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題 名 | 水稻對以N-15標識之硫酸銨追肥之吸收率=Recovery of Top Dressed N-15 Ammonium Sulfate by Rice Plant |
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作 者 | 譚鎮中; 王銀波; 黃紋賓; 黃亨通; 李瑞成; | 書刊名 | 中華農學會報 |
卷 期 | 182 1998.06[民87.06] |
頁 次 | 頁99-110 |
分類號 | 434.111 |
關鍵詞 | 水稻; 氮肥吸收率; N-15; Paddy rice; Nitrogen fertilizer recovery; |
語 文 | 中文(Chinese) |
中文摘要 | 以往對於水稻氮肥的田間研究,大都著重在水稻全期對氮肥的吸收利用,而甚少 提及各別追肥之吸收利用與氮肥之動向。本研究係以N-15標識的硫銨作為水稻氮素追肥的 來源,分別在后里、芬園、田尾等三個地區水稻田進行田間試驗,其土壤分別為坋質壤土、 細砂質壤土及坋質黏壤土,而各別於一、二期作水稻的三次不同追肥時間施用N-15標識的 硫銨,來追蹤探討不同時期水稻對氮肥的吸收率。 試驗結果顯示,三個試區中,不同追肥期水稻對氮肥的吸收率,一期作為第三次追肥(28.3 ∼45.4%)最高,第二次追肥(22.4∼40.2%)次之,第一次追肥(4.2∼26.9%)最低,二期作為第 二次追肥(30.4∼47.8%)最高,第三次追肥(17.6∼34.8%)次之,第一次追肥(4.9∼30.4%)最低。 在追肥總吸收率上,二期作(20.0∼34.6%)與一期作(22.9∼33.3%)比較,差異並不顯著。 |
英文摘要 | A field study was conducted to determine the recovery of top dressed nitrogen fertilizer by rice plant when N-15 labeled ammonium sulfate was top dressed both to the spring rice crop and to the autumn rice crop at three different growth stages. The experimental sites were located at Ho-li, Fen-yen and Tien-wei and the texture of the soils are silt loam, sandy loam and silty clay loam, respectively. The obtained results showed that the highest recovery (28.3∼45.4%) by spring rice plant was found for 3rd top dressing, followed by 2nd top dressing (22.4∼40.2%) and 1st top dressing (4.2∼ 26.9%). The respective values for autumn rice plant were 2nd top dressing (30.4∼47.8%), followed by 3rd top dressing (17.6∼34.8%) and 1st top dressing (4.9∼30.4%). The pattern of N-15 fertilizer recovery by spring rice plant (22.9∼33.3%) was not different from that of autumn rice plant (20.0∼ 34.6%) significantly. |
本系統中英文摘要資訊取自各篇刊載內容。