| 等高活篱笆技术提高坡地持续生产力探讨*—以三峡库区为例 |
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| 引用本文： | 李秀彬,彭业轩,姜臣,李顺彩.等高活篱笆技术提高坡地持续生产力探讨*—以三峡库区为例[J].地理研究,1998,17(3):309-315. |
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| 作者姓名： | 李秀彬 彭业轩 姜臣 李顺彩 |
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| 作者单位： | 1. 中国科学院地理研究所 北京 100101;2. 湖北省秭归县水土保持试验站 秭归 443600 |
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| 基金项目： | 国家自然科学基金，国家科技攻关项目，49231020，96-920-13-01，， |
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| 摘 要： | 控制坡面水土流失和土地退化,是坡地资源持续利用的关键,也是解决三峡库区移民安置的主要途径之一。在三峡库区所进行的等高活篱笆技术试验表明,这种技术对增加土壤有机质含量、延缓径流及控制土壤流失具有十分明显的作用。篱笆植物新银合欢、马桑和黄荆都是著名的绿肥植物,每年从活篱笆上修剪下的枝叶可分别为篱间地的土壤提供24000kg/hm2、8400kg/hm2和31500kg/hm2的绿肥。营养元素含量较高的新银合欢,每公顷所产绿肥含纯氮素924kg,磷48kg,钾504kg.在坡面上沿等高线种植的篱笆带密闭以后,可以起到削减径流量,延缓产流过程,增加土壤入渗,并可拦截径流中大部分的土粒。由于篱笆带阻挡了各种因素造成的土壤沿坡面下移,篱间地的坡度不断降低。这些对坡地持续生产力的提高都具有积极的意义。
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| 关 键 词： | 三峡库区 坡地 等高活篱笆技术 |
| 收稿时间： | 1997-10-09 |
| 修稿时间： | 1997年10月9日 |
THE CONTOUR HEDGEROW TECHNOLOGY IN ENHANCING SUSTAINABLE PRODUCTIVITY OF SLOPELANDS --A CASE STUDY OF THE THREE GORGES AREA |
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| LI Xiubin,Peng Yexuan,JIANG Chen,Li Shuncai.THE CONTOUR HEDGEROW TECHNOLOGY IN ENHANCING SUSTAINABLE PRODUCTIVITY OF SLOPELANDS --A CASE STUDY OF THE THREE GORGES AREA[J].Geographical Research,1998,17(3):309-315. |
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| Authors: | LI Xiubin Peng Yexuan JIANG Chen Li Shuncai |
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| Institution: | 1. Institute of Geography, Chinese Academy of Sciences, Beijing 100101;2. Zigui Experimental Station of Water & Soil Conservation, Zigui 443600 |
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| Abstract: | The construction of the Three Gorge Dam on the Yangzte River will put more pressure on the slopelands in the surrounding area. Sustainability of these lands depends on the successful control of soil and water erosion. A site experiment of the contour hedgerow technology in harnessing erosion and enhancing soil fertility has being carried out in the area since 1993. The initial results of the experiment show that the technology can decrease and slow down surface runoff greatly, reduce soil erosion enormously, and provide a large amount of green manure. Among the 12 species selected for the experiment, Leucaena leucacephala, Coriaria sinica, Vitex negundo, Hemerocallis citrina, Vetiveria zizanioides are well adaptable to the local environment and can be used as hedgerow plants. The first three species can be used as green manure plants. The everage biomass cut from the hedgerows of these plants each year amount to 24 000 kg/ha, 8 400 kg/ha and 31 500 kg/ha respectively. A simulated rainfall test shows that vitex hedgerow can decrease runoff by 70% and sediment over 99%. |
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| Keywords: | the Three Gorge Dam Reservoir sloping land contour hedgerow technology |
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