文献类型： 外文期刊
作者： Yuan, Jin-Hua 1 ; Sheng-Zhe, E. 1 ; Che, Zong-Xian 1 ;
作者机构： 1.Gansu Acad Agr Sci, Inst Soil Fertilizer & Water Saving Agr, Lanzhou 730070, Peoples R China
2.Minist Agr, Gansu Sci Observing & Expt Stn Agroenvironm & Ara, Lanzhou 730070, Peoples R China
关键词： base cations; dolomite; gypsum; soil pH; Ultisol
期刊名称：SOIL RESEARCH （ 影响因子：1.987； 五年影响因子：2.47 ）
ISSN： 1838-675X
年卷期： 2020 年 58 卷 4 期
页码：
收录情况： SCI
摘要： Mineral composition and alkaline properties of palygorskite (Pal), and its ameliorative effects on chemical properties of acid soil were investigated. Dolomite was the main form of alkali in Pal and the acid neutralisation capacity of Pal was 215 cmol kg(-1). Incubation experiments indicated that Pal incorporation increased soil pH, cation exchange capacity, base saturation and exchangeable K+, Na+, Ca2+ and Mg2+ contents, and decreased the levels of exchangeable H+, Al3+ and acidity, over a 1-year period. The ameliorative mechanisms were the dissolution of major alkaline matter in Pal (i.e. dolomite), and the exchange between released Ca2+ and Mg2+ with H+ in acidic soil. Hence, Pal can be used as a moderate acidic soil amendment.
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