尿素在砖红壤中的淋失特征 Ⅰ.NH_4^+-N的淋失  

LEACHING CHARACTERISTICS OF UREA IN LATOSOL I. THE TEACHING OF NH_4^+-N

作　　者：罗微[1] 林清火[1] 茶正早[1] 屈明[2] 林钊沐[1] 

机构地区：[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

出　　处：《西南农业大学学报（自然科学版）》2005年第1期85-88,共4页Journal of Southwest Agricultural University

基　　金：中国热带农业科学院博士启动基金项目的部分研究内容

摘　　要：通过室内大型模拟土柱研究不同尿素施用量与砖红壤中NH4+-N的淋失关系。结果表明:各施肥处理渗漏液 中20 cm处NH4+-N的最高浓度值与施肥量大小成正相关,60 cm和120 cm处渗漏液中NH4+-N浓度值与施肥量关 系不大,但120 cm处渗漏液中NH4+-N浓度仍超过水体富营养化标准0.2 mg/L。在砖红壤中,尿素以NH4+-N形态 大量淋失的可能性不大。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.

关 键 词：尿素 NH^+4-N淋溶 砖红壤 

分 类 号：S143.1[农业科学—肥料学]