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頁籤選單縮合
題名 | Soil Hydrology and Micromorphology of Illuvial Clay in an Ultisol Hydrosequence=極育土水文土序中土壤水文學與洗入粘粒微形態學的關係 |
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作者 | 許正一; 陳尊賢; Hseu, Zeng-yei; Chen, Zueng-sang; |
期刊 | 中國農業化學會誌 |
出版日期 | 19971000 |
卷期 | 35:5 1997.10[民86.10] |
頁次 | 頁503-512 |
分類號 | 434.223 |
語文 | eng |
關鍵詞 | 土壤水文學; 氧化還原電位; 微形態學; 鐵網紋; 粘粒膜; Soil hydrology; Redox potential; Micromorphology; Plinthite clay coating; |
中文摘要 | 對於具有人為浸水狀況土壤粘聚層中之洗入粘粒的型態,有必要結合水文學做 進一步的探討。在臺灣北部桃園臺地之極育土水文序列中,選擇三個土壤樣體以監測其短 期地下水位及氧化還原電位之變化,並研究其微形態學。結果顯示,鐵綱紋出現的深度隨 排水情況而遞增,依序為後湖土系(Houhu series)(典型鐵綱紋浸水極育土)<新屋土系 (Hsinwu series)(典型鐵綱紋濕潤極育土)<龍中土系(Lungchung series)(鐵綱紋浸水 老育濕潤極育土),其中以後湖土系鐵綱紋出現的深度最淺,排水最差。後湖土系之剖面 幾乎終年飽和且還原,色度僅為1之斑紋伴隨而生,過強之還原程度使洗入粘粒之定位現 象被抑制。但在新屋土系約75公分並具有色度3斑紋之土壤深度,一年約有25%的還原時間 ,恰當的氧化還原交替作用使具有強烈定位現象的粘粒膜被拉長。龍中系在約75公分處之 Bt層中飽和時間低於2個月,而還原時間僅約一年中之12%,使洗入粘粒趨於呈現光學各向 同性。 |
英文摘要 | It is necessary to study the accumulated patterns of translocated clay in the argillic horizon of soils under anthraquic conditions associated with soil hydrology. An Ultisol hydrosequence including three soil pedons was selected to monitor the water table and redox potential (Eh) in 1996, and to study their micromorphology of the pedons located on the Chungli Terrace of Taoyuan County, northern Taiwan. From the results, depth of plinthite increased with increasing drainage as follows: Houhu (Typic Plinthaquults) < Hsinwu (Typic Plinthudults) < Lungchung (Plinthaquic Paleudults). The Houhu pedon was reduced and saturated almost throughout the year with chroma 1, and strong reduction of the pedon disturbed the orientation of illuvial clay. In Hsinwu pedon, elongated clay coating with strong orientation were found which resulted from optimum alternate oxidation and reduction cycles at a 75-cm depth with chroma 3 in a period of 25% of the year. Less than two months of saturation conditions and only 12% of the year under reduction conditions at a 75- cm depth, equal to Bt horizon, of Lungchung pedon resulted in isotropy of the illuvial clays. |
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