以炭资材改善泥岩土壤之物化性质.pdfVIP

社團法人中華水土保持學會102 年度年會 1 以炭資材改善泥岩土壤之物化性質 [1] [1] [1] [2*] 尤敬弦 顏粕昇 郭婉儀 簡士濠 摘 要 本研究以 400 °C 及 700 °C 兩種溫度裂解而成之稻穀炭作為土壤改良基材，分別以 0％、2.5 ％、5％及10％ (w/w)之添加量均勻混入泥岩土壤，並培育21 周。培育期間，每21 天固定測定總體密度、 顆粒密度、孔隙率、電導度、陽離子交換容量、鹽基飽和度等物化性質。試驗結果顯示，土壤孔隙率隨施用 率增加而顯著提升，最高施用量（10％）下，孔隙率顯著增加 1.4倍以上。因稀釋作用，兩種溫度稻殼炭之 電導以 10％添加量為最低，約為 15 ds/m 。陽離子交換容量各處理間無明顯差異，皆約為 10 cmol(+)/kg- 1 ；鹽基飽和度各處理皆為100％，亦無差異。本試驗結果指出添加稻穀炭僅顯著對泥岩土壤 之物理性質具有改善效果。 關鍵詞：稻殼炭、泥岩、物理化學性質。 Improvement of Soil Physiochemical Properties in Mudstone Soils by using Biochar Jing-Shen Yu[1] Po-Sheng Yan[1] Wan-Yi Kuo[1] Shih-Hao Jien[2*] ABSTRACT This study used rice hull biochar, which pyrolized with 400℃ and 700℃, to be soil amendments to incorporate into the mudstone soil with different application rates of 0％，2.5％， 5％ and 10％ (w/w). The soil samples were collected at 0, 21, 42, 63, 84, 105, 126 and 147 days for analysis of soil physiochemical properties, including practical and bulk density, porosity, electrical conductivity (EC), cation exchange capacity (CEC), and base saturation percent (BS). As comparison with the control (i.e, not add biochar), the incorporation of biochar in the highest application rate (10%) significantly increased porosity by 1.4 times. The EC values were the lowest (15 dS/m) in the treatment of 10% biochar incorporation, and no any differences were found between biochars pyrolized by temperatures. Cation exchange capacity (CEC) and base saturation (BS) did not influenced by biochar incorporation. In conclusion, incorporation of rice hull biochar just only improved the physical properties in mudstone soils based on our results. Key Words: Rice hull biochar, mudstone, physiochemical properties. 一、前 言 臺灣地區泥岩土壤主要分布在曾文溪以南的台南縣及高雄縣等丘陵地區 ，主要屬於