Experiment on Nitrate Nitrogen Transport and Transformation in Saline Soil under the Irrigation-Drainage Condition in Arid Inland Basin

2008 ◽  
Author(s):  
Yinglan Cao ◽  
Menggui Jin ◽  
Yanfeng Liu
Keyword(s):  
Nitrate Nitrogen ◽  
Saline Soil ◽  
Nitrogen Transport ◽  
Transport And Transformation ◽  
Irrigation Drainage

scholarly journals Numerical Analysis of the Transport and Fate of Nitrate in the Soil and Nitrate Leaching to Drains

2001 ◽  
Vol 1 ◽  
pp. 170-180 ◽  
Author(s):  
Alaa El-Sadek ◽  
Mona Radwan ◽  
Jan Feyen
Keyword(s):  
Nitrate Leaching ◽  
Initial Conditions ◽  
Continuous Cropping ◽  
Nitrogen Transport ◽  
State Variables ◽  
Nitrogen Application ◽  
Transport And Transformation ◽  
Bottom Boundary Condition ◽  
Rainfall Depth ◽  
Simulation Results

In this study, the transport and fate of nitrate within the soil profile and nitrate leaching to drains were analyzed by comparing historic field data with the simulation results of the DRAINMOD model. The nitrogen version of DRAINMOD was used to simulate the performance of the nitrogen transport and transformation of the Hooibeekhoeve experiment, situated in the sandy region of the Kempen (Belgium) and conducted for a 30-year (1969–1998) period. In the analysis, a continuous cropping with maize was assumed. Comparisons between experimentally measured and simulated state variables indicate that the nitrate concentrations in the soil and nitrate leaching to drains are controlled by the fertilizer practice, the initial conditions, and the rainfall depth and distribution. Furthermore, the study reveals that the model used gives a fair description of the nitrogen dynamics in the soil and subsurface drainage at field scale. From the comparative analysis between experimental data and simulation results it can also be concluded that the model after calibration is a useful tool to optimize as a function of the combination “climate-crop-soil-bottom boundary condition” the nitrogen application strategy resulting in an acceptable level of nitrate leaching for the environment.

Nitrate-Nitrogen Transport in Horizontal Soil Columns of the Yellow River Delta Wetland, China

2012 ◽  
Vol 40 (10) ◽  
pp. 1106-1110 ◽  
Author(s):  
Junhong Bai ◽  
Xiaofei Ye ◽  
Yuan Zhi ◽  
Haifeng Gao ◽  
Laibin Huang ◽  
...  
Keyword(s):  
Nitrate Nitrogen ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Nitrogen Transport ◽  
Soil Columns ◽  
The Yellow River Delta ◽  
Yellow River Delta Wetland

Nitrogen transport and transformation in the saturated-unsaturated zone under recharge, runoff, and discharge conditions

2016 ◽  
Vol 23 (9) ◽  
pp. 8741-8748 ◽  
Author(s):  
Zhifei Ma ◽  
Xinying Lian ◽  
Yonghai Jiang ◽  
Fanhua Meng ◽  
Beidou Xi ◽  
...  
Keyword(s):  
Unsaturated Zone ◽  
Nitrogen Transport ◽  
Transport And Transformation

Modeling water flow and nitrate–nitrogen transport on golf course under turfgrass

2014 ◽  
Vol 15 (8) ◽  
pp. 1847-1859 ◽  
Author(s):  
Vilim Filipović ◽  
Gurpal S. Toor ◽  
Gabrijel Ondrašek ◽  
Radka Kodešová
Keyword(s):  
Water Flow ◽  
Nitrate Nitrogen ◽  
Golf Course ◽  
Nitrogen Transport

A Quantitative Study of Nitrogen Loss From Water of a Small, Spring-Fed Stream

1975 ◽  
Vol 10 (1) ◽  
pp. 110-117 ◽  
Author(s):  
N.K. Kaushik ◽  
J.B. Robinson ◽  
P. Sain ◽  
H.R. Whiteley ◽  
W. Stammers
Keyword(s):  
Aquatic Macrophytes ◽  
Nitrate Nitrogen ◽  
Nitrogen Loss ◽  
Stream Sediments ◽  
Nitrogen Transport ◽  
Riparian Plants ◽  
Nitrate N ◽  
Decomposition Of Organic Matter ◽  
Kjeldahl Nitrogen

Abstract With a view to determining nitrogen sink processes, if any, in streams and the factors that govern these processes, nitrogen transport was studied in a 2 km-long, perennial, spring-fed stream during the summer months of 1973 and 1974. Concentrations of ammonium, nitrite and Kjeldahl nitrogen were small but those of nitrate nitrogen were unusually high. However, as the water moved downstream it progressively lost nitrate N. This loss represented 59.4% and 46.7% of the respective inputs during 1973 and 1974. The decrease in the concentration of nitrate N could neither be attributed to dilution nor to nitrogen immobilization during decomposition of organic matter nor to the uptake by aquatic macrophytes. Laboratory experiment showed that the stream sediments have significant, capacity for denitrification of nitrate in water overlying them, even when the water is thoroughly oxygenated. Although the role of riparian plants in the uptake of nitrogen has not been fully elucidated, it seems that denitrification in the stream sediment may act as an important permanent nitrogen sink.

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