贺兰山东麓绿洲多层次土壤水分亏缺及其影响因素的时空分析  

Spatio-temporal analysis of multi-layered soil moisture deficit and its influencing factors in the oases at the eastern foothill of Helan Mountains

作　　者：侯迎 刘雯惠 褚阳 马小娟 姚诗雨 倪同欣 HOU Ying;LIU Wenhui;CHU Yang;MA Xiaojuan;YAO Shiyu;NI Tongxin(College of Geography Science and Planning,Ningxia University,Yinchuan 750021,Ningxia,China;Faculty of Geographical Science,Beijing Normal University,Beijing 100875,China;State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]宁夏大学地理科学与规划学院,宁夏银川750021 [2]北京师范大学地理科学学部,北京100875 [3]中国科学院生态环境研究中心城市与区域生态国家重点实验室,北京100085

出　　处：《干旱区地理》2025年第4期649-660,共12页Arid Land Geography

基　　金：宁夏自然科学基金项目(2024AAC05041);国家自然科学基金项目(42161008)资助。

摘　　要：在被誉为“塞上江南”的贺兰山东麓绿洲,土壤水分是影响生态保护和社会经济高质量发展的重要限制因素。基于10层土壤水分数据(0~100 cm),利用时空趋势分析、偏回归分析等方法,对贺兰山东麓绿洲土壤水分亏缺的时空分布、演变特征及其影响因素进行多维分析,有助于深入理解该区不同深度土层水分变化的关联性及交互影响。结果表明:近20 a该区各层土壤水分的亏缺程度呈加剧趋势。随着土层深度增加,北部和南部绿洲各层土壤水分分别呈现亏→盈→亏→盈→亏和亏→盈→亏的多维空间分布特征,以及湿润化→干旱化→湿润化和湿润化→干旱化的多维时空演变趋势;降水量(PRE)和大气饱和水汽压差(VPD)对各层土壤水分的影响逐渐减弱,气温(TMP)的影响先增强后减弱,归一化植被指数(NDVI)的影响逐渐增强。综合而言,该区不同深度土层水分及其影响因素呈现规律性、多维时空变化特征,0~10 cm土层水分受PRE强烈的正向影响,10~30 cm和30~100 cm土层水分分别受TMP和NDVI较强的负向影响。In the oases at the eastern foothill of Helan Mountains,Ningxia,China,known as the“Jiangnan on the Frontier”,soil moisture is a critical limiting factor affecting ecological preservation and high-quality socio-economic development.Based on soil moisture data from ten layers(0-100 cm),multidimensional analyses were conducted on the spatiotemporal distribution,evolution characteristics,and influencing factors of soil moisture deficit in this region using methods such as spatiotemporal trend analysis and partial regression analysis.This approach enhances the understanding of the correlation and interactive effects of soil moisture changes at different depths.The results indicated that the degree of soil moisture deficit in various layers had intensified over the past 20 years.As soil depth increased,soil moisture in the northern and southern oases exhibited distinct multidimensional spatial distribution patterns:deficit-surplus-deficit-surplus-deficit and deficit-surplus-deficit,respectively.Additionally,they followed spatiotemporal evolution trends of wetting-drying-wetting and wetting-drying.The influences of precipitation(PRE)and vapor pressure deficit(VPD)on soil moisture across different layers gradually weakened,while the influence of temperature(TMP)first strengthened and then weakened,and the influence of the normalized difference vegetation index(NDVI)gradually increased.In summary,soil moisture at different depths and its influencing factors exhibited regular and multidimensional spatiotemporal variation patterns.The 0-10 cm layer was strongly positively influenced by PRE,whereas the 10-30 cm and 30-100 cm layers were significantly negatively affected by TMP and NDVI,respectively.

关 键 词：标准化土壤水分指数 土壤水分亏缺 时空变化 多维结构 贺兰山东麓绿洲 

分 类 号：S152.7[农业科学—土壤学]