| 城乡交错带土地利用变化对土壤养分的影响--以北京市大兴区为例 |
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| 引用本文： | 孔祥斌,张凤荣,王茹,徐艳.城乡交错带土地利用变化对土壤养分的影响--以北京市大兴区为例[J].地理研究,2005,24(2):213-221. |
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| 作者姓名： | 孔祥斌 张凤荣 王茹 徐艳 |
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| 作者单位： | 中国农业大学土地资源与管理系,北京,100094;北京市房屋与土地管理局土地整理中心,北京,100009 |
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| 基金项目： | 国家重点基础研究发展规划项目(G1999011810)
国家自然科学基金(49871005)
国土资源部重点科技项目(2000209) |
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| 摘 要： | 以北京市大兴区为城乡交错带的分析样区,对1982年、2000年土地利用方式变化和两期不同土地利用方式的土壤养分变化情况进行分析。结果表明:与1982年相比,2000年土壤有机质含量在不同土地利用方式下增加的顺序为:果园>水浇地>稻田>菜地>林地>旱地; 土壤全氮含量增加的顺序为:稻田>菜地>水浇地>果园>旱地>林地;土壤碱解效氮含量增加的顺序为稻田>水浇地>菜地>果园>旱地>林地;土壤速效磷含量增加的顺序为果园>水浇地>稻田>旱地>菜地>林地;土壤速效钾含量在不同土地利用方式下变化规律为, 在果园和稻田中略有增加,在其他利用方式中有不同程度降低。水稻田转变为水浇地、菜地、果园后,土壤有机质、全氮、碱解氮含量增加幅度顺序为旱地>果园>水浇地>菜地;速效磷含量增加的顺序为果园>水浇地>菜地>旱地。旱地转变为果园、水浇地后,除速效钾含量降低外,其他养分含量都有不同程度的提高。沙荒地转变为旱地、水浇地、菜地、果园、林地后,除速效钾含量降低外,其他养分含量都有不同程度的增加。
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| 关 键 词： | 土地利用变化 土壤养分变化 不同时期 城乡交错带 大兴 北京 |
| 文章编号： | 1000-0585(2005)02-0213-09 |
| 收稿时间： | 2004-04-10 |
| 修稿时间： | 2004年4月10日 |
The impact of land use type changes on soil nutrinet in suburban area:the case of Daxing District in Beijing |
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| KONG Xiang-bin,ZHANG Feng-rong,WANG Ru,XU Yan.The impact of land use type changes on soil nutrinet in suburban area:the case of Daxing District in Beijing[J].Geographical Research,2005,24(2):213-221. |
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| Authors: | KONG Xiang-bin ZHANG Feng-rong WANG Ru XU Yan |
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| Institution: | 1. Dept. of Land Resources and Management, CAU, Beijing 100094, China;2. Beijing House and Land Management Bureau, Beijing 100009, China |
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| Abstract: | Land use changes can not only change land cover, but also influence a variety of natural phenomena and ecological processes, including soil conditions, water runoff, soil erosion and biodiversity. The rational land use can improve soil structure, strengthen resistance to the environmental change, and the irrational land use can lead to land degradation, such as water and soil loss, land desertification. Daxing District located to the south of Beijing, was taken as a case study for illustrating the effects of land use change on soil fertility. The 1:50,000 soil map produced in the Second National Soil Survey (SNSS) in 1982 was digitized with GIS supporting. Top soil samples were collected from the same soil sampling sites of the 1:50,000 soil map with GPS reference locations, from May to June 2000. Three samples collected around each sampling point were mixed and a quarter of each sample was kept for laboratory analysis. At the same time, farmers were interviewed for fertilizer input, irrigation, yield, land management, etc. The soil samples were air-dried and ground to pass 0. 15 to 1 mm sieves in the laboratory. Chemical properties of soils were analyzed using standard methods. The content of organic matter, total N, available N and available P increased by 31. 02%,50%, 37.89% and 177% respectively, but that of available K decreased at the same time. The order of content changes of organic matter, total N and, available P is different between different land use types in 1982 and 2000, which is horticulture land> water land>irrigable land>vegetable land>dryland>forest land. Due to the transition of water land into irrigable land, vegetable land and horticulture land, the order of changes of organic matter, total N and available N is dryland> horticulture land> irrigable land> vegetable land, the order of the available P is horticulture land>irrigable land> vegetable land >dryland, the available P increased in horticulture land and dryland, but decreased in vegetable land and irrigable land to some extent. The order of organic matter and the available P is horticulture land> irrigable land> dryland, that of total N is dryland> horticulture land>irrigable land, and the available N is irrigable land > horticulture land > dryland, with the dryland transiting into irrigable land and horticulture land. The extent of the available K decreased, but the other nutrients of soil increased at the same time when sandy wasteland were transited into such land types as irrigable land, horticulture land, dryland, forest land and vegetable land. |
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| Keywords: | land use type soil nutrient temporal change different times suburban area Beijing |
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