Effect of Saturated Near Surface on Nitrate and Ammonia Nitrogen Losses in Surface Runoff at the Loess Soil Hillslope
Joint Authors
Cao, Ning
Zheng, Fen-li
Zhang, Yu-bin
Source
International Journal of Chemical Engineering
Issue
Vol. 2010, Issue 2010 (31 Dec. 2010), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-07-05
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Water pollution from agricultural fields is a global problem and cause of eutrophication of surface waters.
A laboratory study was designed to evaluate the effects of near-surface hydraulic gradients on NO3–N and NH4–N losses in surface runoff from soil boxes at 27% slope undersimulated rainfall of a loess soil hillslope.
Experimental treatments included two near-surface hydraulic gradients (free drainage, FD; saturation, SA), three fertilizer application rates (control, no fertilizer input; low, 120 kg N ha-1; high, 240 kg N ha-1), and simulated rainfall of 100 mm h-1 was applied for 70 min.
The results showed that saturated near-surface soil moisture had dramatic effects on NO3–N and NH4–N losses and water quality.
Under the low fertilizer treatment, average NO3–N concentrations in runoff water of SA averaged 2.2 times greater than that of FD, 1.6 times greater for NH4–N.
Under the high fertilizer treatment, NO3–N concentrations in runoff water from SA averaged 5.7 times greater than that of FD, 4.3 times greater for NH4–N.
Nitrogen loss formed with NO3–N is dominant during the event, but not NH4–N.
Under the SA condition, the total loss of NO3–N from low fertilizer treatment was 34.2 to 42.3% of applied nitrogen, while under the FD treatment that was 3.9 to 6.9%.
However, the total loss of NH4–N was less than 1% of applied nitrogen.
These results showed that saturated condition could make significant contribution to water quality problems.
American Psychological Association (APA)
Zhang, Yu-bin& Zheng, Fen-li& Cao, Ning. 2010. Effect of Saturated Near Surface on Nitrate and Ammonia Nitrogen Losses in Surface Runoff at the Loess Soil Hillslope. International Journal of Chemical Engineering،Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-469028
Modern Language Association (MLA)
Zhang, Yu-bin…[et al.]. Effect of Saturated Near Surface on Nitrate and Ammonia Nitrogen Losses in Surface Runoff at the Loess Soil Hillslope. International Journal of Chemical Engineering No. 2010 (2010), pp.1-7.
https://search.emarefa.net/detail/BIM-469028
American Medical Association (AMA)
Zhang, Yu-bin& Zheng, Fen-li& Cao, Ning. Effect of Saturated Near Surface on Nitrate and Ammonia Nitrogen Losses in Surface Runoff at the Loess Soil Hillslope. International Journal of Chemical Engineering. 2010. Vol. 2010, no. 2010, pp.1-7.
https://search.emarefa.net/detail/BIM-469028
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-469028