Modeling Nitrate-Nitrogen Losses in Response to Tile Drain Depth and Spacing in a Cold Climate

2005 ◽  
Author(s):  
Vinay Nangia ◽  
Prasanna H. Gowda ◽  
David J. Mulla ◽  
Gary R. Sands
Keyword(s):  
Nitrate Nitrogen ◽  
Cold Climate ◽  
Nitrogen Losses

Predicting Subsurface Drainage, Corn Yield, and Nitrate Nitrogen Losses with DRAINMOD‐N

2000 ◽  
Vol 29 (3) ◽  
pp. 817-825 ◽  
Author(s):  
S. L. Zhao ◽  
S. C. Gupta ◽  
D. R. Huggins ◽  
J. F. Moncrief
Keyword(s):  
Nitrate Nitrogen ◽  
Subsurface Drainage ◽  
Nitrogen Losses ◽  
Corn Yield

Modeling Impacts of Tile Drain Spacing and Depth on Nitrate-Nitrogen Losses

2010 ◽  
Vol 9 (1) ◽  
pp. 61 ◽  
Author(s):  
V. Nangia ◽  
P. H. Gowda ◽  
D. J. Mulla ◽  
G. R. Sands
Keyword(s):  
Nitrate Nitrogen ◽  
Nitrogen Losses ◽  
Drain Spacing

Nitrate-Nitrogen Losses through Subsurface Drainage under Various Agricultural Land Covers

2011 ◽  
Vol 40 (5) ◽  
pp. 1578-1585 ◽  
Author(s):  
Zhiming Qi ◽  
Matthew J. Helmers ◽  
Reid D. Christianson ◽  
Carl H. Pederson
Keyword(s):  
Agricultural Land ◽  
Nitrate Nitrogen ◽  
Subsurface Drainage ◽  
Nitrogen Losses ◽  
Land Covers

scholarly journals Sound Water and Nitrogen Management Decreases Nitrogen Losses from a Drip-Fertigated Cotton Field in Northwestern China

2021 ◽  
Vol 13 (2) ◽  
pp. 1002
Author(s):  
Honghong Ma ◽  
Tao Yang ◽  
Xinxiang Niu ◽  
Zhenan Hou ◽  
Xingwang Ma
Keyword(s):  
Drip Irrigation ◽  
Nitrate Nitrogen ◽  
Nitrogen Loss ◽  
Ammonium Nitrogen ◽  
N Fertilization ◽  
Nitrogen Losses ◽  
Cotton Field ◽  
Phosphorus Fertilization ◽  
Irrigation Regimes ◽  
Loss Coefficients

Drip irrigation systems are becoming more and more mature and are now widely used to improve crop yield and nitrogen use efficiency in Xinjiang, NW China. However, it is not known if leaching is occurring or not and whether leaching will harm the water environment following N fertilization and drip irrigation. The purpose of our study was to estimate the leaching volumes, nitrogen losses, forms of nitrogen losses, and nitrogen loss coefficients under different N fertilization, P fertilization, K fertilization and irrigation regimes. A long-term field experiment was conducted from 2009 to 2015 in Baotou Lake farm in Korla City, Xinjiang, with drip-irrigated cotton (Gossypium hirsutum L.) being grown under different N fertilizer and irrigation regimes. The treatments were designed comprising 0 N, 0 P, and 0 K with an irrigation of 480 mm as the control(N0P0K0W480) and the following three other treatments: (1) 357 kg N·hm−2, 90 kg P·hm−2, 0 kg K2O hm−2, and irrigation of 480 mm (N357P90K0W480); (2) 357 kg N·hm−2, 90 kg P·hm−2, 62 kg K·hm−2, and irrigation of 420 mm (N357P90K62W420); and (3) 240 kg N·hm−2, 65 kg P·hm−2, 62 kg K·hm−2, and irrigation of 420 mm (N240P65K62W420). The results showed the following: (1) the leaching volume was determined by nitrogen fertilization, phosphorus fertilization, and the irrigation amount. In general, the leaching volume was highest under treatment N357P90K0W480. (2) The nitrogen loss was highest under treatment N357P90K0W480. (3) Nitrate nitrogen (NO3–) was the main form of nitrogen lost, followed by ammonium nitrogen (NH4+). (4) The annual nitrogen loss coefficients followed the order of: N357P90K0W480 > N357P90K62W420 > N240P65K62W420 > N0P0K0W480, with values of 0.85, 0.55, 0.30, and 0, respectively. The leaching volume, nitrogen loss, nitrate nitrogen, ammonium nitrogen, and annual nitrogen loss coefficient were lowest under the N240P65K62W420 treatment, except in the N0P0K0W480treatment. These results demonstrate that optimizing the management of water and nitrogen (N240P65K62W420 treatment) can effectively reduce nitrogen losses under drip fertigation and plastic mulching.

