尿素在臺灣水田土壤中的動態之基本研究(第一報)尿素在水田土壤中之銨化作用
Other Title
Studies on the Behavior of Urea in Various Paddy Soils of Taiwan (1) Ammonification of Urea Applied into Different Soils
Journal
農業研究
Journal Volume
18
Journal Issue
1
Start Page
49
End Page
54
Date Issued
1969-03-05
Date
1969-03-05
Author(s)
徐水泉
溫西濱
S.C. Hsu
C.P. Wen
Abstract
(1)為探討尿素與硫酸銨對水稻之肥効差異原因：選擇本省主要水田土壞十二種類（臺北、桃園、中壢、新竹、香山、豐原、臺中、溪湖、新營、佳里、屏東、花蓮）測定尿素在不同性質土壤中之銨分解狀況。
(2)根據試驗結果尿素在水田土壤中銨分解之緩速受土壤溫度，反應質地，有機質含量等之影響甚為顯著，即最適宜銨分解之溫度為35℃左右而土壤溫度較高時各土壤間之分解日數差異甚小。
(3)對土壤理化性質而言之尿素，在中性土壤中其分解較速於酸性土壤，而質地屬於砂質或坋質土壤中有機質含量較高之土壤銨分解亦較速於砂土或粘土。
(4)尿素之銨分解之緩速由土壤別而言溪湖砂質壤土最速新竹坋質壤土，豐原壤土，新營坋質壤土次之，花蓮坋質壤土，桃園壤土，屏東壤土又次之臺中砂質土，佳里壤土，臺北坋質壤土香山砂土，中壢粘土最緩之順序。
(1) To obtain basic information for the rational application of urea in various paddy soils in Taiwan, the rate of ammonification was studied on twelve paddy soils collected from the main paddy fields all over the island.
(2) The results showed that the rate of ammonification was largely affected by soil temperature, pH value and organic matter content in soil : It was faster in nuntral soils than in acidic soils and in the soils with higher organic matter content than in the soils with lower organic matter content. Higher soil temperature also promoted ammonification and the optimum was found about 35°C
(3) The rates of ammonification among various soils tested were in the following order:
His-fu sandy loam >Hsin-chu silt loam, Fong-yen loam, Hsing-ying silt loam > Hua-lien silt loam Tao-yen loam Ping-tung loam >Tai-chung sandy loam, Chia-yi loam, Taipei silty loam, Hsiang-shan sandy soil,Chung-li clay.
Publisher
農業試驗所
Type
journal article
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