| 两种立地条件梯田埂坎红柳根系特征研究 |
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| 引用本文： | 张宇清,齐实,孙立达,邹青,孙秀云.两种立地条件梯田埂坎红柳根系特征研究[J].北京林业大学学报,2002,24(2):44-47. |
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| 作者姓名： | 张宇清 齐实 孙立达 邹青 孙秀云 |
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| 作者单位： | 1. 北京林业大学资源与环境学院;2. 西北农林科技大学 |
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| 基金项目： | 国家科技攻关项目;96-004-05-10; |
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| 摘 要： | 我国黄土高原为治理水土流失、改善农业生态环境修建了大面积的梯田.坡改梯后,梯田埂坎占很大比重,在裸露的梯田埂坎配置埂坎林具有重要意义.该文介绍了梯田埂坎林的研究状况,运用三维坐标根系全部挖掘法和3D数据图像处理技术,对黄土丘陵区阳坡和阴坡下部两种立地条件埂坎红柳根系进行了研究.研究结果认为,两种立地条件下的埂坎红柳都具有深根性的特点,但阴坡埂坎红柳根系的水平分布范围远大于阳坡,吸收根所占比重较大,根系的生长发育状况明显优于阳坡,造成对梯田作物的较大负面影响,建议最好将红柳配置在阳坡梯田埂坎上.
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| 关 键 词： | 埂坎林 埂坎红柳 根系分布 根型 |
Root system characteristics of Tamarix ramosissima Ldb. on terrace embankments in two types of stand conditions |
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| Zhang Yuqing, Qi Shi, Sun Lida, Zou Qing, Sun Xiuyun. College of Resources and Environment,Beijing For. Univ.,P. R. China..Root system characteristics of Tamarix ramosissima Ldb. on terrace embankments in two types of stand conditions[J].Journal of Beijing Forestry University,2002,24(2):44-47. |
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| Authors: | Zhang Yuqing Qi Shi Sun Lida Zou Qing Sun Xiuyun College of Resources and Environment Beijing For Univ P R China |
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| Institution: | Zhang Yuqing, Qi Shi, Sun Lida, Zou Qing, Sun Xiuyun. College of Resources and Environment,Beijing For. Univ.,100083,P. R. China. |
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| Abstract: | For combating soil and water loss and improving agricultural bio environment, a large scale terraces have been built in the loess plateau in China. After the slopes having been turned into terraces, there are a lot of embankments. It is very important to dispose forests on the uncovered embankments. In this paper, the authors briefly introduce the situation of studies on forests on the embankments and researches the root systems of Tamarix ramosissima Ldb. on terrace embankments in two types of stand conditions including southward and northward slopes in loess hilly country using the method of 3D coordinate excavating total root systems and the technique of data image process. The results indicate that the Tamarix ramosissima Ldb. on terrace embankments in two types of stand conditions have deeper root systems, and moreover Tamarix ramosissima Ldb.on the northward slopes has a wider horizontal distribution range and bigger ratio of fine roots than those on the southward slopes. The root systems on the northward slopes are obviously superior to those on the southward. It is inevitable that Tamarix ramosissima Ldb. on the embankments of northward slopes will bring negative effects on crops growing in the terraces. The authors suggest that it is better to plant Tamarix ramosissima Ldb. on the embankments of southward slopes. |
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| Keywords: | forest on embankment Tamarix ramosissima Ldb root system distribution root architecture |
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