scholarly journals NUMERICAL SIMULATION OF NITRATE NITROGEN TRANSPORT WITH DENITRIFYING CONDITION IN UNSATURATED ANDO SOIL

2001 ◽  
Vol 45 ◽  
pp. 49-54
Author(s):  
Naoki YAMASHITA ◽  
Satoru SUGIO
Keyword(s):  
Numerical Simulation ◽  
Nitrate Nitrogen ◽  
Nitrogen Transport

Numerical Simulation on Characteristics of Nitrate Nitrogen Leaching under Different Irrigation Levels

2014 ◽  
Vol 662 ◽  
pp. 153-159
Author(s):  
Shu Hua Ji ◽  
Jiang Yang Deng
Keyword(s):  
Numerical Simulation ◽  
Simulation Experiment ◽  
Nitrate Nitrogen ◽  
Soil Column ◽  
Nitrogen Leaching ◽  
Intensity Level ◽  
Irrigation Amount ◽  
Irrigation Level ◽  
Irrigation Intensity ◽  
Irrigation Levels

The characteristics of nitrate nitrogen leaching in soil under different irrigation levels were studied by soil column simulation experiment with numerical simulation done using LEACHM model taking nitrate nitrogen leaching under different irrigation levels as the research background. In sandy soils, an irrigation amount of 300 mm would cause nitrate nitrogen to leach downward 75~150 cm, with a leaching amount of 10~30.7 kg/ha; and an irrigation amount of 700 mm would make nitrate nitrogen leach downward about 3.5 m, with a leaching amount of 98 kg/ha. Research data showed that the amount of nitrate nitrogen leaching was positively correlated with the irrigation intensity level, irrigation level directly determined the amount of nitrate nitrogen leaching, and influenced its leaching depth.

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

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.

Experiment and numerical simulation of nitrogen transport in soils irrigated with treated sewage

2008 ◽  
Vol 57 (2) ◽  
pp. 203-217 ◽  
Author(s):  
J. Yang ◽  
L. Wang ◽  
C. Lu ◽  
N. Jayawardane
Keyword(s):  
Numerical Simulation ◽  
Nitrogen Transport ◽  
Treated Sewage

Evaluation of Nitrate-Nitrogen Transport in a Potato-Barley Rotation

2001 ◽  
Vol 65 (3) ◽  
pp. 878-883 ◽  
Author(s):  
Jorge A. Delgado ◽  
Ronald R. Riggenbach ◽  
Richard T. Sparks ◽  
Merlin A. Dillon ◽  
Lawrence M. Kawanabe ◽  
...  
Keyword(s):  
Nitrate Nitrogen ◽  
Nitrogen Transport

scholarly journals Numerical Simulation of Water and Nitrogen Transport in Three Turfgrass Systems

itsrj ◽  
2021 ◽  
Author(s):  
Hongyan Sun ◽  
Kelly Kopp ◽  
Grant Cardon ◽  
Scott Jones
Keyword(s):  
Numerical Simulation ◽  
Nitrogen Transport
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