|Title:||旱田土壤中尿素肥料之轉化||Other Titles:||Studies on Urea Transformation in Soils Uder Upland Condition||Authors:||連深
|Keywords:||尿素;旱田;氮素;轉化;upland;soils;nitrogen;transformations||Issue Date:||7-Jun-1992||Publisher:||農業試驗所||Journal Volume:||41||Journal Issue:||2||Start page/Pages:||187-200||Source:||中華農業研究||Abstract:||
供試土壤為臺北砂頁岩質沖積土（低鹽基淡色弱育土，Dystrochrepts），pH6.1（原pH為4.0，試驗前施用碳酸鈣將其提高為6.1)，及彰化粘板岩質沖積土（簡育浸水弱育土，Haplaquepts), pH7.4。兩種土壤之質地，均屬份質壤土。The Patterns of urea transformation in soils under upland condition were studied in laboratory.
The soils studied were: (1) an acidic Taipei sandstone and shale alluvial soil (Dystrochrepts) with pH 4.0 (the pH, however, was adjusted to 6.1 by CaCO3 before the experiment), and (2) a calcareous Changhua slate alluvial soil (Haplaquepts) with pH 7.4. Ninety grams each of soils placed in 100 CC-beaker was applied, respectively with different rates of nitrogen (corresponding to 0, 30, 60 and l50mg/l00g soil) in the forms of urea and sulfur coated urea, mixed thoroughly and incubated under 30℃. The soil moisture was kept at Ca. 50% of the saturation capacities of soils.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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