scholarly journals Global distribution and sources of dissolved inorganic nitrogen export to the coastal zone: Results from a spatially explicit, global model

2005 ◽  
Vol 19 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. Dumont ◽  
J. A. Harrison ◽  
C. Kroeze ◽  
E. J. Bakker ◽  
S. P. Seitzinger
Keyword(s):  
Coastal Zone ◽  
Inorganic Nitrogen ◽  
Global Model ◽  
Global Distribution ◽  
Spatially Explicit ◽  
Dissolved Inorganic Nitrogen ◽  
Nitrogen Export

scholarly journals Dissolved inorganic phosphorus export to the coastal zone: Results from a spatially explicit, global model

2005 ◽  
Vol 19 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
John A. Harrison ◽  
Sybil P. Seitzinger ◽  
A. F. Bouwman ◽  
Nina F. Caraco ◽  
Arthur H. W. Beusen ◽  
...  
Keyword(s):  
Coastal Zone ◽  
Inorganic Phosphorus ◽  
Global Model ◽  
Spatially Explicit ◽  
Dissolved Inorganic Phosphorus ◽  
Phosphorus Export

scholarly journals Global patterns of dissolved silica export to the coastal zone: Results from a spatially explicit global model

2009 ◽  
Vol 23 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
A. H. W. Beusen ◽  
A. F. Bouwman ◽  
H. H. Dürr ◽  
A. L. M. Dekkers ◽  
J. Hartmann
Keyword(s):  
Coastal Zone ◽  
Global Model ◽  
Spatially Explicit ◽  
Dissolved Silica ◽  
Global Patterns

Characteristics of Non-Point Source N Export via Surface Runoff from Sloping Croplands in Northeast China

2011 ◽  
Vol 347-353 ◽  
pp. 2302-2307 ◽  
Author(s):  
Hong Xiang Wang ◽  
Yi Shi ◽  
Jian Ma ◽  
Cai Yan Lu ◽  
Xin Chen
Keyword(s):  
Point Source ◽  
Surface Runoff ◽  
Rainfall Intensity ◽  
Inorganic Nitrogen ◽  
Rainfall Amount ◽  
Organic N ◽  
Dissolved Inorganic Nitrogen ◽  
Slope Gradient ◽  
N Loss ◽  
Total N

A field experiment was conducted to study the characteristics of non-point source nitrogen (N) in the surface runoff from sloping croplands and the influences of rainfall and cropland slope gradient. The results showed that dissolved total N (DTN) was the major form of N in the runoff, and the proportion occupied by dissolved inorganic nitrogen (DIN) ranged from 45% to 85%. The level of NH4+-N was generally higher than the level of NO3--N, and averaged at 2.50 mg·L-1and 1.07 mg·L-1respectively. DIN was positively correlated with DTN (R2=0.962). Dissolved organic N (DON) presented a moderate seasonal change and averaged at 1.40 mg·L-1. Rainfall amount and rainfall intensity significantly affected the components of DTN in the runoff. With the increase of rainfall amount and rainfall intensity, the concentrations of DTN, NH4+-N and NO3--N presented a decreased trend, while the concentration of DON showed an increased trend. N loss went up with an increase in the gradient of sloping cropland, and was less when the duration was longer from the time of N fertilization.fertilization.

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