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| 基于可拓工程方法的鄱阳湖区农地生态退化评价 | |
| 引用本文： | 艾亮辉,吴次芳,陈美球,徐保根. 基于可拓工程方法的鄱阳湖区农地生态退化评价[J]. 自然资源学报, 2003, 18(3): 333-339. DOI: 10.11849/zrzyxb.2003.03.011 |
| 作者姓名： | 艾亮辉 吴次芳 陈美球 徐保根 |
| 作者单位： | 1. 浙江大学东南土地管理学院, 浙江杭州 310029; 2. 江西农业大学国土学院, 江西南昌 330045 |
| 基金项目： | 国家自然科学基金项目(30060020，70273069)。 |
| 摘 要： | 生态退化是鄱阳湖区农地生产效率低下和农民贫困的主要原因。研究湖区农地生态退化程度和分布规律,是进行湖区农地生态恢复和重建的前提和基础。论文通过选取具有湖区典型特征的研究区域,应用可拓工程方法进行农地生态退化评价研究。结果表明,湖区生态退化的农地占农地总面积的40%左右,主要分布在湖区水面沿线和低山、丘陵地带。森林植被衰退、过度垦殖、围湖造地、农地基础设施投入不足是湖区农地生态退化的主要原因。植树造林、退耕还林还湖、保护湿地、增加基础设施投入是湖区农地生态恢复和重建的主要途径。 |
| 关 键 词： | 生态退化 可拓工程方法 农用土地 鄱阳湖 |
| 文章编号： | 1000-3037(2003)03-0333-07 |
| 收稿时间： | 2002-12-02 |
| 修稿时间： | 2002-12-02 |
The evaluation of degradation of farmland eco-system of Poyang Lake zone based on extension engineering method |
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| AI Liang-hui,WU Ci-fang,CHEN Mei-qiu,XU Bao-geng. The evaluation of degradation of farmland eco-system of Poyang Lake zone based on extension engineering method[J]. Journal of Natural Resources, 2003, 18(3): 333-339. DOI: 10.11849/zrzyxb.2003.03.011 | |
| Authors: | AI Liang-hui WU Ci-fang CHEN Mei-qiu XU Bao-geng |
| Affiliation: | 1. Southeast Land Management College, Zhejiang University, Hangzhou 310029, China; 2. Land Resource&Environment College, Jiangxi Agricultural University, Nanchang 330045, China |
| Abstract: | The degradation of farmland eco-system is the main reason for low agricultural pro-ductivity and poverty of the local farmers.The object of this research aims at finding out the de-gree and distribution law of farmland ecological degradation,which is the foundation and prereq-uisite for the restoration and rehabilitation of farmland eco-system,and also is the important means of improving the productivity of farmland and alleviating the poverty of farmers of the Poyang Lake zone. With the method of the extension engineering,this paper evaluates the farmland eco-system of the selected area which is typically characteristic of the Poyang Lake zone.The result of evalu-ation shows that the degradation of farmland eco-system in the selected area is extremely seri-ous,the degraded land area covers16633.85hm 2 ,which accounts for39.96%of the total se-lected farmland.Based on the mapping of the evaluated result,it clearly displays that the de-graded farmland is mainly distributed along the Poyang Lake and in low hilly area.According to the result of evaluation,this paper analyzes the mechanism of the degradation,and explains its current status and evolving law of farmland ecological degradation.The degrada-tion of farmland eco-system is mainly due to constant decline of vegetation cover rate,which lead to water and soil loss.Inappropriate human activ ities such as excessive exploitation of land re-sources and deficient infrastructural investment,to a certain extent,inevitably result in the degradation of the farmland ecosystem.At the end,this paper puts forward three main measures to restore and reconstruct the de-graded farmland eco-system in Poyang Lake zone,that is improving the vegetation cover rate,restoring woodland and wetland from cropland and increasing the agricultural infrastructure in-put. |
| Keywords: | ecological degradation extension engineering method farmland Poyang Lake |
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