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Soil salinization of cultivated land in Shandong Province, China-Dynamics during the past 40 years

机译：山东省耕地土壤盐渍化，中国 - 动态在过去的40年中

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An objective requirement of the sustainable utilization of soil resources and agricultural production management is the determination of the status of soil salinization and an understanding of its dynamics. This study selected the coastal plain, the Yellow River flood plain, and key inland areas with salinization in Shandong Province. Sampling and analysis of soil salinization in cultivated lands were conducted in 2015-2016, and 3,551 valid samples were obtained. Statistical and spatial analyses were performed and compared with the data from the Second Soil Survey (1979-1985). The degree, area, distribution, and dynamic characteristics of soil salinization in Shandong Province were analyzed. The results showed that the total salt content of the study area was mainly slight to moderate, and the salinization was dominated by chloride salts. At present, the land area of salinized cultivated land was 384.00 thousand ha, accounting for 11.30% of the total cultivated land area. Soil salinization showed a concentrated distribution along the coastal plain that was scattered in the Yellow River flood plain and inland areas, and the salinity decreased from the coast to the inland area. Compared with the Second Soil Survey period, the salinized cultivated land area had decreased by 431.59 thousand ha, a decrease of 52.9%. The degree of salinization, especially in coastal area, was substantial, and the gravity center moved northeastward. In this study, the characteristics and dynamics of the present state of soil salinization in Shandong Province were examined, providing a scientific basis for the utilization and management of cultivated land resources in saline areas.
机译：对土壤资源和农业生产管理可持续利用的客观要求是确定土壤盐渍化状态和对其动态的理解。本研究选择了沿海平原，黄河洪水平原，以及山东省盐渍化的主要内陆地区。 2015 - 2016年进行耕地土壤盐渍化的采样和分析，得到3,551个有效样品。进行统计和空间分析，并与来自第二种土壤调查（1979-1985）的数据进行比较。分析了山东省土壤盐渍化的程度，面积，分布和动态特征。结果表明，研究区的总盐含量主要是轻微的，盐渍化由氯化物盐占主导地位。目前，盐渍化耕地的土地面积384.0万公顷，占耕地面积的11.30％。土壤盐渍化显示沿着沿海平原的集中分布，散落在黄河洪水平原和内陆地区，盐度从海岸减少到内陆地区。与第二种土壤调查期相比，盐渍化耕地面积减少了431.59万公顷，减少52.9％。盐渍化程度，特别是在沿海地区，是大幅的，重力中心向东北移动。在这项研究中，研究了山东省土壤盐渍化现状的特点和动态，为盐水区耕地资源的利用和管理提供了科学依据。

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