scholarly journals Assessment of DRAINMOD-NII Model for Prediction of Nitrogen Losses Through Subsurface Drained Sandy Clay Under Cultivation in South West Punjab, India

2021 ◽  
Author(s):  
MEHRAJ U DIN DAR ◽  
J.P. Singh
Keyword(s):  
Nitrate Nitrogen ◽  
Drainage System ◽  
Nitrogen Losses ◽  
Mean Square ◽  
Validation Period ◽  
Drainage Rate ◽  
South West ◽  
Study Results ◽  
Parameter Values ◽  
Modelling Efficiency

Abstract In the present study, DRAINMOD-NII model was calibrated for the years 2018-2019 and validated for the period 2019-2020 over the two cropping years. The model simulations were statistically evaluated by comparing the measured drain flows and nitrate-nitrogen (NO3-N) with the model simulated drain outflows and nitrate loss. The study results depicted closer agreement between the simulated and observed results for both the calibration and validation periods. The Root Mean Square Error (RMSE) of the drainage rate was 8.88 cm more than observed data,15.41, 0.53 and 0.57 cm were the values recorded for PBIAS, modelling efficiency (NSE) and R2. The similar parameter values for nitrogen load were recorded to be 0.14, 2.76 ,0.84 and 0.88 respectively during the calibration period for rice wheat system. The model was statistically tested during the validation period also, confirming DRAINMOD-NII has the capability to simulate nitrogen losses from the area subjected to subsurface drainage system.

scholarly journals A Comparison of Three Cold-climate Strawberry Production Systems: Environmental Effects

HortScience ◽  
2009 ◽  
Vol 44 (2) ◽  
pp. 298-305 ◽  
Author(s):  
Matthew D. Stevens ◽  
Brent L. Black ◽  
John D. Lea-Cox ◽  
Ali M. Sadeghi ◽  
Jennifer Harman-Fetcho ◽  
...  
Keyword(s):  
Environmental Effects ◽  
Production Systems ◽  
Cold Climate ◽  
Nitrogen Losses ◽  
First Year ◽  
Plastic Mulch ◽  
Flow Meters ◽  
Environmentally Sustainable ◽  
Hand Weeding ◽  
Field Plots

The environmental effects of the three strawberry (Fragaria ×ananassa) cold-climate production systems were compared: the traditional method of conventional matted row (CMR) and the two more recently developed practices of advanced matted row (AMR) and cold-climate plasticulture (CCP). Side-by-side field plots were instrumented with automated flow meters and samplers to measure and collect runoff, which was filtered and analyzed to determine soil, pesticide, and nitrogen losses. Although annual mean runoff volumes were similar for all three production systems, the soil losses from CMR plots were two to three times greater than the CCP plots throughout the study and two to three times greater than the AMR plots only in the first year of the 3-year study. In general, decreases in erosion and runoff volumes were observed in plots that were disturbed less by machine operations and had less foot traffic as a result of decreased need for hand weeding and in the plots that used straw mulch in the furrows between the beds. Timing and intensity of precipitation events also influenced the amount of soil erosion. Pesticide residues and nitrogen losses were also greatest in the runoff from the CMR plots. The two systems that used drip fertigation, AMR and CCP, also had higher nitrogen uptake efficiencies. Overall, the CCP and AMR systems performed similarly for most criteria; however, considering the nonrenewable nature of the plastic mulch and the need to dispose of the plastic mulch in a landfill, the AMR system was more environmentally sustainable than the CCP system.

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