额尔根尼高地北坡停止灌溉后的盐渍土组合

Q4 Agricultural and Biological Sciences Biulleten'' Pochvennogo instituta im VV Dokuchaeva Pub Date : 2019-06-18 DOI:10.19047/0136-1694-2019-97-52-90
N. Khitrov, I. Gorokhova, E. I. Kravchenko
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引用次数: 2

摘要

对该农田的土壤覆盖和土壤盐度进行了研究,并给出了研究结果。勘探的农田位于Svetloyarskaya灌溉系统的Chervlenoye灌溉区内(伏尔加格勒地区南部)。它的特点是在卫星图像上可以看到明暗相间的宽条纹。直到20世纪90年代中期,这片土地一直被灌溉,并受到二次盐碱化的影响,从那时起,它一直被用于旱地农业系统。土壤组合是由草原浅栗子-盐土复合体进行的,该复合体因地表平整和灌溉而转化为土壤累积碳酸盐分离盐(Sodic Endoprotorisalic Camisol(Loamic、Aric、Protocacic、Ochric、Bathyypsic)和Camdic Calcisols(Loamid、Aric))和深盐,以及农业轻质腐殖质累积碳酸盐分层土壤。田地上的亮带标志着表面富含碳酸盐的土壤(12-13%CaCO3)(钙质土(壤土、干旱土)),以及其他表面碳酸盐含量低5-10倍的土壤。所有的土壤都是含盐的,但含盐量在太空中以波浪状的方式变化,这与卫星图像不一致。讨论了碳酸盐和盐类在土壤组合中的二维分布。在停止灌溉和地下水曲线下降超过7米后20年,以氯化钙和氯化镁的形式显示了次生盐碱化的残余迹象。
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COMBINATION OF SALINE SOILS OF THE NORTHERN SLOPE OF THE ERGENI UPLAND AFTER IRRIGATION CESSATION
The soil cover and soil salinity of the field were studied and the results are given in the article, the explored fileld is located within the Chervlenoye irrigated area belonging to Svetloyarskaya irrigation system (south of the Volgograd region). It was characterized by alternating dark and light wide strips visible on the satellite image. The field was irrigated until the mid-1990s and was subject to secondary salinization, since that time it has been used in dry-farming system. The soil combination is performed by steppe light chestnut solonetzic complex that was transformed due to the surface leveling and irrigation into agrozem accumulative-carbonate segregation saline (Sodic Endoprotosalic Cambisol (Loamic, Aric, Protocalcic, Ochric, Bathygypsic) and Cambic Calcisols (Loamic, Aric)) and deep saline, and agro-light-humus accumulative-carbonate stratified soil. The bright bands on the field mark soils rich in carbonates on the surface (12–13 % CaCO 3 ) (Calcaric Cambisol (Loamic, Aric)) among the other soils that contain less carbonates on the surface by 5–10 times. All the soils are saline, but the salt content varies in space in a wave-like manner, wich disagrees with the satellite image. Two-dimensional distributions of carbonates and salts in the soil combination are discussed. The residual signs of secondary salinization are revealed in the form of calcium and magnesium chlorides two decades after the cessation of irrigation and drawdown of the groundwater curve deeper than 7 m.
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
15
审稿时长
8 weeks
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