尚白军, 郑博文, 周智彬, 王利界. 新疆玛依湖区土壤盐渍化过程中土壤粒径分形特征[J]. 云南大学学报(自然科学版), 2020, 42(5): 896-905. doi: 10.7540/j.ynu.20190658
引用本文: 尚白军, 郑博文, 周智彬, 王利界. 新疆玛依湖区土壤盐渍化过程中土壤粒径分形特征[J]. 云南大学学报(自然科学版), 2020, 42(5): 896-905. doi: 10.7540/j.ynu.20190658
SHANG Bai-jun, ZHENG Bo-wen, ZHOU Zhi-bin, WANG Li-jie. Characteristics of soil particle size and fractal dimension during soil salinization in Mayi Lake regions, Xinjiang[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(5): 896-905. DOI: 10.7540/j.ynu.20190658
Citation: SHANG Bai-jun, ZHENG Bo-wen, ZHOU Zhi-bin, WANG Li-jie. Characteristics of soil particle size and fractal dimension during soil salinization in Mayi Lake regions, Xinjiang[J]. Journal of Yunnan University: Natural Sciences Edition, 2020, 42(5): 896-905. DOI: 10.7540/j.ynu.20190658

新疆玛依湖区土壤盐渍化过程中土壤粒径分形特征

Characteristics of soil particle size and fractal dimension during soil salinization in Mayi Lake regions, Xinjiang

  • 摘要: 以新疆玛依湖为研究对象,以不同湖区和不同土层深度的土壤粒径分布数据为基础,利用单重分形方法,分析了土壤粒级与分形维数间的关系以及土壤盐渍化过程中土壤分形维数的变化特征. 结果表明:①玛依湖区土壤颗粒的主要组成部分为粉粒,土壤质地类型主要为粉壤土、粉土、砂土和砂质壤土,湖区土壤分形维数D值在1.79~2.71之间,分形维数水平方向上表现为东西向呈直线减小趋势,南北向呈先增大后减小趋势,垂直方向上表现为从表层(0~20 cm)向底层(60~80 cm)呈先降低后升高再降低趋势. ②玛依湖区土壤均呈现不同程度的盐渍化,重度盐渍化的占比最大,为37.25%;轻度盐渍化和中度盐渍化的占比相近,分别为30.28%和31.47%. ③土壤分形维数可以作为湖区土壤发生盐渍化的指标,当D值大于2.28时,土壤出现中度盐渍化;当D值大于2.38时,土壤出现重度盐渍化. 玛依湖是克拉玛依市东部生态屏障的水源地,湖区的生态环境关系着克拉玛依市主城区的生态安全,研究湖区土壤盐渍化过程中土壤粒径分形维数的变化特征,能够为湖区土壤盐渍化治理提供科学指导.

     

    Abstract: This paper takes Mayi Lake as the research object; based on the data of soil particle size distribution in the lake’s different areas and different soil depths, the relationship between soil particle size and fractal dimension, and the change characteristics of soil fractal dimension in excessive salinization were analyzed by single fractal method. The results show that: ① In Mayi Lake regions, the main component of soil particles is silt; the soil texture types are mainly silt loam, silt, sand and sandy loam; and the fractal dimension D value of soil is between 1.79 and 2.71. Horizontally, the fractal dimension of soil shows an east-west-straight-line-decrease trend, and a south-north trend that first increases and then decreases; and vertically, from the surface layer (0—20 cm) to the bottom layer (60—80 cm), the fractal dimension of soil first decreases, then increases and decreases again. ② The soil in Mayi Lake regions is found to have three different salinization degrees: severe salinization accounts for the largest part, being 37.25%; and mild salinization and moderate salinization are similar, being respectively 30.28% and 31.47%. ③ The fractal dimension of soil can be used as the index of soil salinization in the lake regions. When the D value is over 2.28, the soil demonstrates moderate salinization, and when the D value is over 2.38, the soil demonstrates severe salinization. Mayi Lake is the water source of ecological barrier in the eastern part of Kelamayi City. The ecological environment of the lake regions is related to the ecological security of the main urban area of Kelamayi City. Studying the change characteristics of fractal dimension of soil particle size in the process of soil salinization in the lake regions can provide scientific guidance for the control of soil salinization in the lake regions.

     

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