典型红壤中硝态氮垂直运移的模拟比较  

Simulation and Comparison of Vertical Transport of Nitrate-N in Typical Red Soil

作　　者：李绣红[1] 管仪庆[1] 张丹蓉[2] 戴海霞[1] 

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098

出　　处：《湖南农业科学》2011年第12期45-48,64,共5页Hunan Agricultural Sciences

基　　金：中央高校基本科研业务费专项资金(2010B01014);教育部"111"引智计划(B08048);水文水资源与水利工程科学国家重点实验室自主研究课题(2009585312)

摘　　要：采用室内试验和模型拟合研究了中国科学院桃源农业生态实验站径流小区典型红壤中NO3--N运移规律和动态变化。通过室内模拟土柱淋溶试验探讨了硝态氮在稳定流场、饱和均质土壤中的时间空间变化过程;分别用HYDRUS-1D和CXTFIT软件模拟硝态氮在土壤中的运移,通过求解反问题,拟合硝态氮的穿透曲线(BTC曲线),估算土壤水力学参数,并对比了两种模型的拟合结果。试验结果可为预测硝态氮对当地地下水环境的影响提供依据。The migration rules and dynamic variation of NO3-N in typical red soil in the runoff plot of CAS Taoyuan agroecotype experimental station were studied through laboratory experiment and model fitting. The time and space variation process of nitrate-N in stationary flow field and saturated homogeneous soil were recorded via simulation of soil column leaching in laboratory, and HYDRUS-1D and CXTFIT software were applied respectively to simulate the migration of nitrate-N in the soil. By fitting breakthrough curve of nitrate-N, hydraulics parameters were calibrated, and the results of the two calibrations were compared. The research results could provide scientific bases for predicting influence of nitrate-N On environment of local groundwater.

关 键 词：红壤 硝态氮 垂直运移 HYDRUS—1D CXTFIT 

分 类 号：S143.1[农业科学—肥料学]