Spatiotemporal Dynamics of Soil Salinity and Its Determinants in Songnen Plain

• Published in: Guanʻgai paishui xuebao Vol. 42; no. 4; pp. 108 - 115
• Main Authors: WANG Lulu, WANG Tianliang, GAO Bin, HE Huaizhen, DING Xiaowen, HOU Baodeng
• Format: Journal Article
• Language: Chinese
• Published: Science Press 01.04.2023
• Subjects: influence factors; land salinization; remote sensing interpretation; songnen plain; space-time change
• ISSN: 1672-3317
• DOI: 10.13522/j.cnki.ggps.2022339

【Objective】 Soil salinization is a dynamic process, affected by numerous factors. Understanding its spatiotemporal variation in a region and catchment is important for management. In this paper, we present the soil salinity dynamics and its determinants in Songnen Plain of Heilongjiang province. 【Method】 The calculation was based on remote sensing imagery of the region acquired from 2000—2020. We used correlation analysis and relative contribution rate analysis to map the spatiotemporal distribution of soil salinity in this region. 【Result】 On average, areas affected by salt in the region had decreased from 2000 to 2020, at a rate of 2.73 km2/a. But this is mainly due to the reduced soil salinization in some regions, as other regions actually had seen an increase in soil salinization. In particular, soil salinization in Qiqihar had increased because of the increase in cropped lands and GDP. Suihua also saw soil salinity rising due to increased plant areas and population. In contrast, soil salinity in Daqing a