施氮对砖红壤铵态氮淋失特征的影响  

On Effects of Types and Quantity of Nitrogen Fertilizer on Leaching Ammonium Nitrogen of Latosol

作　　者：代文才[1] 高明[1] 王子芳[1] 黄容[1] 

机构地区：[1]西南大学资源环境学院/重庆市三峡库区农业面源污染控制研究中心,重庆400715

出　　处：《西南师范大学学报（自然科学版）》2015年第9期162-167,共6页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：国家"十二五"科技支撑项目(2012BAD14B18)

摘　　要：以海南省海口市观澜湖采集的砖红壤为研究对象,采用室内土柱淋溶模拟试验方法,研究了不同氮肥种类及施用量对可变电荷土壤铵态氮淋失特征的影响.结果表明:1整个淋溶过程中,模拟试验各处理NH4+淋失浓度的平均值随模拟淋溶时间的增加而增加,各处理NH4+浓度表现大小顺序为:硫酸铵,硝酸铵,尿素,N0;而增幅却随模拟淋溶时间的增加而减小.2将硫酸铵,硝酸铵和尿素整个淋溶过程的NH4+平均淋失浓度与施肥量做相关分析得线性方程:y=0.001 8 x+2.102 4(R2=0.739 9),y=0.00 3 x+1.211 1(R2=0.937 4)和y=0.004 2 x+0.565 7(R2=0.971 5),可得硫酸铵,硝酸铵和尿素在不同施用量下砖红壤铵态氮的淋失速率分别为0.18%,0.30%和0.42%.Taking latosol collected in Guanlan Lake of Haikou in Hainan province as subjects,an investigation has been conducted in this paper on the influential factors through simulating column-leach indoor and in the method of intermittent leaching.The results show that 1）the leaching process,which took the average 3stages of simulation test,the NH＋4leaching concentration increased with the increasing of leaching time while the reducing growth has increased with simulated leaching time.Therefore,the 3stages simulation test the concentration of NH＋4showed：ammonium sulfateammonium nitrateureaN0;2）ammonium sulfate,ammonium nitrate and urea respectively can be representation by linerar y=0.001 8 x＋2.102 4（R2=0.739 9）,y=0.003 x＋1.211 1（R2=0.937 4）and y=0.004 2 x＋0.565 7（R2=0.971 5）,The leaching rate of ammonium sulfate,ammonium nitrate and urea,however,under different fertilization amount of Latosol ammonium nitrogen were 0.18%,0.30% and 0.42%.

关 键 词：尿素 硝酸铵 硫酸铵 铵态氮 

分 类 号：S143.1[农业科学—肥料学] S151.93[农业科学—农业基础科学]