Impact of land use changes on soil carbon, nitrogen and phosphorus and water pollution in an arid region of northwest China
文献类型：期刊论文
| 作者 | Wang, GX; Ma, HY; Qian, J; Chang, J |
| 刊名 | SOIL USE AND MANAGEMENT
 |
| 出版日期 | 2004-03-01 |
| 卷号 | 20期号:1页码:32-39 |
| 关键词 | arid zone inland river basin land use soil nutrient organic carbon water environment |
| ISSN号 | 0266-0032 |
| DOI | 10.1079/SUM2003220 |
| 通讯作者 | Wang, GX(gxwang@ns.lzb.ac.cn) |
| 英文摘要 | Physical, chemical and environmental consequences of land use change from cultivated land to desert grassland and vice-versa were monitored in the middle reaches of the Heihe River basin, which is one of the largest inland basins of and northwest China. Levels of N and P in soils and surface waters and soil organic carbon were measured. After the first 3-5 years of cultivation the N and P contents of various former grassland soils, including mountain-meadow and plains-meadow grasslands, decreased significantly. After some 13 years of cultivation, soil nutrient content in former mountain meadow grasslands gradually stabilized, whereas those of desertified grassland, where cultivation had simply been abandoned, showed a notable decrease. Under these latter conditions, soil N and P were lost at a rate of 276 kg ha(-1) and 360 kg ha(-1), respectively, over the 13-year period. The transformation of grassland into cultivated land and that of cultivated land into desert grassland resulted in organic carbon emissions of 1.68 TgC and 0.55 TgC, respectively, over 13 years. Land use changes in the and inland region clearly have a significant influence on the soil organic carbon pool and carbon cycle. Falls in soil N and P led to 63% and 34% mean enrichment of N and P, respectively, in downstream waters, thus posing a future environmental problem for the and region of northwest China. |
| 收录类别 | SCI |
| WOS研究方向 | Agriculture |
| WOS类目 | Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000221299100006 |
| 出版者 | C A B I PUBLISHING |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555603 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wang, GX |
| 作者单位 | 1.Lanzhou Univ, MOE Natl Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, GX,Ma, HY,Qian, J,et al. Impact of land use changes on soil carbon, nitrogen and phosphorus and water pollution in an arid region of northwest China[J]. SOIL USE AND MANAGEMENT,2004,20(1):32-39. |
| APA | Wang, GX,Ma, HY,Qian, J,&Chang, J.(2004).Impact of land use changes on soil carbon, nitrogen and phosphorus and water pollution in an arid region of northwest China.SOIL USE AND MANAGEMENT,20(1),32-39. |
| MLA | Wang, GX,et al."Impact of land use changes on soil carbon, nitrogen and phosphorus and water pollution in an arid region of northwest China".SOIL USE AND MANAGEMENT 20.1(2004):32-39. |
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来源：寒区旱区环境与工程研究所
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