【摘要】：以不同地表植被與改良處理條件下的蘇打鹽漬土為研究對象,研究了蘇打鹽漬土物理性質(zhì)的差異。不同地表植被選擇松嫩平原蘇打鹽漬土區(qū)常見的蘆葦、羊草、虎尾草、堿茅、堿蓬以及無植被覆蓋的堿斑裸地;不同改良處理選擇砂土、有機質(zhì)、脫硫石膏以及脫堿一號(大安堿地生態(tài)試驗站研制的蘇打鹽漬土改良劑)以及對照。主要測試的物理指標有土壤容重、土壤水分入滲速率、土壤顆粒組成和土壤緊實度等。研究結(jié)果表明,1、相比于堿斑裸地,植被覆蓋條件下的蘇打鹽漬土具有較好的物理性質(zhì);不同地表植被下,蘆葦與羊草下的土壤物理性質(zhì)優(yōu)于虎尾草、堿蓬與堿茅下的土壤物理性質(zhì)。2、不同改良處理中,脫堿一號對于蘇打鹽漬土物理性質(zhì)的改良效果最好,其次是有機質(zhì)、脫硫石膏與砂土。本研究結(jié)果為蘇打鹽漬土區(qū)植被恢復和重建提供重要的數(shù)據(jù)支持;同時該研究結(jié)果對于重度蘇打鹽漬土的改良和利用具有重要的指導意義。
[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.
【學位授予單位】：中國科學院研究生院（東北地理與農(nóng)業(yè)生態(tài)研究所）
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S156.4

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