2005-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/657807摘要：本計畫為3年計畫的第三年計畫。目前臺灣全省土壤(農地)之調查報告中，尚缺乏臺中縣及南投縣農地共76個土系之物理、化學性質及土壤分類名稱之資料庫，急待補足此兩縣之農地土壤資料，以建立完整之台灣地區土壤資料庫系統。第三年(94年度)建立24個代表性土系之基本土壤特性及資料庫，同時進行土壤管理組規併及土壤資料之解釋與土壤管理之應用。 台灣地區的強酸性紅壤概分布在第四紀洪積母質之台地上，是農業生產上重要的土壤，但因其位於坡地上且pH值極低，粘粒與鐵鋁氧化物含量偏高，保肥力強但養分有效性偏低。強酸性紅壤不當施用硝酸態氮肥可能造成硝酸在土壤中的吸附而降低肥效，亦可能因強烈的淋洗作用而使硝酸移動至地下水而污染水體，影響環境品質。本計畫擬以屏東縣老埤台地紅壤為對象，藉由等溫吸附試驗、管柱淋洗及現地監測，以了解強酸性紅壤對硝酸之吸附作用並探討硝酸在強酸性土壤中之垂質移動，以評估紅壤施用硝酸態氮肥對土壤與環境品質的影響。 <br> Abstract: This project is the third year of the whole 3-year project. 76 soil series have been established in the rural soils of Taichung and Nantou counties in Taiwan, but there are no any basic soil physical and chemical soil properties to establish the soil database of Taiwan in these two counties. The soil characteristics including soil morphology, physical, and chemical properties of 24 soil series have been surveyed in this year project. The soil data of these 24 soil series will be included into the Taiwan New Soil Management Grouping System for soil interpretation and application of soil management. Quaternary red soils with strong acidity are mainly distributed in the terrace of Taiwan. They are important in agricultural production, but have extremely low soil pH values, high clay and Fe and Al oxides contents, strong holding capacity and low availability of nutrients. Desorption from soil and leaching into groundwater of nitrate was produced by excess application of chemical fertilizers to change the environmental quality. The Laopi soil series was conducted in the project for isotherm sorption test, column leaching and in situ monitoring of nitrate dynamics. The purposes of this project are to understand the sorption processes of nitrate in strongly acid red soil to explore the vertical movement of nitrate-N fertilizer and to assess the impact of nitrate-N fertilizer on soil and environmental quality土壤調查土壤理化性質土壤分類土壤管理紅壤硝酸態氮soil surveysoil physochemical propertysoil classificationsoil management groupred soilnitrate-N