三工河流域土地开发利用中的无机碳汇强度模拟
文献类型：学位论文
| 作者 | 邓彩云 |
| 答辩日期 | 2017-05-01 |
| 文献子类 | 硕士 |
| 授予单位 | 中国科学院大学 |
| 授予地点 | 新疆乌鲁木齐 |
| 导师 | 王玉刚 |
| 关键词 | 土地开发利用 灌溉淋溶 无机碳汇强度 节水灌溉措施 影响要素 Land reclamation and land use Irrigation leaching Irrigation carbon sink intens ity Drip irrigation policy Influence elements |
| 学位专业 | 理学硕士 |
| 英文摘要 | The role of terrestrial ecosystems as sources and sinks of C has played a crucial function on the global climate. Changes in land use are among the main human activities affecting the ecosystem carbon cycle. Obviously, it is essential to understand human activities affecting the carbon source and sink to release the increasing of temperature in relation to the global climate change. Accurately quantitative estimation of regional inorganic carbon sink is one of main topic in studies of global carbon cycle. Soil inorganic carbon is increasingly significant contribution to global carbon cycle. Now and next long time, it seeks carbon accumulation in the process of water cycle as one part of ―missing sink‖. But, inorganic carbon sink as dissolved part is a long-been-neglected phenomenon of the transfer and sequestration of dissolved inorganic carbon in the process of oasis development because of specific water resource consumption of inland river in arid zone.This study was conducted to quantify the contribution of land use in arid areas to regional carbon cycle in a typical inland river watershed, named Sangong River watershed in arid of the northwest of China, based on the data of simulated irrigation of soil columns and collected leaching solutions at irrigated landscapes in the process of land reclamation and utilization in the study area. Furthermore, land use change and amount of water consumed in irrigated landscape types were analyzed based on data from remote sensing image, land use, and water resources combined with field investigation. The results showed the following: (1). Oasis agricultural landscape, especially farmland dominates the region of Sangong River watershed, exploitation of land resources in area of becoming irrigated farmland expanded was from upper to lower of the watershed, and from middle to around of it. Land-use change was mainly characterized by the increasing multiplicity and fragmentation from 1958 to 2015. There have been persistent changes both spatially and temporally, resulting in 55% of the total area experiencing transitional changes among the land cover types. The general trend observed in the study area implied a loss of grassland and shrub land cover and an increase in cultivated areas. Land exploitation as socioeconomic processes are the major divers for land-use change.(2) The values of leaching inorganic carbon content and sink intensity were significantly difference under various cropland types in changes of irrigated condition. In flood irrigated condition, dissolved inorganic carbon content: planted forest < vegetable land< corn land< melon land < sunflower land < cotton land< wheat land< rice land< oil plant land；the values of leaching inorganic carbon sink intensity for various cropland types:cotton land (22 g C m-2yr-1) > corn land (19 g C m-2yr-1) , orchard land (18 g C m-2yr-1),forest nurseries land (17 g C m-2yr-1), winter wheat land (17 g C m-2yr-1), > melon land (13g C m-2yr-1) > planted forest belt land (10 g C m-2yr-1) , rice land 10 g C m-2yr-1) > oil plant land (5 g C m-2yr-1). In drip irrigated condition, dissolved inorganic carbon content:vegetable land < corn land< melon land< planted forest < sunflower land< cotton land |
| 学科主题 | 生态学 |
| 语种 | 中文 |
| 源URL | [http://ir.xjlas.org/handle/365004/14866]  |
| 专题 | 新疆生态与地理研究所_研究系统_荒漠环境研究室 |
| 作者单位 | 中国科学院新疆生态与地理研究所 |
| 推荐引用方式 GB/T 7714 | 邓彩云. 三工河流域土地开发利用中的无机碳汇强度模拟[D]. 新疆乌鲁木齐. 中国科学院大学. 2017. |
入库方式： OAI收割
来源：新疆生态与地理研究所
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