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Arid Land Geography ›› 2023, Vol. 46 ›› Issue (8): 1314-1323.doi: 10.12118/j.issn.1000-6060.2023.008

• Biology and Pedology • Previous Articles     Next Articles

Soil salinization characteristics of cultivated land in Xiaohaizi Irrigation Area of Xinjiang

SHI Cong1(),CHEN Lihan1,ZHANG Yifei1,HE Shuai2,3,4(),XIE Haixia1   

  1. 1. Department of Agricultural Resources and Environment, College of Agriculture, Shihezi University, Shihezi 832000, Xinjiang, China
    2. Institute of Farmland Water Conservancy and Soil Fertility, Xinjiang Academy of Agricultural Reclamation Sciences, Shihezi 832000, Xinjiang, China
    3. Northwest Oasis Water-saving Agriculture Key Laboratory, Ministry of Agriculture and Rural Affairs of the People’s Rebublic of China, Shihezi 832000, Xinjiang, China
    4. Key Laboratory of Efficient Utilization of Water and Fertilizer, Xinjiang Production & Construction Corps, Shihezi 832000, Xinjiang, China
  • Received:2023-01-04 Revised:2023-03-10 Online:2023-08-25 Published:2023-09-21

Abstract:

This article chooses the Xiaohaizi Irrigation Area of the Third Division of the Xinjiang Production and Construction Corps, Xinjiang, China, as the research object. In April 2021, 324 soil samples were collected in layers (including 0-20 cm and 20-40 cm) to determine the total salt, eight major ions, and pH values. Descriptive statistics, significance testing, and spatial interpolation were used to analyze the soil salt content and distribution characteristics in the irrigation area. The results reveal that: (1) The varying degrees of salinization affect the soil in the Xiaohaizi Irrigation Area, and the distribution of total salt and various base ions in the soil is extremely uneven in space. The salt concentration generally exhibits a low distribution pattern in the southwest and high distribution characteristic in the northeast. The areas with the most severe soil salinization hazards are the 51st and 53rd regiments. (2) The research area is primarily composed of chloride sulfated soil, distributed in main areas of the 51st and 44th regiments and some areas of the 50th and 53rd regiments. Sulfated soil is distributed at the junction of the 44th, 50th, and 51st regiments, whereas chloride saline soil is distributed in the majority of the 49th regiment. (3) Moderately saline soil is the most widely distributed in the surface area of the study area, followed by lightly saline soil. Severely saline soil is concentrated in the 51st regiment, the middle of the 44th regiment, and the junction between the 50th and 53rd regiments. Lightly saline soil is the soil layer with the largest distribution area of 20-40 cm, followed by moderately saline and nonsaline soil. The research results provide theoretical basis and data support for targeted management of soil salinization by clarifying the characteristics, types, and degree of soil salinity within the region and continuously improving the local irrigation and drainage management system in the future.

Key words: soil salinization, Xiaohaizi Irrigation Area, descriptive statistics, Kriging interpolation