系和土壤养分在土壤剖面分布及其相互关系。结果表明：长芒草根系主要分布在0～50 cm土层，分布规律可用指数函数来模拟。有根系存在的土壤表层有机质、全氮、全磷、硝态氮和铵态氮含量均高于无根系存在的坡面。在有根系存在时土壤有机质、全氮和硝态氮的具有明显的表聚现象。0～ 50 cm有机质、全氮、硝态氮和铵态氮随深度的变化可用幂函数来表示，而全磷随深度呈线性相关。0～50 cm的土壤养分与根长密度的关系可以用线性函数来表示。其研究结果为坡面退耕地土壤管理提供科学依据。
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| 关 键 词： | 土壤侵蚀 退耕坡地 根系分布 土壤养分 |
| 收稿时间： | 2007/8/13 0:00:00 |
| 修稿时间： | 2008/11/13 0:00:00 |
Plant root system distribution and its effect on soil nutrient on slope land converted from farmland in the Loess Plateau |
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| Han Fengpeng,Zheng Jiyong and Zhang Xingchang.Plant root system distribution and its effect on soil nutrient on slope land converted from farmland in the Loess Plateau[J].Transactions of the Chinese Society of Agricultural Engineering,2009,25(2):50-55. |
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| Authors: | Han Fengpeng Zheng Jiyong and Zhang Xingchang |
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| Institution: | 1.State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau;Institute of Soil and Water Conservation;Chinese Academy of Sciences and Northwest Sci-tech University of Agriculture and Forestry;Yangling 712100;China;2.Graduate School of Chinese Academy of Sciences;Beijing 100039;3.College of Resources and Environment;Northwest Sci-tech University of Agriculture and Forestry;China |
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| Abstract: | In order to understand the root system distribution of Stipa bungeana in the soil profile and its influence on soil nutrients,two slopes were studied.One is a slope with 30 years growth of Stipa bungeana and the other is a bare slope land.They are all located in Shenmu experiment station of the Loess Plateau.The soil nutrients and root distribution in the soil profile were studied using picture management software and general analysis method.The results show that the root of Stipa bungeana mainly distribute... |
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| Keywords: | soil erosion slope land converted from farmland root distribution soil nutrients |
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