ZHAO Xiangliang,FAN Yanmin,MA Na,et al.Remote Sensing Inversion of Characteristics and Influencing Factors of Soil Salinization Changes in Jimsar County[J].HEILONGJIANG AGRICULTURAL SCIENCES,2025,(08):28-39.[doi:10.11942/j.issn1002-2767.2025.08.0028]
遥感反演吉木萨尔县土壤盐渍化变化特征及影响因素
- Title:
- Remote Sensing Inversion of Characteristics and Influencing Factors of Soil Salinization Changes in Jimsar County
- 文章编号:
- 5
- Keywords:
- soil salinization; remote sensing inversion; temporal and spatial variation; MGWR; influencing factors
- 文献标志码:
- A
- 摘要:
- 为系统分析新疆吉木萨尔县2010-2023年的土壤盐渍化变化特征及影响因素，对比了基于RF、CART和PLS模型的遥感反演法的预测性能，以最优的方法分析土壤盐渍化时空变化特征，并采用地理加权回归模型分析土壤盐分的影响因素。结果表明,RF模型能够更准确地监测土壤盐渍化。2010-2023年，土壤盐渍化状况整体缓解，重度盐渍化消失，非盐渍化和轻度盐渍化面积增加，中度盐渍化面积减少。MGWR 回归系数表明，高植被覆盖区有助于抑制盐分的增加与迁移，高蒸散发与低海拔区域更易发生盐分积聚。此外，人口密度的增加显著加剧了土壤盐渍化，在邻近河流与土壤湿度较高的区域，由于水分供给较为充足，盐分累积程度较低。
- Abstract:
- In order to systematically analyze the spatiotemporal characteristics and influencing factors of soil salinization in Jimsar County, Xinjiang from 2010 to 2023, this study compared the predictive performance of three remote sensing inversion methods (RF, CART, and PLS). The optimal method (RF) was selected to analyze the spatiotemporal dynamics of soil salinization, and a geographically weighted regression (GWR) model was applied to identify driving factors. The results showed that, the RF model performed better, enabling more accurate monitoring of soil salinization. From 2010 to 2023, soil salinization was alleviated overall, severe salinization disappeared, while non-salinized and slightly salinized areas increased, and moderately salinized areas decreased. The MGWR (Multiscale Geographically Weighted Regression) coefficients revealed that areas with high vegetation coverage inhibited salt accumulation and migration, whereas regions with high evapotranspiration and low elevation were prone to salt accumulation. In addition, increased population density significantly aggravated soil salinization, while proximity to rivers and higher soil moisture (due to sufficient water supply) reduced salt accumulation.
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备注/Memo
收稿日期：2025-04-03