不同地表植被与改良处理下苏打盐渍土物理性质研究
发布时间：2019-01-05 17:02
【摘要】：以不同地表植被与改良处理条件下的苏打盐渍土为研究对象,研究了苏打盐渍土物理性质的差异。不同地表植被选择松嫩平原苏打盐渍土区常见的芦苇、羊草、虎尾草、碱茅、碱蓬以及无植被覆盖的碱斑裸地;不同改良处理选择砂土、有机质、脱硫石膏以及脱碱一号(大安碱地生态试验站研制的苏打盐渍土改良剂)以及对照。主要测试的物理指标有土壤容重、土壤水分入渗速率、土壤颗粒组成和土壤紧实度等。研究结果表明,1、相比于碱斑裸地,植被覆盖条件下的苏打盐渍土具有较好的物理性质;不同地表植被下,芦苇与羊草下的土壤物理性质优于虎尾草、碱蓬与碱茅下的土壤物理性质。2、不同改良处理中,脱碱一号对于苏打盐渍土物理性质的改良效果最好,其次是有机质、脱硫石膏与砂土。本研究结果为苏打盐渍土区植被恢复和重建提供重要的数据支持;同时该研究结果对于重度苏打盐渍土的改良和利用具有重要的指导意义。
[Abstract]:The differences of physical properties of soda-saline soils under different surface vegetation and improved treatments were studied. Different surface vegetation of Soda saline soil area of Songnen Plain common Reed, Leymus chinensis, Saxifraga, Suaeda salsa and bare land without vegetation cover; Sand, organic matter, desulphurized gypsum and desalinized No.1 (Soda salinized soil modifier developed by Da'an Alkali Ecological Test Station) and control were selected for different improvement treatments. The main physical indexes were soil bulk density, soil moisture infiltration rate, soil particle composition and soil compactness. The results show that: 1, the soda-saline soil under vegetation cover has better physical properties than the soda-covered soda-saline soil; Under different surface vegetation, the soil physical properties of Reed and Leymus chinensis were better than those of Saxifraga chinensis, and the soil physical properties of Suaeda salsa and alkali-fescue were better than those of Leymus chinensis. 2. Among the different improvement treatments, Dealkali No. 1 had the best effect on the improvement of physical properties of soda-saline soil. Next are organic matter, desulphurized gypsum and sand. The results of this study provide important data support for vegetation restoration and reconstruction in soda-saline soil area and have important guiding significance for the improvement and utilization of heavy soda-saline soil.
【学位授予单位】：中国科学院研究生院（东北地理与农业生态研究所）
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S156.4
本文编号：2402058
[Abstract]:The differences of physical properties of soda-saline soils under different surface vegetation and improved treatments were studied. Different surface vegetation of Soda saline soil area of Songnen Plain common Reed, Leymus chinensis, Saxifraga, Suaeda salsa and bare land without vegetation cover; Sand, organic matter, desulphurized gypsum and desalinized No.1 (Soda salinized soil modifier developed by Da'an Alkali Ecological Test Station) and control were selected for different improvement treatments. The main physical indexes were soil bulk density, soil moisture infiltration rate, soil particle composition and soil compactness. The results show that: 1, the soda-saline soil under vegetation cover has better physical properties than the soda-covered soda-saline soil; Under different surface vegetation, the soil physical properties of Reed and Leymus chinensis were better than those of Saxifraga chinensis, and the soil physical properties of Suaeda salsa and alkali-fescue were better than those of Leymus chinensis. 2. Among the different improvement treatments, Dealkali No. 1 had the best effect on the improvement of physical properties of soda-saline soil. Next are organic matter, desulphurized gypsum and sand. The results of this study provide important data support for vegetation restoration and reconstruction in soda-saline soil area and have important guiding significance for the improvement and utilization of heavy soda-saline soil.
【学位授予单位】：中国科学院研究生院（东北地理与农业生态研究所）
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S156.4
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