论文部分内容阅读
土壤质量研究对于区域土地可持续利用及当地环境维护具有重要价值。以处于极端干旱背景下的塔里木盆地南缘策勒绿洲为研究区,以农田这一重要的土地利用类型为研究对象,探讨在绿洲化进程中不同农田利用强度对绿洲荒漠土壤的影响。2004年根据当地农民耕作习惯建立4块试验农田,分别代表当地典型的农田利用强度。通过土壤粒径分布分形特征,及基于土壤养分指标的土壤质量指数(SQI)、基于生产力数据的产量可持续性指数(SYI)分析,多角度探讨农田在不同利用强度下的土壤质量分异特征。研究表明农田位置与人为管理强度会对土壤质量产生重要影响,在绿洲边缘对农田开发利用应当采取谨慎的态度及合理的管理方式。研究在客观分析并揭示绿洲化进程中农田土壤质量分异的同时,也为绿洲农田可持续利用管理提供科学建议。
Soil quality research is of great value to the sustainable use of regional land and the maintenance of local environment. Taking Cele Oasis in the southern margin of Tarim Basin under the extreme drought as the research area, this important land use type of farmland was taken as the research object to discuss the influence of different farmland utilization intensity on oasis desert soil during the process of oasis. In 2004, four experimental farmlands were set up based on the farming habits of local farmers, representing the intensity of typical farmland utilization in each locality. Based on the fractal characteristics of soil particle size distribution, soil quality index (SQI) based on soil nutrient index and yield sustainability index (SYI) based on productivity data, the characteristics of soil quality under different utilization intensity . Studies have shown that farmland location and man-made management intensity will have a significant impact on soil quality. At the edge of oasis, the development and utilization of farmland should adopt a cautious attitude and a reasonable management approach. The study also provides scientific advice for the management of sustainable use of oasis farmland while objectively analyzing and revealing the farmland soil quality differentiation in the process of oasis.