| 尿素在砖红壤中的淋失特征——Ⅰ．NH^＋4-N的淋失 |
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| 引用本文： | 罗微,林清火,茶正早,屈明,林钊沐.尿素在砖红壤中的淋失特征——Ⅰ．NH^＋4-N的淋失[J].西南农业大学学报,2005,27(1):85-88. |
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| 作者姓名： | 罗微 林清火 茶正早 屈明 林钊沐 |
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| 作者单位： | [1]中国热带农业科学院橡胶研究所，海南儋州571737 [2]西南农业大学资源环境学院，重庆400716 |
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| 基金项目： | 中国热带农业科学院博士启动基金项目的部分研究内容 |
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| 摘 要： | 通过室内大型模拟土柱研究不同尿素施甩量与砖红壤中NH4-N的淋失关系。结果表明：各施肥处理渗漏液中20cm处NH^ 4-N的最高浓度值与施肥量大小成正相关，60cm和120cm处渗漏液中NH^ 4-N浓度值与施肥量关系不大，但120cm处渗漏液中NH ^4-N浓度仍超过水体富营养化标准0．2mg／L。在砖红壤中，尿素以NH^ 4-N形态大量淋失的可能性不大。
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| 关 键 词： | 尿素 NH^＋4-N淋溶 砖红壤 |
LEACHING CHARACTERISTICS OF UREA IN LATOSOL I. THE TEACHING OF NH_4~+-N |
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| LUO Wei,LIN Qing-huo,CHA Zheng-zao,QU Ming,LIN Zhao-mu.LEACHING CHARACTERISTICS OF UREA IN LATOSOL I. THE TEACHING OF NH_4~+-N[J].Journal of Southwest Agricultural University,2005,27(1):85-88. |
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| Authors: | LUO Wei LIN Qing-huo CHA Zheng-zao QU Ming LIN Zhao-mu |
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| Abstract: | An experiment was carried out in laboratory with large soil columns to simulate NH4+ -N leaching in latosol when urea was applied at different rates. Fertilizer rate was in significant positive correlation with the highest concentration of NH4+- N in the leachate at 20 cm layter,and the correlation was non - significant at the 60 cm and 120 cm layer. The concentration of NH4+ - N in the leachate at the 120 cm layer was higher than the standard of eutrophication of fresh water (0.2 mg/L). Massive urea loss in the form of NH4+ - N through leaching seemed quite improbable in latosol. |
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| Keywords: | urea NH4+ -N leaching latosol |
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