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題 名 | 石灰的添加對強酸性土壤之Inositol Hexaphosphate和磷酸鉀吸附特性的影響=The Sorption Characteristtics of Inositol hexaphosphate and Potassium Dihydrate Phosphate in Strongly Acid Soils as Affected by Liming |
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作 者 | 陳仁炫; | 書刊名 | 中華農學會報 |
卷 期 | 174 1996.06[民85.06] |
頁 次 | 頁91-110 |
分類號 | 434.22 |
關鍵詞 | 強酸性土壤; 磷吸附特性; 石灰施用; Acid soil; P sorption characteristics; Liming; |
語 文 | 中文(Chinese) |
中文摘要 | 強酸性土壤已知對無機磷均具強烈的吸附能力,唯其吸附量的多寡,可能因土壤本身性質及石灰肥施用而顯現不同的效應。本實驗的目的即在探討(1)石灰的添加對強酸性土壤之無機磷和有機磷吸附能力的影響;及(2)尋求最適於描述石灰施用後之土壤有機磷吸附特性的吸附等溫式。選取已知風化程度和磷吸附能力差異大的三種強酸性土壤(關西、中寮和北溝),分別以氫氧化鈣(Ca(OH)₂)調成三種不同的pH值下培育三十天後,分別測定各土壤對Inositol hexaphosphate (IHP)和磷酸鉀吸附能力的改變,並評估四種慣用之吸附模式(Linear Langmuir、Non-Linear Langmuir, Modified Langmuir,和Freundlich等溫式,在描述強酸性土壤於不同量石灰添加後對無機磷和有機磷之吸附特性的適宜性。結果顯示強酸性土壤的風化程度愈深者,其對IHP及磷酸鉀吸附能力均愈強,且強酸性土壤對IHP的吸附能力顯著的高於磷酸鉀。石灰施用後對強酸性土壤IHP與磷酸鉀的吸附能力之影響效應乃隨土壤特性之不同而異,而交換性鋁飽和度、非結晶性鋁及黏粒含量為影響強酸性土壤對IHP之吸附能力的最重要土壤性質。四種慣用之磷吸附模式中以Linear Langmuir等溫式為最適於描述石灰的施用對強酸性土壤之磷酸鉀和IHP吸附特性的現象。 |
英文摘要 | Strongly acid soils have been known to have strong phosphorus (P) sorption capacity, however, the capacity may be affected by the characteristics of soils and the addition of lime. The objectives of this research were to (1) study the effect of liming on the sorption capacity of inorganic and organic P in strongly acid soils; and (2) evaluate the suitability of four P sorption isotherms in describing P sorption characteristics of soils after liming. Three acid soils (kuan-Si, Chun-Liao, and Bei-Go) with various weathering degree and P sorption capacity were selected in this study. Soils were limed to three different pH levels with Ca(OH)₂, then were incubated at room temperature (25°C). The changes of the sorption capacities of Inositol hexaphosphate (IHP) and Potassium dehydrate phosphate (KH₂PO₄) of the soils were determined after thirty days. Aditionally, four P sorption isotherms (Linear Langmuir, Modified Langmuir, Non-Linear Langmuir, and freundlich) were evaluated their suitabilities in describing P sorption characteristics after liming. Results showed that the sorption capacities of the soils for were increased with the degree of soil weathering, and the changes of sorption capacity of IHP and KH₂PO₄ in the soils as affected byliming were varied with the characteristics of soils. In general, the contents of Al saturation, amorphous Al and clay were the main factors in controlling the IHP sorption capacities of strongly acid soils, and Linear Langmuir isotherm was more suitable than other isotherms in describing P sorption characteristics of soils after liming. |
本系統中英文摘要資訊取自各篇刊載內容。